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A Forager’s Year

No. 107

American lotus

Nelumbo lutea; escaped N. nucifera (sacred lotus)

water chinquapin, yellow lotus; also escaped sacred lotus

Nut & seed seeds (green seeds raw or boiled; ripe seeds cooked or ground)

Drawing: Britton & Brown, Illustrated Flora (1913)

Find
Common in the right habitat
Effort
Grab & eat
ID risk
Beginner
Origin
mixed
Safety marks
  • Spray risk
Uses
  • Eat raw / salad
  • Flour

Season

  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec

in season peak

Picking: The rules are unclear. Ask the park. See Where you may pick.

What these mean

Find

1 Everywhere · 2 Common in the right habitat · 3 Patchy · 4 Elusive. This is about how much there is, not whether you may pick it. It is based on iNaturalist sightings within 25 km (about 15 miles) of downtown DC, counted on October 3, 2026. The four rules that each plant’s “Find” reason refers to: (A) the estimate is the confirmed sightings, plus the unconfirmed ones (scaled down where the plant has lookalikes in its genus), plus the sightings marked as planted; (B) the tier by estimate: 1,500 or more is tier 1, 250–1,499 tier 2, 50–249 tier 3, under 50 tier 4; (C) tier 1, Everywhere, also needs a source saying the plant is common in lawns, sidewalks, yards or gardens, vacant lots or towns, or at least one DC street tree of it per km of sidewalk, otherwise it is tier 2; (D) if a reliable source says the plant is rare in this region, or that wild plants rarely bear the harvest, only planted sightings count. iNaturalist is a website and phone app where people post photos of the plants and animals they see. A sighting is “research grade” when other users have confirmed what it is; “needs ID” sightings are not confirmed yet, and “cultivated” ones are marked as planted.

Effort

1 Grab & eat · 2 Quick kitchen prep (under about 30 minutes) · 3 Real work (hours, or cooking needed for safety) · 4 Project (days or equipment). Scored on the simplest worthwhile use; each plant’s page says why.

ID risk

How hard it is to harvest safely. Beginner: no dangerous lookalike, and the edible part is not easily confused with a toxic part. Careful: a toxic lookalike, or toxic parts that end up in the harvest unless removed (for example elderberry stems, unripe ground cherries), or other parts of the plant rated medium-or-higher toxicity, with reliable features to separate them. Expert only: a potentially deadly lookalike that is hard to separate, or (for not-recommended harvests like pokeweed) a plant whose safe preparation can’t be guaranteed. Toxic parts that are obviously separate and thrown away anyway (pits, seeds, skins) don’t raise it; the Toxic parts mark carries that warning.

Native or not, and the invader stars

Origin is where the plant comes from: native, non-native, or mixed (the harvest covers both). The stars rate plants on invasive plant lists: ★★★ Virginia DCR “High” or Maryland prohibited invasive · ★★ Virginia “Medium” · ★ Virginia “Low” · ☆ listed only by the Maryland Invasive Species Council or the Mid-Atlantic Plant Invaders guide (advisory) · no stars: native or not listed.

Safety marks and flags

Deadly lookalike / Toxic lookalike: a cited source names a lookalike of that danger, recorded near DC (an iNaturalist sighting within 25 km, a DC street tree, or a Smithsonian listing for DC) and looking like the part you eat. Other lookalikes are still listed, marked “not recorded near DC” or as not looking like the part you eat. Deadly means a source says eating it may be fatal or calls it deadly, or NC State rates it high severity with life-threatening symptoms (sources sometimes disagree; for example Virginia creeper). Each plant’s Lookalikes list says how to tell them apart; “harmless (may be edible)” lookalikes are listed so you know a mix-up isn’t dangerous. Cook first: cooking is needed for safety (for daylilies it is a precaution, not a sourced requirement). Eat in moderation: a source says to limit quantity or frequency (for example oxalates in sorrels and dock, ginkgotoxin, safrole). Spray risk: a source says the plant is commonly treated with herbicide in parks or lawns (invasive control, lawn weeds) or, for ginkgo, sprayed to stop fruiting. Contamination: a source says the plant concentrates pollutants. Each plant’s Safety flags list gives the details and sources.

Seasons

Start, peak and end are given in thirds of a month: early, mid or late. A plant counts as in season for a month if it is in season at any point in that month. Some greens and roots have a second window, in spring or fall; their page shows each window. A season that runs across New Year is shown as one window.

