Flora of North America species comparison

pubescent or glabrescent.

unifoliolate;

stipules broadly lanceolate, 1–2 mm;

petiole 3–4 cm, glabrous;

blade broadly ovate to suborbiculate, 60–160 × 60–160 mm, 2-lobate 1/4–1/3 length, base cordate, 11–13-veined, apex of each lobe rounded, surfaces sparsely puberulous abaxially, glaucous, glabrous adaxially.

3–8-flowered; mostly subterminal;

bract and bracteoles triangular, minute.

0.5 cm.

buds fusiform, 3–4 mm;

hypanthium tubular, 15 mm;

petals white or purple, obovate, subequal, 40–55 mm;

fertile stamens 5;

filaments shortly connate basally with staminodes, 20–40 mm;

anthers 7 mm;

staminodes 1–5, 2–3 mm;

gynoecium arcuate, nearly equaling stamens;

ovary pubescent (mainly on sutures), style and gynophore glabrous;

stigma capitate.

stipe 15 mm;

linear, 200–300 × 20–25 mm.

10–25, brown, subglobose, 1–15 × 15 mm;

funicular aril lobes subequal, 1 mm.

aculeata consists of two subspecies.

typical subspecies, to which our material is referred, naturally occurs 0–1700 m in open, tropical deciduous forests.

grandiflora (Jussieu) Wunderlin, which occurs in Bolivia, Ecuador, and Peru, is distinguished by larger leaves (to 120 mm) and by flowers with a conspicuously elongated hypanthium (10–)20–50(–80) mm.