Stemless. Leaves all radical, 2–8 or more in. long, 1–4 lin. broad, linear, subacute or somewhat obtuse, flat, thin, many-nerved, glabrous. Peduncles 1–6 to a plant, 5–12 in. long, 2/3–1 lin. thick, 7-ribbed, glabrous, their basal sheaths 2–4 in. long, oblique at the mouth, acute, glabrous. Heads monœcious, with the male flowers in the centre, 3–4 lin. in diam., hemispherical or subglobose, white-villous. Involucral-bracts in 4–5 series, glabrous, entire, light brown; innermost 1–1 1/4 lin. long, 1/2 lin. broad, obovate-oblong, obtuse; outermost orbicular often broader than long. Flowering-bracts about 1 lin. long, 1/4– 1/3 lin. broad, linear-oblanceolate or cuneate-oblong, acute, light brownish or fuscous, densely bearded with white hairs on the apical part. Receptacle glabrous. Female flowers very numerous, pedicellate. Sepals 3, subequal, 3/4–1 lin. long, 1/6– 1/4 lin. broad, oblong or cuneate-oblong, boat-shaped, obtuse, very pale brownish-white, hyaline, bearded with long white hairs on the apical part. Petals arising slightly above the sepals, 3/4 lin. long, very narrow, linear, obtuse, whitish, hyaline, rather densely bearded with long white hairs, glandless or one of them with a very minute black gland at the apex. Ovary trigonous; style trifid to 2/3 the way down. Male flowers pedicellate. Sepals 3, free, 1/2 lin. long, linear, obtuse, whitish, densely bearded with white hairs. Stipes between the sepals and petals 1/4 lin. long. Petals 1/4 lin. long or less, oblong, obtuse, whitish, densely fringed with white hairs, and with a black gland just below the apex. Anthers white. Capsule 1/3 lin. in diam. Seeds ellipsoid, apiculate, brown.
Robust aquatic perennial; capitula densely white-papillose, to 14 mm. diam.
Lib.: Mouth of Loffa R., Grand Cape Mount (Dec.) Baldwin 10946! Genne Tanyehun, Grand Cape Mount (Dec.) Baldwin 10091! Kakatown Whyte! Nimba (Dec.) Adames 808!
Port. G.: Boé, Madina (Feb.) Pereira 2999!
Mali: Banankoro (Mar.) Chev. 524! Sikasso (May) Chev. 803!
S. L.: Afzelius! York (Apr.) Adames 206! Tawia Deighton 1031! Gbangabatok (Jan.) Capstick in Hb. Deighton 5301! Magbema (Mar.) Jordan 427! Farangbaya Crisp Al! Bandakafaia (Oct.) Jaeger 8096!
Sierra Leone in a rivulet near Vatemba Road, Barter! in a rivulet near Freetown, Don! and without precise locality, Vogel!
Guin.: Conakry (Jan.) Dalz. 8247! Dalaba (Oct., Nov., Mar.) des Abbayes 699! Adames 416! Langdale-Brown 2638!