Creeping cucumber

What it looks like

A slender native vine of the cucumber family that climbs over shrubs, fences and other plants with curly tendrils (NC State; Eat The Weeds). Its leaves are small for a vine, with 3 to 5 lobes, somewhat maple- or ivy-shaped (NC State; North Carolina Natural Heritage Program), and Eat The Weeds says a crushed leaf smells like a cucumber. The yellow flowers are tiny, with 5 lobes, about 1/4 inch across or smaller, on long stalks (NC State). The fruit looks like a doll-size watermelon: an oval, smooth fruit 1 to 2 centimeters (about 1/2 to 3/4 inch) long, green and mottled or lightly speckled, dangling on a long stalk (Eat The Weeds; North Carolina Natural Heritage Program; NC State says one inch). It turns black, with white seeds, when ripe (NC State). Eat The Weeds says the light-green fruit is crisp, with a cucumber aroma and taste, sometimes slightly tart, and Clemson Extension says the green fruit tastes like a strong cucumber.

Safety

Eat only the crisp, light-green unripe fruit. NC State says the unripe, light-green berries can be eaten raw but can have a strong laxative effect, especially when black and ripe. NC State rates the plant’s poison severity as low, lists the fruits and seeds as its poisonous parts and says the ripe berries are a strong laxative and can cause diarrhea. Clemson Extension says the green, unripe fruit is generally considered safe to eat, but the black, ripe fruit can be a laxative and should not be eaten. Eat The Weeds says not to eat dark-green or black fruit: the fruit is crisp when light green, turns mushy when dark green, and turns black as it ripens. An older field guide (Fernald and Kinsey, 1958) quotes Porcher that the seeds act as "a drastic purgative" and says "it is wise to go slow in using Melonette"; no modern source checked repeats the seed warning, but NC State lists the seeds among the plant’s poisonous parts. The Flora of North America notes that in the Gulf Coast states some fruits stay yellowish or mottled green when mature, so there, color alone may not show ripeness; check that the fruit is crisp as well as light green. No source gives a safe amount. Sources differ on how strong the effect is: the University of Florida’s Mid-Florida Research and Education Center lists the plant as non-toxic. Harmless lookalike: Clemson Extension names the Mexican sour gherkin, or cucamelon, a similar garden species whose seeds are sold, and Eat The Weeds says it has no reports of laxative problems when ripe.

Lookalikes

• Mexican sour gherkin (cucamelon) Melothria scabra harmless (may be edible)

  Clemson Extension names the Mexican sour gherkin, or cucamelon, as a similar species whose seeds are sold for gardens, while creeping cucumber seed is not usually sold. Eat The Weeds calls it close in size and use to creeping cucumber, with no reports of laxative problems when ripe. Neither source gives features that tell the two apart, but a mix-up is not dangerous.

  • Question of the Week – Creeping Cucumber (Christiana Huss, September 10, 2025) Clemson Cooperative Extension, Home & Garden Information Center
  • Creeping Cucumber: Melothria Pendula Eat The Weeds (Green Deane)

Safety flags

• Toxic parts

  NC State lists the fruits and seeds as the poisonous parts (low severity) and says the ripe berries are a strong laxative and can cause diarrhea; Clemson Extension says the black, ripe fruit should not be eaten.

  • Melothria pendula (Creeping Cucumber, Guadeloupe Cucumber, Meloncito, Speckled Gourd, Squirting Cucumber) NC State Extension Gardener Plant Toolbox
  • Question of the Week – Creeping Cucumber (Christiana Huss, September 10, 2025) Clemson Cooperative Extension, Home & Garden Information Center

ID risk

Careful

Why

The edible light-green fruit turns dark green and then black as it ripens, and NC State says the ripe berries are a strong laxative that can cause diarrhea; Clemson Extension says the black, ripe fruit should not be eaten. Pick only fruit that is crisp and light green; dark-green fruit is mushy and black fruit is ripe (Eat The Weeds; NC State). The Flora of North America says some Gulf Coast fruits stay mottled green when mature, so check firmness as well as color. No toxic lookalike is named; the Mexican sour gherkin (cucamelon), a similar garden species, is harmless (Clemson Extension).

Soil risk

low

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

When to pick

The North Carolina Natural Heritage Program says creeping cucumber blooms from June to frost and sets fruit shortly after flowering, and NC State lists summer and fall for the fruit. The Maryland Biodiversity Project shows it in fruit in Prince George’s County, Maryland, in mid-July. Pick only crisp, light-green fruit: it turns mushy when dark green and black when ripe (Eat The Weeds; NC State). No source gives DC dates, so the start, peak and end here are estimates.