What it looks like

A native water plant of the lotus family that spreads by thick rootstocks in the mud of shallow water, with round, bowl-shaped leaves 1-2 feet across held 1-2 feet above the water or floating on it, the stalk attached at the middle of the leaf (NC State; Eat The Weeds). Fragrant pale yellow flowers up to 10 inches across bloom in summer (NC State; Lady Bird Johnson Wildflower Center). The center of the flower grows into a flat-topped seed head that looks like a showerhead, with around 20 seeds embedded in its flat face (Eat The Weeds; NC State); it turns brown and woody as it dries (NC State). The ripe seeds are round, dark brown and about half an inch long (Eat The Weeds), like acorns (Mississippi State). Boiled, the plump green seeds taste like chickpeas with a little chestnut or corn flavor, and half-ripe seeds taste like chestnuts (Eat The Weeds). Sacred lotus, an Asian lotus with pink or whitish flowers, is eaten the same way (NC State; Virginia plant atlas).

Safety

No toxic part is reported: NC State lists the tubers, leaves and seeds of American lotus as edible and gives no poison warning, and sacred lotus seeds are used in cooking (NC State). Mature seeds hold a little sprout that Eat The Weeds calls too bitter to eat; it advises not eating the sprout if it is still bitter after cooking, and notes that skinny seeds tend to be bitter. A 2025 review describes this sprout in sacred lotus as bitter and rich in alkaloids studied as medicines, with low toxicity (Biomolecules). Lotus can take up heavy metals: a study of sacred lotus grown in an old tin-mining pond found the most lead and chromium in the seeds, with lead above the Codex Alimentarius food limits (Food Science and Technology Research), so gather only from water you know is clean. Mississippi State Extension recommends herbicides such as 2,4-D for controlling American lotus where it takes over ponds, so avoid stands that may have been sprayed. Harmless lookalike: water lilies, which NC State says are eaten in moderation in some parts of the world, grow with lotus but lack its round, unnotched leaves with the stalk at the center, and the lotus seed head is unmistakable (Eat The Weeds; Mississippi State).

Lookalikes

  • Water lilies Nymphaea spp. harmless (may be edible)

    Water lilies grow in mixed stands with American lotus (Mississippi State). Lotus leaves are round and not split, with the stalk attached at the middle of the leaf, and many are held above the water; Eat The Weeds contrasts this with many water lilies, and Mississippi State points to the lotus leaf’s central stalk and lack of a notch. The lotus seed head is unmistakable (Mississippi State). NC State says water lily leaves and flowers are eaten in moderation in some parts of the world, so a mix-up is not known to be dangerous.

Safety flags

Safety marks and flags: what this means

Deadly lookalike / Toxic lookalike: a cited source names a lookalike of that danger, recorded near DC (an iNaturalist sighting within 25 km, a DC street tree, or a Smithsonian listing for DC) and looking like the part you eat. Other lookalikes are still listed, marked “not recorded near DC” or as not looking like the part you eat. Deadly means a source says eating it may be fatal or calls it deadly, or NC State rates it high severity with life-threatening symptoms (sources sometimes disagree; for example Virginia creeper). Each plant’s Lookalikes list says how to tell them apart; “harmless (may be edible)” lookalikes are listed so you know a mix-up isn’t dangerous. Cook first: cooking is needed for safety (for daylilies it is a precaution, not a sourced requirement). Eat in moderation: a source says to limit quantity or frequency (for example oxalates in sorrels and dock, ginkgotoxin, safrole). Spray risk: a source says the plant is commonly treated with herbicide in parks or lawns (invasive control, lawn weeds) or, for ginkgo, sprayed to stop fruiting. Contamination: a source says the plant concentrates pollutants. Each plant’s Safety flags list gives the details and sources.

ID risk
Beginner
Why
No toxic lookalike is named. Water lilies, which NC State says are eaten in moderation in some parts of the world, grow with lotus, but lotus leaves are round and not split, with the stalk attached at the middle, and the lotus seed head is unmistakable (Eat The Weeds; Mississippi State).
Soil risk
low
ID risk: what this means

How hard it is to harvest safely. Beginner: no dangerous lookalike, and the edible part is not easily confused with a toxic part. Careful: a toxic lookalike, or toxic parts that end up in the harvest unless removed (for example elderberry stems, unripe ground cherries), or other parts of the plant rated medium-or-higher toxicity, with reliable features to separate them. Expert only: a potentially deadly lookalike that is hard to separate, or (for not-recommended harvests like pokeweed) a plant whose safe preparation can’t be guaranteed. Toxic parts that are obviously separate and thrown away anyway (pits, seeds, skins) don’t raise it; the Toxic parts mark carries that warning.

