Herb with solitary pinnati-tripartite, much divided leaf, 2-3 ft. diam., appearing after the flowers, armed on pet. and nerves with prickles; pet. 3-5 ft. long, white spotted. Ped. up to ab. 3 ft. long, prickly, with 1 in. white spots; spathe 6-12 in. long, boat-shaped, convolute at base, pale purple. Spadix sessile, 4-8 in. long, without appendix; fem. part 1 in. long, purple, remainder male. Per. 0. Bahr El Ghazal Prov. (Jur: Geneina & Jur Ghattas). 744 =Colocasia Antiquorum= _Schott._ KOLOKASS—Arab; MANZI—Zande. Tuberous rooted herb, with large stoutly petioled, peltate, ovate- cordate, sagittate leaves. Originally introduced from Asia. Fung Prov.; Kordofan Prov.; Bahr El Ghazal Prov. (Niamniam-land). Cultivated for its tuber, but all parts are utilised after being well boiled to separate the acrid matter common to most aroids. 745 =Culcasia scandens= _P. Beauv._ Slender climber. Leaves lanc. to elliptic, 3-7 in. long, gland-dotted; pet. 1-3 in. long, sheathing. Ped. 1-4 at ends of branches, up to 3 in. long; spathe ab. 1½ in. long, convolute, hooded. Spadix ab. 2 in. long; fem. part ½ in. long, male 1-1¼ in.; appendix 0; per. 0. Bahr El Ghazal Prov. (Bongo: River Mokloio near Dukuttu; Jur: Geneina & Jur Ghattas); Mongalla Prov. (Lado: Doka’s). =HYDROCHARITACEÆ.= 746 =Hydrilla verticillata= _Royle._ =var. brevifolia= _Casp._ Diœcious aquatic herb; stems elongate, branched. Leaves in verticils of 4 ovate or ovate-oblong, dentate, ab. ¼ in. long; lower leaves much shorter than internodes. Male spathe 1-flowered, axillary, solitary; perianth double of 3 segments each, outer ovate, inner linear; sta. 3. Fem. spathe tubular 2-dentate; per. segments 6, narrower than male; ovary exserted beyond the spathe, long-beaked; styles 3. Bahr El Jebel (2° N.L.). 747 =Lagarosiphon Schweinfurthii= _Casp._ Aquatic herb. Leaves alt., lin.-lanceolate, ½ in. long, minutely toothed. Male spathes many-flowered; per. 2-seriate; sta. 3; staminodes often 2-3. Fem. spathe narrowly oblong, 1-flowered, with 1-3 teeth on either side; styles 3. Bahr El Ghazal Prov. (Jur & Bongo lands). =L. cordofanus= _Casp._ Leaves scattered, ½-1 in. long, linear. Male spathe sub-globose, 2-fid, 6-8 flowered. Fem. spathe axillary tubular, 2-fid. White Nile Prov. (J. Arashkol). 748 =Vallisneria spiralis= _Linn._ Submerged aquatic herb with very short stem and strap-shaped leaves, 4-18 in. long, minutely-toothed. Male spathes axillary on 1-2 in. long stalks, many-flowered; fl. trimerous, detaching themselves when fertile (as also in foregoing genera) and floating to the surface to fertilise the fem. fl. Fem. spathe tubular on long stalk rising to the surface, but withdrawing itself into the mud by spiral contraction after fertilization; stigma 3-lobed, hairy above. White Nile Prov. (12° 10′ L.N. & Goz Abu Gum’a); Bahr El Ghazal Prov. (main River); Bahr El Jebel. =V. æthiopica= _Fenzl._ Much like above, but leaves under 3 in. long.