Where to look

Moist thickets, stream valleys, fencerows and woods edges, where the vine drapes over shrubs and fences; logged most on the University of Maryland campus in College Park, at Cabin John Regional Park, in Glencarlyn Park, at Gulf Branch Nature Center and Park and at Lake Artemesia Natural Area. The county parks are look-only, and picking rules on the campus were not checked. The C&O Canal allows edible fruits generally but does not list creeping cucumber or say whether unripe fruit counts, and Virginia state parks do not say either, so both are ambiguous (ask the park). Otherwise pick on private land with the owner’s permission.

Habitats

disturbed ground & waste places, woods edges, trailsides & thickets, floodplain & stream-valley forest, upland oak-hickory woods, wetlands, marshes & pond edges

Most-logged places

None of the most-logged places allows picking.

Ask first: rules unclear or not checked

• University of Maryland, College Park campus

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

  Picking rules not checked.

Where you may pick

C&O Canal NHP’s compendium says edible fruits, nuts and berries may be gathered by hand for personal use but sets limits only for listed species; creeping cucumber is not listed, and the compendium does not say whether unripe fruit counts, so its status there is ambiguous: confirm with the park. Virginia state parks allow edible fruits, berries, fungi or nuts to be collected for personal or individual use (4VAC5-30-50) but do not say whether unripe fruit counts, so they are ambiguous too (ask the park). Not on Prince William Forest Park’s list. Rock Creek Park (which also runs Glover-Archbold, Battery Kemble, the western and northern Civil War Defenses forts and many small DC reservations) bans gathering any fruit, nut, berry or seed. Pick on private land only with the owner’s permission. The Maryland Biodiversity Project says creeping cucumber was once considered extremely rare and endangered in Maryland but has been removed from the state’s rare plant list; it is not on Maryland’s or Virginia’s current rare plant lists.

• C&O Canal NHP (incl. Great Falls MD, trail-side only)

  Allowed: ambiguous · no limit set for this species; by hand, personal use; confirm with the park

  C&O 2026 compendium 2.1(c)(1): 'Edible fruits, nuts, berries, and mushrooms may be gathered by hand for personal use or consumption.' The limits table that follows does not list this species, and the compendium does not say whether unripe fruit counts. 36 CFR 2.1(c)(1) requires designating 'certain' fruits, so the narrower reading (listed species only) is also possible. Confirm with the park.

• Virginia State Parks

  Allowed: ambiguous · personal/individual use only; no quantity set (state parks within ~50 km: Mason Neck, Leesylvania); individual parks may post closures

  4VAC5-30-50 bars gathering any plant without a permit, except that edible fruits, berries, fungi or nuts may be collected for personal or individual use; 'edible fruits'. The harvest is unripe fruit picked from the vine, and whether immature fruit counts is not addressed (the same question as for milkweed pods and green walnuts)

Every park’s rules

Ways to use it

• eat the crisp, light-green fruit raw out of hand as a nibble, for its cucumber flavor and aroma (Eat The Weeds; NC State; Clemson Extension)
• add the light-green fruit to salads (Eat The Weeds)
• pickles (Eat The Weeds)
• harvest only crisp, light-green fruit and leave dark-green and black fruit on the vine (Eat The Weeds; NC State)

Keeping

No source gives a storage time; eat the crisp fruit soon, or make a refrigerator pickle, because there is no tested canning recipe.

Use within

within a few days

Keeps fresh

No source gives a storage time for creeping cucumbers. Eat The Weeds says the fruit is crisp when light green but grows mushy when dark green, like an overripe cucumber, so pick only crisp fruit and use it soon.

Canning

no tested recipe: refrigerate or freeze, don’t can

Keeping basis

specific to this plant

Ways to keep it

• Pickle as researched: pickle; canning: no tested recipe — refrigerator pickle only

  Eat The Weeds says the light-green fruit can be pickled. No tested pickling recipe exists for this plant (none in NCHFP’s list). NCHFP: use only tested proportions and never alter vinegar/food/water ratios. Do not improvise a shelf-stable pickle. A refrigerator pickle is fine; do not can it.

Nutrition

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

Native or not

Maryland’s state botanist notes that Brown and Brown (1984) treated creeping cucumber as adventive (introduced) in Maryland, but that specimens collected before 1690 are in the British Museum of Natural History (Maryland Biodiversity Project); USDA and NC State treat it as native.