Soil risk: what this means

Based on the part you eat, following the urban-soil lead guidance on the Field safety page: higher for greens, shoots and roots; moderate for flowers; low for fruit, nuts and sap.

Field safety for every outing (poison ivy, ticks, soil, and more)

When to pick

Starts
mid Jul
Peak
early Aug–late Sep
Ends
late Oct

Around DC lotus flowers from June through August, and peak bloom at Kenilworth Park & Aquatic Gardens comes in July (National Park Service). Seeds form in the flat-topped heads after the flowers fade; the young green seeds are eaten raw or boiled, and the seeds turn dark brown as they ripen (Eat The Weeds; Mississippi State). NC State says the fruits are available June to October in North Carolina. Around DC, seed heads are logged mostly from July to November, most in August (iNaturalist). No source gives seed dates for the DC area, so all three boundaries are estimates.

How the dates were worked out

Every start, peak and end was re-checked in October 2026. “Sourced” means a source opened during the check states that timing for the DC or Mid-Atlantic area. “Estimated” means no source states it exactly; the reason, the evidence and the source links are under “How the dates were worked out” on each plant’s page. Peaks are often estimated, because few sources name a peak. iNaturalist evidence means research-grade sightings near DC, by month, of the plant at that stage (for example, in fruit). iNaturalist is a website and phone app where people post photos of the plants and animals they see. A sighting is “research grade” when other users have confirmed what it is; “needs ID” sightings are not confirmed yet, and “cultivated” ones are marked as planted.

Season basis: estimated: start, peak, end

Start

estimated: No source dates the first edible seeds around DC; green seeds follow the flowers, which peak in July here, and the first seed heads are logged in July.

Peak

estimated: No source names a best time; August to September covers the most logged seed heads and the green to half-ripe seeds the sources praise most.

End

estimated: NC State’s October end is for North Carolina, not the DC area; ripe seeds stay in the drying heads into fall, and the last seed heads are logged in October and November here.

Evidence

start: National Park Service (Kenilworth): 'Lotus flowers last up to 5 days and typically bloom between the months of June through August.' Lotus and Water Lily Festival (Saturday, July 18th and Sunday, July 19th): 'surrounded by the peak bloom of lotuses and water lilies'. iNaturalist seed heads (any grade) within 25 km: Jun 0, Jul 4, Aug 7. | peak: iNaturalist seed heads (any grade): Jul 4, Aug 7, Sep 2, Oct 2. Eat The Weeds: 'They can be eaten like peas when young.' Mississippi State: 'Immature seeds can be eaten raw'. | end: NC State: 'Fruits are available June-October.' (North Carolina). iNaturalist seed heads (any grade): Oct 2, Nov 1.

Where to look

Still, shallow ponds and lake edges. Most lotus around DC is planted at Kenilworth Park & Aquatic Gardens, where gathering is not allowed. Lotus growing on its own is logged most at Lake Redington in Patuxent Research Refuge, a federal research refuge whose picking rules were not checked (ask first). The C&O Canal and Virginia state parks may or may not count lotus seeds as allowed fruits or nuts (ask the park), but within the circle no lotus is logged on the canal (its sightings are far upriver at Hancock, Maryland) or in Mason Neck or Leesylvania. Otherwise pick only on private ponds with the owner’s permission; Virginia lists American lotus on its watchlist of uncommon plants.

Habitats
wetlands, marshes & pond edges
Habitats: what this means

Listed where the plant’s own sources place it in that habitat. “Disturbed ground & waste places” means a cited source places it on disturbed areas, sites, soil or ground, on waste places or waste ground, on construction or abandoned building sites (old home sites count), on rubble or in strip mines. When the source gives examples of the disturbed places, at least one example must be of that kind. Examples that do not count: natural or forestry disturbance (treefall gaps, fire, windthrow, flood scour, old riverbanks and creeks, clear-cuts); roadsides, railroads and rights-of-way; and abandoned fields, pastures and farmland, which are “Old fields & meadows”. “Vacant lots” only where a source says vacant or empty lots.

Most-logged places

None of the most-logged places allows picking.

Ask first: rules unclear or not checked

  • Patuxent Research Refuge

    11 sightings · Legal to pick: unknown · see them on iNaturalist

    Picking rules not checked. A federal facility, so ask before picking anything.

