24a. Raceme opposite to leaves; inner sepals oblong to ovate, at right angle to petals, apical appendage stalkless; capsule winged ................................................................... 3. P. arillata
24b. Raceme at top of plant; inner sepals obliquely ovate, not at right angle to petals, apical appendage stalked; capsule not winged.
25a. Leaf blade lanceolate to elliptic-lanceolate, < 20 X 7 cm; lateral petals oblong, apex nearly truncate, inside glabrous at base; capsule obcordate to globose, 1--1.4 cm in diam. 4. P. forbesii
25b. Leaf blade (TEXT SAYS OVATE NOT OBOVATE) ovate, > 25 X 8 cm; lateral petals broadly elliptic, apex rounded, inside barbate at base; capsule broadly ovoid, ca. 1 cm in diam. 5. P. barbellata