N 
Ottelia. | CXXXI. HYDROCHARIDEÆ (WRIGHT). 7 
anthers linear, slightly shorter than the filaments. Ovary oblong, 
divided more or less completely into 6 cells by the intrusion of the 
placentas; ovules numerous; styles 6, linear, bifid——Benth. Flor. 
Austral. vi. 257 ; Hook. f. Flor. Brit. Ind. v. 662. „Stratiotes alismoides, 
Linn. Sp, Plant. 535 ; Smith, Exot. Bot. t. 15. Damasonium indicum, 
Willd. Sp. Plant. ii. 276 ; Roxb. Corom. Pl. t. 185; Bot. Mag. t. 1201. 
Nile Land. Cordofan, Kotschy ! 
Mozamb. Dist. W. shore of Lake Nyasa near Raangwa, Kirk ! 
A specimen collected by Cameron at Blantyre, British Central Africa, probably 
belongs to an undescribed species allied to this, but is in too young a state for 
determination. Also found in Tropical Asia and N. Australia. 
2. O. lancifolia, Rich. Flor. Abyss. ii. 280, t. 95. Leaves radical; 
petiole dilated at the base, subamplexicaul ; lamina elliptical-lanceolate, 
acute, gradually tapering into the petiole below, entire, membranous. 
Scape 1-flowered, shorter or longer than the leaves. Spathe tubular, 
compressed, with two opposite wings, shortly bifid. Calyx lobes 3, 
elliptical-lanceolate, obtuse, green. Petals 3, slightly longer than the 
calyx-lobes, slightly undulate in the upper half. Fruit ovoid-oblong, 
enclosed in the persistent spathe. 
Nile Land. Abyssinia: Shire, Quartin Dillon. Gazelle River, Schweinfurth, 
1159! 
Lower Guinea. Angola: Ambaca, Welwitsch, 6466 ! 
Mozamb. Dist. British Central Africa: Blantyre, Cameron ! 
Var. fluitans, Ridl. in Journ. Linn. Soc. xxii. 238, Leaves narrower, 1 ft. long, 
l4 in. wide, very gradually tapering into the petiole. 
Lower Guinea. Angola: Pungo Andongo, Welwitsch, 6468! 
3. O.vesiculata, Ridl. in Journ. Linn. Soc. xxii. 237. Acaulescent. 
Leaves lanceolate, 3—4 in. long, 9 lin. wide; petiole 3 in. long. Scape 
3-15 in. long, slightly compressed, slightly winged, a short distance 
beneath the spathe becoming incrassate and tetragonal with the angles 
acutely winged. Spathe inflated, broadly ovoid, striped with purple 
outside, 1 in. long, 7 lin. wide, bidentate at the mouth. Sepals 
lanceolate, subacute, 4 lin. long. Petals yellow, 6 lin. long. Stamens 6. 
Styles 7. Ovary incompletely 9-celled. 
Lower Guinea. Angola: Huilla, Welwitsch, 6497! 
4. O. plantaginea, Welw. ex Ridl. in Journ. Linn. Soc. xxii. 238. 
Stem short, thick, with numerous rootlets at its base. Leaves ovate, 
crisped, 4 in. long, 24 in. wide; petiole 14 in. long. Scape 10 in. long, 
flaccid. Spathe saccate, 1 in. long, with very short wings and about 10 
short, obtuse teeth. Flowers on short pedicels. Sepals lanceolate, obtuse, 
4 lin. long, green, scarious at the margin. Petals 9 lin. long, yellow. 
Lower Guinea. Angola: Huilla, Welwitsch, 6469! 
6. BOOTTIA, Wall.; Benth. et Hook. f. Gen. Pl. iii. 453. 
Spathes unisexual. Male flowers several inaspathe. Calyx-lobes 3, 
narrow. Petals 3, obovate-oblong, much larger than the calyx-lobes, 
