=J. pilosa= _H. B._ & _K._ ARKALA (Meshra El Zeraf)—Arab; LŪNG (Meshra El Zeraf)—Dinka. Differs little from _J. diffusa_ Forsk. except by its erect habit and more hirsute young parts. Fung Prov. (Jongol’s Post); White Nile Prov.; Upper White Nile Prov.; Bahr El Ghazal Prov. (Jur Ghattas); Bahr El Jebel (Madi). =J. acuminata= _Sw._ Stems glabrous. Leaves lanceolate subacute, 3-4 in. long, ½-1 in. broad, glabrous or nearly so, pinnately several nerved. Fruits wrinkled, 1 in. long. Khartoum Prov.; Bahr El Ghazal Prov. (Niamniam-land: by the Linduku Stream); Fung Prov. (Jongol’s Post). =J. villosa= _Lam._ Erect herb, 4 ft. high; stem woody, somewhat winged, hairy above. Leaves alternate, linear to lanceolate, ½ to 5 in. long. Flowers 4-merous, solitary, yellow, sessile, small. Capsule up to 2 in. long. Nuba Mts. Prov.; Bahr El Ghazal Prov. (Jur-land). =J. villosa= _Lam._ =var. linearis= _Jacq._ Erect, hirsute herb. Leaves narrow linear; fibres of old capsules persistent. Nuba Mts. Prov. (Kadugli); Mongalla Prov. (Gondokoro). =J. linifolia= _Vahl._ SOFSAF (N. Kordn.) & TOTO—Arab. Erect herb, 2 ft. or more; stem narrowly winged. Leaves linear- lanceolate 1-3 in. long. Flowers small, yellow, 4-merous, sessile, axillary. Capsule cylindrical, 2/3 in. long. Khartoum to Berber (banks of the Nile); Atbara; Blue Nile Prov.; Fung Prov. (Jongol’s Post); Kordofan Prov.; Bahr El Ghazal Prov. (Wau). 134 =Ludwigia jussioides= _Lam._ Erect herb, 2-3 ft. high. Leaves linear-oval to lanceolate, 1½-4 in. long, alternate. Flowers axillary, yellow, up to 1 in. in diam.; 4-5-merous. Capsules 1 in. long and 1/12 in. diam. Bahr El Jebel (Madi). =L. parviflora= _Roxb._ Erect annual, 6-18 in.; stem often angular. Leaves linear-lanceolate to lanceolate, tapering to base, ab. 1½ in. long. Flowers tetramerous, yellow. Capsule under ½ in. long, cylindrical, somewhat inflated, 4-veined. Kordofan Prov. (Abu Gerad); Bahr El Ghazal Prov. (Bongo-land: Addai). 135 =Trapa bispinosa= _Roxb._ CHUWALAGEIR (Kenissa)—Dinka. Water Chestnut. Aquatic herb; stems ascending in water, giving off numerous pectinate roots. Leaves alternate, floating petioles dilated into floats; blades triangular, broadly dentate on upper edges. Fruit ab. 1 in. long, shield-shaped, armed with 2 curved, barbed spines. Bahr El Ghazal Prov. (Main River); Bahr El Jebel (Sudd). Although it is not known in the Sudan as edible the fruit is much used in India as an article of food and is eaten raw or cooked. 136 =Epilobium hirsutum= _Linn._ Erect herb, hirsute, 2-5 ft. high. Leaves opposite, linear-lanceolate, serrulate, amplexicaul, 1-5 in. long. Flowers sessile, axillary, solitary; calyx tube narrow, elongate, 4-lobed; petals 4, pink or purple; stamens 8; stigma 4-lobed. Capsule 2-3 in. long. Darfur Prov. (J. Marra). =HALORRHAGACEÆ.= 137 =Laurembergia Engleri= _Schindler._