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Apodanthera undulata

Apodanthera undulata A. Gray

Melon Loco

Cucurbitaceae (Cucumber Family)



USDA Native Status: L48 (N)

A malodorous, grayish, hairy plant with long, coarse, prostrate stems bearing tendrils, kidney-shaped leaf blades, and yellow, funnel-shaped flowers. The mature melons are green and have raised, longitudinal ridges.

The melons taste so bad you would have to be loco to eat one.


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Plant Characteristics

Duration: Perennial
Habit: Vine
Leaf Arrangement: Alternate
Fruit Type: Pepo
Size Notes: Trailing up to 10 feet.

Bloom Information

Bloom Color: Yellow
Bloom Time: May , Jun , Jul , Aug , Sep


Native Distribution: Southern Arizona east to western Texas and south to Mexico.
Native Habitat: Sand dunes, gravelly flats, grasslands, and roadsides.

Growing Conditions

Water Use: Low
Light Requirement: Sun
Soil Moisture: Dry


Warning: Plants with the word loco ("crazy") in their common names are usually poisonous to some degree, and should not be ingested by humans or animals; several contain behavior-altering toxins.
Conspicuous Flowers: yes

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Apodanthera undulata in USDA Plants
FNA: Find Apodanthera undulata in the Flora of North America (if available)
Google: Search Google for Apodanthera undulata


Record Modified: 2023-05-31
Research By: TWC Staff

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