Most-logged places: what this means

The places with the most research-grade iNaturalist sightings within 25 km of downtown DC (re-counted in October 2026 over every named place, campuses, condominiums and private grounds included), each marked legal to pick or not. A sighting inside several named places counts once, for the smallest of them, but a sighting inside a National Park Service park never counts for a private, campus or unchecked place. iNaturalist shows where people walk and log plants, not true abundance. Private campuses, condominiums, museums, estates and utility land (Pepco’s power-line land near Sligo Creek) are marked “no” (pick only with the owner’s permission); public university campuses, city parks and other places whose picking rules were not checked (county stormwater land, the U.S. Capitol Grounds, Greenbelt’s North Woods, federal facilities such as the National Zoo) are “unknown”. A place needs at least 2 sightings, so plants with very few sightings have no places. At-risk plants (butternut, nannyberry, American chestnut, ramps, riverbank goldenrod) get places like every other plant; each page says why the plant is at risk and gives any advice its sources give. For some places, mostly Rock Creek Park, the iNaturalist map shows more sightings than the count here, because a map link cannot leave out exactly the sightings credited to another place. iNaturalist is a website and phone app where people post photos of the plants and animals they see. A sighting is “research grade” when other users have confirmed what it is; “needs ID” sightings are not confirmed yet, and “cultivated” ones are marked as planted.

Ways to use it

  • young green seeds raw, like peas (Mississippi State; Eat The Weeds)
  • boiled about 20 minutes, pushed out of the shell and salted (Eat The Weeds)
  • prepared like nuts, or older seeds ground into flour (Lady Bird Johnson Wildflower Center; Eat The Weeds)
  • ripe seeds popped (Eat The Weeds)
  • boiled down into a paste that, sweetened, fills pastries (Eat The Weeds)
  • harvest the seed heads from stands in shallow ponds and the edges of slow rivers (Eat The Weeds)

Keeping

Eat green seeds within about a week; dry ripe seeds and keep them in the shell for months.

Use within
within a few days
Keeps fresh
Green seeds: keep cold and moist and use within about a week, like fresh peas (general guidance for peas, University of Minnesota). Ripe seeds: dry them and store them in the shell; nuts dried and stored in the shell keep several months at room temperature (general guidance for nuts, Washington State University).
Keeping basis
general guidance for its type

Ways to keep it

  • Store whole as researched: store in shell; canning: n/a (not shelf-canned)

    Dry the ripe seeds and keep them in the shell; nuts dried and stored in the shell keep several months at room temperature, while shelled nuts must be refrigerated or frozen (general guidance for nuts, Washington State University).

Canning: what this means

Shelf-stable canning, three levels. Lab-tested: a lab-tested recipe from the National Center for Home Food Preservation (NCHFP) or Oregon State covers this fruit and product, or a generic recipe for its kind (the line says so, for example chokeberry). Extension recipe: a published Extension recipe (University of Alaska Fairbanks, written for Alaska species; University of Maine’s dandelion jelly), or a process that is safe only with a pH meter; follow it exactly, never improvise. No tested recipe: refrigerate or freeze, don’t can. “Hot-bottled syrup” = maple and walnut syrup, which keep when bottled hot at full syrup density. The Canning line names the exact product each source covers, for example “whole berries” or “juice”; a product not named there (such as juice from a berry with only a whole-berry recipe) has no tested recipe.

Keeping basis: what this means

“Specific to this plant” or “general guidance for its type” (for example NCHFP guidance for leafy greens applied to a wild green).

Nutrition

Not researched: in October 2026, only the calendar’s plants of the month and chicory leaves were researched.

Native or not

American lotus is native (USDA PLANTS); sacred lotus is introduced (USDA PLANTS) and is planted in water gardens, with escapes in scattered places in the southeastern U.S. that may become invasive (Virginia plant atlas). Neither is on the Virginia DCR, MDA or MISC invasive lists.

Origin
mixed
Native range
N. lutea: southeastern Canada to Mexico, the Greater Antilles and Colombia (NC State); N. nucifera: Asia (Iran to China, Japan, New Guinea) and Australia (NC State)
Virginia invasive rank
not listed
Maryland invasive status
not listed
Native or not, and the invader stars: what this means

Origin is where the plant comes from: native, non-native, or mixed (the harvest covers both). The stars rate plants on invasive plant lists: ★★★ Virginia DCR “High” or Maryland prohibited invasive · ★★ Virginia “Medium” · ★ Virginia “Low” · ☆ listed only by the Maryland Invasive Species Council or the Mid-Atlantic Plant Invaders guide (advisory) · no stars: native or not listed.