Origin

native

Native range

eastern & central United States south through Central America to Argentina

Virginia invasive rank

not listed

Maryland invasive status

not listed

How the ratings were set

Find

Patchy Estimate 123 = 99 research-grade iNaturalist sightings within 25 km + 22 needs-ID sightings counted in full (creeping cucumber is the only Melothria with research-grade sightings here) + 2 'cultivated' (planted) sightings (rule A); that is tier 3 by count (rule B). Rule D does not apply: the Maryland Biodiversity Project says creeping cucumber was "Once considered extremely rare and endangered in Maryland, with only four known populations", but the same page says enough populations have since been found to have it removed from Maryland’s rare plant list, so that describes its past status; the Digital Atlas of the Virginia Flora calls it "infrequent in the s. and c. Piedmont", regions of Virginia that lie outside the 25 km circle. Final tier 3.

Effort

Grab & eat Pick the crisp, light-green fruits one by one, leaving dark-green and black ones on the vine, and eat them raw or toss them into a salad; pickling them is a 2 (Eat The Weeds).

Sources

26 sources, each linked to the original.

1. List of Rare, Threatened, and Endangered Plants of Maryland (March 2026) Maryland Department of Natural Resources, Wildlife and Heritage ServiceBacks up: picking rules
2. Natural Heritage Resources of Virginia: Rare Plants (2026-Fall) Virginia Department of Conservation and Recreation, Division of Natural HeritageBacks up: picking rules
3. Rock Creek Park Superintendent’s Compendium National Park ServiceBacks up: picking rules
4. C&O Canal NHP Superintendent’s Compendium National Park ServiceBacks up: picking rules
5. Prince William Forest Park Superintendent’s Compendium National Park Service, Prince William Forest ParkBacks up: picking rules
6. 4VAC5-30-50. Flowers, plants, minerals, etc. Virginia Law Library (law.lis.virginia.gov)Backs up: picking rules
7. Account for Creeping Cucumber, Melothria pendula (Vascular Plants of North Carolina) North Carolina Natural Heritage Program (NC Parks)Backs up: description, habitat, season
8. Question of the Week – Creeping Cucumber (Christiana Huss, September 10, 2025) Clemson Cooperative Extension, Home & Garden Information CenterBacks up: description, uses, safety
9. Creeping Cucumber: Melothria Pendula Eat The Weeds (Green Deane)Backs up: description, uses, safety, season, habitat, storage, keeping
10. Melothria pendula (Creeping Cucumber, Guadeloupe Cucumber, Meloncito, Speckled Gourd, Squirting Cucumber) NC State Extension Gardener Plant ToolboxBacks up: description, uses, safety, season, native or invasive status
11. iNaturalist research-grade observations of Melothria pendula within 25 km of downtown DC iNaturalistBacks up: findability
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. Melothria pendula L. (Melonette, Creeping Cucumber, Guadeloupe Cucumber) Digital Atlas of the Virginia Flora (Virginia Botanical Associates)Backs up: habitat, findability
14. Creeping Cucumber, Melothria pendula Maryland Biodiversity ProjectBacks up: habitat, season, picking rules, findability, native or invasive status
15. USDA PLANTS Database: Melothria pendula (MEPE3), native status USDA NRCSBacks up: native or invasive status
16. Virginia Invasive Plant Species List (effective date: September 2024) Virginia Department of Conservation and Recreation, Division of Natural HeritageBacks up: native or invasive status
17. 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
18. 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
19. 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
20. Invasive Plants in the District DC Department of Energy & EnvironmentBacks up: native or invasive status
21. Melothria pendula (Weed Identification by Flower Color: yellow) University of Florida IFAS, Mid-Florida Research and Education CenterBacks up: safety
22. Melothria pendula (Guy L. Nesom), Flora of North America Volume 6 Flora of North America AssociationBacks up: safety, habitat
23. iNaturalist month-of-year histogram of research-grade creeping cucumber observations annotated fruiting within 25 km of downtown DC iNaturalistBacks up: season
24. iNaturalist week-of-year histogram of research-grade creeping cucumber observations annotated fruiting within 25 km of downtown DC iNaturalistBacks up: season
25. iNaturalist month-of-year histogram of all research-grade creeping cucumber observations within 25 km of downtown DC iNaturalistBacks up: season
26. General Information on Pickling National Center for Home Food Preservation (University of Georgia)Backs up: storage, keeping