Echinocystis
Fl. N. Amer. 1: 542. 1840.
Taxon | Illustrator ⠉ | |
---|---|---|
Brandegea bigelovii Echinocystis lobata Echinopepon wrightii | Yevonn Wilson-Ramsey Yevonn Wilson-Ramsey Yevonn Wilson-Ramsey |
Plants annual, monoecious, climbing or trailing; stems glabrate; taprooted with branching secondary-roots or roots slender-fibrous; tendrils 3-branched. Leaves: blade depressed-orbiculate to suborbiculate or ovate, palmately (3–) 5 (–7) -lobed, lobes triangular to oblong-triangular, margins entire or serrulate-cuspidate, surfaces eglandular, glabrous or scabrous. Inflorescences: staminate flowers 50–200 in axillary racemes or racemoid panicles; pistillate flowers 1 (–3) from same axils as staminate, peduncles erect at apex; bracts absent. Flowers: hypanthium shallowly cupulate; sepals (5–) 6, filiform, almost pricklelike; petals (5–) 6, connate 1/4 length, white to greenish white, narrowly triangular to linearlanceolate or oblong-lanceolate, 3–6 mm, minutely glandularpuberulent, corolla rotate. Staminate flowers: stamens 3; filaments inserted at corolla base, connate, column 0.4 mm; thecae connate, forming subsessile capitate androecium but not fused into single ring, sigmoid-flexuous, connective broad; pistillodes absent. Pistillate flowers: ovary 2-locular, subglobose; ovules 2 per locule; style 1, nearly vestigial; stigma 3, forming a subglobose head; staminodes absent. Fruits pepos, light green to blue-green, globose-ovoid to ovoid or ellipsoid, bladdery-inflated, symmetric, dry, thin-walled, surface moderately to densely echinate, spinules weak, flexible, whitish-glaucous with green mottling at bases, dehiscence apically irregularly lacerate, sometimes explosively. Seeds 4, broadly oblong-ellipsoid, strongly flattened, not arillate, margins not differentiated, surface slightly pitted-roughened. x = 32.
Discussion
Species 1.
Selected References
None.