1Inflorescences unbranched; flowers densely crowded in spaced, sessile clusters.
1'Inflorescences thyrsoid.
2Lamina lanceolate to ovate-lanceolate, usually glabrous below
2'Lamina broader, mostly broadly ovate, pubescent below.
3Young stems bearing short hairs interspersed or not with long, straight spreading hairs; sepals of male flowers only shortly connate.
3'Young stems bearing only long, straight, spreading hairs; sepals of male flowers united for at least half their length.
4Lamina not peltate
4'Lamina peltate.
5Petiole inserted 1-5 mm from basal margin of lamina.
5'Petiole inserted more than 6 mm from basal margin of lamina.
6Lower surface of leaves tomentose; upper surface with a very dense, raised reticulation
6'Lower surface sparsely hairy; upper surface with a very lax, scarcely raised reticulation
7Lamina 15-21 cm long. Male inflorescence with rhachis and branches stiff and straight, the flowers in congested peduncled cymes. Endocarp bearing 2 rows of c. 8 transverse ridges.
7'Lamina 7.5-12.5 cm long. Male inflorescence very slender and flexuose, the flowers in lax cymose clusters without obvious peduncles. Endocarp bearing 4 rows of c. 14 papilliform tubercles
8Flowers male.
8'Flowers female.
9Calyx glabrous or subglabrous; petals free
9'Calyx puberulous.
10Petals free
10'Petals connate
11Flowers clearly spaced in lax clusters.
11'Flowers tightly crowded in subglobose heads; carpels tomentose
12Young carpels glabrous or subglabrous
12'Young carpels puberulous