Virginia DCR, Virginia Invasive Plant Species List (effective September 2024), verbatim: "Under the DCR Invasive Species Assessment Protocol, approved by the Virginia Invasive Species Working Group, January 2024, species were ranked as exhibiting high, medium or low levels of invasiveness based on their threat to natural communities and native species. Invasiveness rank is higher for species that: • Alter ecosystem processes, such as succession, hydrology or fire regime. • Are capable of invading undisturbed natural communities. • Cause substantial impacts on rare or vulnerable species or natural communities or high-quality examples of more common communities. • Are found widely distributed and generally abundant where present. • Disperse readily to new areas. • Are difficult to control." The list also states: "The list is for educational purposes only and has no regulatory authority."

Maryland Department of Agriculture, Maryland Prohibited Invasive Plant Law and Regulations page, verbatim: "Plants on the Maryland Prohibited Invasive Plant List may not be added to stock after the effective date and should not be sold after their phase-out period ends."

No official DC invasive plant list was found.

How the ratings were set

Find
Common in the right habitat Estimate 742 = 24 research-grade iNaturalist sightings within 25 km + 13 needs-ID sightings counted in full (the harvest is the whole genus) + 705 'cultivated' (planted) sightings (rule A); that is tier 2 by count (rule B). Of the 24 research-grade sightings, 18 are American lotus and 6 are escaped sacred lotus (N. nucifera); the 'cultivated' records are planted lotus, 456 of them in the water gardens at Kenilworth Park & Aquatic Gardens. Rule D does not apply: the Virginia Division of Natural Heritage puts American lotus on its watchlist of taxa that are "decidedly uncommon in Virginia but are not scarce enough to merit inclusion on the Rare Vascular Plant List", and the Digital Atlas of the Virginia Flora calls it "Infrequent and local in the Coastal Plain, Piedmont, and n. mountains"; neither calls it rare or very infrequent. Final tier 2.
Effort
Grab & eat Reach the seed heads from the shore, by wading or from a boat, push out the young green seeds and eat them raw; boiling them 20 minutes and shelling them is a 2, and cooking or grinding the ripe seeds is a 3.
Find: what this means

1 Everywhere · 2 Common in the right habitat · 3 Patchy · 4 Elusive. This is about how much there is, not whether you may pick it. It is based on iNaturalist sightings within 25 km (about 15 miles) of downtown DC, counted on October 3, 2026. The four rules that each plant’s “Find” reason refers to: (A) the estimate is the confirmed sightings, plus the unconfirmed ones (scaled down where the plant has lookalikes in its genus), plus the sightings marked as planted; (B) the tier by estimate: 1,500 or more is tier 1, 250–1,499 tier 2, 50–249 tier 3, under 50 tier 4; (C) tier 1, Everywhere, also needs a source saying the plant is common in lawns, sidewalks, yards or gardens, vacant lots or towns, or at least one DC street tree of it per km of sidewalk, otherwise it is tier 2; (D) if a reliable source says the plant is rare in this region, or that wild plants rarely bear the harvest, only planted sightings count. iNaturalist is a website and phone app where people post photos of the plants and animals they see. A sighting is “research grade” when other users have confirmed what it is; “needs ID” sightings are not confirmed yet, and “cultivated” ones are marked as planted.

Effort: what this means

1 Grab & eat · 2 Quick kitchen prep (under about 30 minutes) · 3 Real work (hours, or cooking needed for safety) · 4 Project (days or equipment). Scored on the simplest worthwhile use; each plant’s page says why.

Sources

31 sources, each linked to the original.

