Coefficient of Conservatism:
Coefficient of Wetness:
B. S. Walters
fruit & tendrils
Swamps (deciduous), floodplains, river banks, streamsides, marshy ground, thickets, borders of forests, fencerows, roadsides, railroad embankments, gravel pits, disturbed ground such as alleys and refuse areas. Sometimes cultivated as an annual vine, and some occurrences in disturbed areas by habitation may be escapes.
The thoroughly distinctive fruit is greatly inflated and watery, opening irregularly at the apex to release the seeds. Squeezing the fruit just before it is mature will eject the seeds. The contents are otherwise so unsubstantial (mostly air) that one is not tempted to use the fruit like a true cucumber, which it loosely resembles.
The calyx is very inconspicuous in this species and Sicyos angulatus, and both have soft spines on the fruit. The corolla lobes tend to be more narrowly linear-lanceolate in Echinocystis than in Sicyos.