FLORA OF ADEN. 
207 
Description — Perennial, hoary and scabrid. Stem rather stout, 
angled, rigid, beset with short white prickles. Leaves | — 2 inches in 
diameter, coriaceous, very variable, oblong, rounded or cordate, subentire 
or more or less deeply 3 — 5-lobed, lobes obtuse, quite entire or toothed, 
petioles rather short. Tendrils short, rather rigid. 
Male flowers ; Calyx campanulate, shortly scabrid. Connective 
shortly produced into a broad glandular appendage. Female flowers : 
Ovary covered with short stout prickles. 
Fruit on very stout peduncles, 1 ^ — 3 inches long, broadly ovoid, 
rounded at both ends, covered with scattered, thick, conical tubercles or 
spines. Seeds small, -J inch, whitish, smooth, elliptic-oblong, without 
thickened border or depressed disk. 
Fruits : — February (Thomson). 
Locality : — Aden (Hooker, Thomson, Schweinf.). 
Distribution : — Yemen, Eritrea, Highlands of Somaliland, Abyssinia. 
Note: — J. I). Hooker, who collected C. pustulatus at Aden in 1847 
and 1851, says that the fruit of the Aden specimen is scabrid as well as 
aculeate, which is not the case in others from Arabia Petraea. 
2 . Citrullus Schrader, 
Perennial herbs, usually trailing. Tendrils 2 — 3-fid, rarely undivided. 
Leaves deeply 3 — 7-lobed, the lobes usually lobulate. 
Flowers rather large, yellow, monoecious, solitary. Male flowers i 
Calyx-tube broadly campanulate ; lobes 5. Corolla 5-partite beyond 
the middle, subcampanulate ; segments oblong-ovate, obtuse. Stamens 
3, filaments short, free; anthers scarcely cohering, one 1-celled, the others 
2-celled, the cells linear, flexuose, the connective# not produced. Pollen 
smooth. Rudimentary ovary glanduliform. Female flowers : Calyx 
and corolla as in the male. Rudimentary stamens 3, setose or ligulate. 
Ovary ovoid, 3-placentiferous ; ovules oo, horizontal ; style short ; stigmas 
3, thick, reniform. 
Fruit globose or ellipsoid, smooth, fleshy, indehiscent. Seeds very 
many, much compresfed, smooth. 
Species 3. 
Distribution : — Eastern Mediterranean region, Tropical Africa, 
Western Asia. 
1. Citrullus colocy li this (L.) Sehrad. in Linnsaa XII, (1838), 
414; Am. in Hook. Lond. Journ. Bot. Ill, 276 ; Anders. Journ. 
Linn. Soc. Y, Snppl. p. 20; Boiss. FI. Or. II, 759 ; Naud. in Ann. 
Sc. Nat. ser. IV, XII, 99 ; Oliv. FI. trop. Afr. II, 548 ; Batt, 
et Trab. FI. d'Alg. p. 332. 
K 