  1. List of Rare, Threatened, and Endangered Plants of Maryland (March 2026) Maryland DNR Wildlife and Heritage Service, Natural Heritage ProgramBacks up: picking rules
  2. C&O Canal NHP Superintendent’s Compendium, effective September 11, 2026 National Park Service, Chesapeake and Ohio Canal NHPBacks up: picking rules
  3. National Capital Parks-East 2026 Superintendent’s Compendium National Park ServiceBacks up: picking rules
  4. Rock Creek Park Superintendent’s Compendium National Park ServiceBacks up: picking rules
  5. 4VAC5-30-50. Flowers, plants, minerals, etc. Virginia Law Library (law.lis.virginia.gov)Backs up: picking rules
  6. 36 CFR 2.1 - Preservation of natural, cultural and archeological resources Legal Information Institute, Cornell Law School (text of federal regulation)Backs up: picking rules
  7. Natural Heritage Resources of Virginia: Rare Plants (September 2026) Virginia Department of Conservation and Recreation, Division of Natural HeritageBacks up: picking rules, findability
  8. Nelumbo lutea (American Lotus, American Lotus-lily, Nelumbo, Yonkapin) NC State Extension Gardener Plant ToolboxBacks up: description, habitat, uses, safety, season, native or invasive status
  9. Nelumbo nucifera (Sacred Lotus) NC State Extension Gardener Plant ToolboxBacks up: description, safety, native or invasive status
  10. Nelumbo lutea (American Lotus, Yellow Water Lotus, Yellow Lotus) Lady Bird Johnson Wildflower CenterBacks up: description, uses
  11. American Lotus: Worth Getting Wet For (Green Deane) Eat The WeedsBacks up: description, uses, safety, season, habitat
  12. Annotated Checklist of the Vascular Plants of the Washington-Baltimore Area, Part I (Shetler & Orli, 2000) Smithsonian Institution, National Museum of Natural History, Department of BotanyBacks up: habitat
  13. Nelumbo nucifera (Sacred Lotus) (Digital Atlas of the Virginia Flora) Virginia Botanical Associates (Digital Atlas of the Virginia Flora)Backs up: habitat, description, native or invasive status
  14. Nelumbo lutea (American Lotus) (Digital Atlas of the Virginia Flora) Virginia Botanical Associates (Digital Atlas of the Virginia Flora)Backs up: habitat, findability
  15. Lotus (Kenilworth Park & Aquatic Gardens) National Park ServiceBacks up: habitat, season, description
  16. iNaturalist research-grade observations of Nelumbo (lotus) within 25 km of downtown DC iNaturalistBacks up: habitat, findability
  17. Harvesting and storing home garden vegetables University of Minnesota ExtensionBacks up: keeping
  18. Nuts and Seeds (Master Food Preserver materials) Washington State University Extension, Lewis CountyBacks up: keeping
  19. USDA PLANTS Database: Nelumbo lutea (NELU), native status USDA NRCSBacks up: native or invasive status
  20. USDA PLANTS Database: Nelumbo nucifera (NENU2), native status USDA NRCSBacks up: native or invasive status
  21. Virginia Invasive Plant Species List (effective date: September 2024) Virginia Department of Conservation and Recreation, Division of Natural HeritageBacks up: native or invasive status
  22. Maryland Prohibited Invasive Plant Law and Regulations (Maryland Prohibited Invasive Plant List, updated January 2026; additions effective July 15, 2026; 'Next Plants To Be Assessed' 2026-2027) Maryland Department of Agriculture, Plant Protection & Weed ManagementBacks up: native or invasive status
  23. Non-Native Invasive Terrestrial Plant Species in the State of Maryland (updates approved through the April 18, 2024 MISC meeting) Maryland Invasive Species CouncilBacks up: native or invasive status
  24. Plant Invaders of Mid-Atlantic Natural Areas, Field Guide (Swearingen & Fulton, 2022; successor to the NPS/USFWS 5th ed., 2017) Mid-Atlantic Invasive Plant Council / Passiflora Press (hosted by Bugwood/Mid-Atlantic Invaders Tool)Backs up: native or invasive status
  25. Invasive Plants in the District DC Department of Energy & EnvironmentBacks up: native or invasive status
  26. Pharmacological Potential and Mechanisms of Bisbenzylisoquinoline Alkaloids from Lotus Seed Embryos (Biomolecules, 2025) NIH National Library of Medicine (PubMed Central)Backs up: safety
  27. Nymphaea (Water Lily) NC State Extension Gardener Plant ToolboxBacks up: safety, safety details
  28. Antioxidant Properties and Heavy Metal Content of Lotus Plant (Nelumbo nucifera Gaertn) Grown in Ex-tin Mining Pond near Kampar, Malaysia (Food Science and Technology Research 18(3), 2012) Japanese Society for Food Science and Technology (J-STAGE)Backs up: safety, safety details
  29. Lotus and Water Lily Festival (Kenilworth Park & Aquatic Gardens) National Park ServiceBacks up: season
  30. iNaturalist research-grade observations of Nelumbo (lotus) within 25 km of Washington, DC, by month (all, flowering, fruiting; and fruiting and flowering at any quality grade, planted included) iNaturalistBacks up: season
  31. American Lotus, Nelumbo lutea (Southeastern Aquatic Plants, Publication 3735-16) Mississippi State University ExtensionBacks up: uses, safety, season, description