Whitish pubescent monœcious shrub, 2-4 ft. high. Leaves obovate or elliptic-obovate, ⅓-1 in. long, glaucous beneath. Male flower axillary, fascicled; pedicels ¾ in. long; sep. 5, minute, obovate; glands 5, fleshy; stamens 5, free. Female flower mostly solitary; sep. 4-5, ovate- elliptic, minute; disk saucer-shaped; styles 3, bipartite. Fruit depressed, globose, minute. Bahr El Ghazal Prov. (Mittu-land); Mongalla Prov. (Yei River). =P. nummulariæfolius= _Poir._ Small monœcious shrub. Leaves obovate or rounded-obovate, ¼-¾ in. long, otherwise as above. Bahr El Ghazal Prov. (Niamniam-land): Sueh River & Mt. Baginze); Bahr El Jebel (Madi). =P. pentandrus= _Schum._ & _Thonn._ Woody monœcious herb, 18 in. high. Leaves oblong-lanceolate or lin.-lanc., up to ¾ in. long. Male flower axillary in lower leaves, 2-3 together; sep. 5, ovate, glands 5, flat; stamens 5, free. Female flower solitary in axils of upper leaves; sep. and disk as male; styles shortly bifid. Capsule depressed-globose, minute. Red Sea Prov. (Suakin 21° N. Lat.); Kordofan Prov. (Rahad, Obeid, etc.); White Nile Prov. (J. Arashkol); Bahr El Ghazal Prov. (Shambé). =P. amarus= _Schum._ & _Thonn._ Monœcious herb, 1 ft. high. Leaves oblong or elliptic, ⅙-½ in. long; one male and one female flower in each leaf axil. Male flower sep. 5, ovate, minute, glands small; stamens 3, filaments connate. Female flower sep. larger than male; disk 5-lobed; styles 3, short, bifid. Capsule depressed 3-lobed. Bahr El Ghazal Prov. (Jur: Jur Ghattas). =P. maderaspatensis= _Linn._ Erect monœcious herb or undershrub; flower branchlets almost winged. Leaves lin.-lanceolate or oblanceolate, up to 1½ in. long; stip. lanceolate and auricled about ⅛ in. long. Male and female flower sometimes together in leaf axils, or female solitary, much larger than males; ped. 1/12 in. Male flower, sep. 6, oblong-lanceolate, minute; disk-glands 6, flat; stamens 3, filaments connate. Female flower, sep. 6, 2-seriate ovate-elliptic; disk of 6 flat glands; styles 3, bifid. Capsule 3-lobed, ⅛ in. diam. Nubia (between Suakin & Berber); Kassala Prov. (Gallabat: woods north of Matamma); Fung Prov. (Roseires & Jongol’s Post); White Nile Prov. (J. Arashkol); Kordofan Prov. (Abu Haraza); Upper White Nile Prov. (Meshra El Zeraf southwards); Bahr El Ghazal Prov. (Niamniam-land). An infusion of the leaves is used for headaches. Cattle eat the leaves. =P. prostrata= _Welw._ Small prostrate, monœcious herb. Leaves elliptic, spinescent at apex, ¼ in. long. Male flower axillary and geminate in lower parts; sep. 6, oblong, minute; glands 6, orbicular; stamens 3, filam. connate. Female flower solitary in upper parts; sepals 6, in 2 rows oblong; disk annular; styles 3, bifid. Capsule depressed globose, ⅙ in. diam. Khartoum Prov. =P. odontadenius= _Muell. Arg._