212 CLI, ALISMACEE (WRIGHT). [ Echinodorus. 
as long as the filaments. Ovary obliquely obovoid, compressed ; style 
rostrate. Achenes many in a subglobose head, obliquely obovoid. 
much compressed, 1 lin. long, lateral ridges inconspicuous; style 
aristate. Seed with a thin, almost smooth testa.—Micheli in DC. 
Monogr. Phan. iii. 55, 952; Durand & Schinz, Conspect. Fl. Afr. v. 
488. Alisma humile, Kunth, Enum. iii. 154; Benth. in Hook. Niger 
Fl. 528. 
Upper Guinea. Senegal, Perrottet,75! 811! Roger,58! Senegambia: near 
Richard Toll, Leliévre, Leprieur. 
Wile Land. White Nile ; on the banks of the river, near Gebel Nyemati, 
Schweinfurth, 1032! Aba (Abbah) Island, Schweinfurth, 991 ! 
5. RAUTANENTA, Buchen. in Bull. Herb. Boiss. v. 854. 
Flowers unisexual. Sepals 3, persistent. Petals 3, marcescent. 
Stamens hypogynous, 7, 8, or 9, sometimes more or less connate in 
pairs. Carpels 7-9, l-ovuled. Achenes irregularly capitate. Seed 
erect; embryo horseshoe-shaped.—An erect, rush-like perennial. 
Inflorescence paniculate ; flowers small, verticillate. 
Endemic, monotypic. 
1. R. Schinzii, Buchen. in Bull. Herb. Boiss. v. 855. Rhizome 
thick ; rootlets filiform, white. Leaves 1 ft. long, 2 lin. wide, linear or 
linear-lanceolate, flat, 3-nerved, acute. Scape about as long as the 
leaves, erect, terete, striate when dry; panicle with ternate branches ; 
bracts subulate, the lowest 10 lin. long; flowers dicecious, odorous. 
Sepals broadly ovate, obtuse, 2 lin. long; margins white, membranous. 
Petals half as long as the sepals, reniform-orbicular, marcescent, thin, 
white. Stamens 7-9 ; filaments linear-subulate, white; anthers yellow, 
oblong, basifixed, dehiscing longitudinally. Carpels obovoid, compressed. 
Achenes semiorbicular, with three strong ridges running nearly round 
each carpel ; style persistent, subapical, hooked. Seeds erect, much 
compressed, smooth.—chinodorus Schinzii, Buchen. in Bull. Herb. 
Boiss. iv. 413, and App. iii. 10. 
Lower Guinea. German South-west Africa; Amboland; Omulonga, Raw- 
tanen, 51, Ombalambuenge, Rautanen, 159! Olukonda, Rautanen, 222! 
6. BURNATIA, Micheli; Benth, et Hook, f. Gen. Pl. iii. 1007. 
Flowers dicecious, small. Male flowers: Sepals 3, marcescent. 
Petals 3, much smaller than the sepals. Stamens 9, inserted at the base 
of the petals; filaments subulate; anthers linear-oblong, as long a 
the filaments, dorsifixed near the base. Rudimentary carpels about 12, 
hatchet-shaped. Female flowers: Perianth-segments 3, small, orbicular, 
membranous, erect after flowering. Stamens 0, or 1-2 imperfect. 
Carpels about 12, crowded on a small receptacle, obliquely semiorbicular ; 
stigma ventral, sessile, papillose; ovule solitary, basal, anatropous- 
Achenes 6-8, obovate-orbicular, compressed, dorsally 3-ribbed ; stigm@ 
