FLORA OF ADEN. 
101 
Flowers axillary, pedicellate. Sepals glandular-setose. Petals some- 
what lanceolate with a thickened scale-like appendage at the base. 
Stamens 4. Ovary oblong or oval, shortly and densely glandular, 
sessile or subsessile, with a very long slender style. 
Fruit oval, 4-5 lines long, with setose-hispid concave valves. Seeds 
reniform-globose, rather compressed, minutely granular. 
Locality : — Great valley between Steamer Point and town 
(Marchesetti) . 
Distribution : — Nubia, Abyssinia, Egypt, Sinai, Central and Southern 
Arabia. 
Note : — Marchesetti is the only botanist who reported this species 
from Aden, and we have included it on his authority. As Cleome 
pruinosa Anderson and Cl. quin quener via DC. resemble very much Cl. 
droserifolia , we are perhaps allowed to doubt the actual occurrence of 
CL droserifolia at Aden. 
3. Dipterygium Dene, 
A twiggy, divaricately-branched undershrub. Leaves small, 
petioled, scattered, ovate-oblong, acute, entire. 
Flowers small, in long bracteate racemes ; pedicels short, filiform. 
Sepals small, ovate, acute. Petals white, ovate, obtuse, shortly clawed. 
Stamens 6, equal. Ovary 1-celled ; ovules 1-2, often 4- winged, the 
wings afterwards disappearing ; style elongate ; stigma capitate. 
Fruit indehiscent, small, pendulous, ellipsoid, compressed, surrounded 
by a membranous wing, 1 -seeded. Seeds erect, curved ; cotyledons 
concave, embryo incumbent. 
Species : — 1 . 
Distribution : — Nubia, Abyssinia, Kordofan, Central and S. Arabia, 
N.-W. India. 
1. Dipterygiuiil glaucum Dene, in Ann. Sc. Nat. Ser. 2, IV, 67, 
tab. 3 ; Anders. Journ. Linn. Soc. Y, Suppl. p. 1 ; Boiss. FI. Or. I, 417 ; 
Hook, et Thoms, in Journ. Linn. Soc. Y, 179 ; Oliv. FI. trop. Afr. I, 
70. 
Pteroloma arabicum Hochst. et Steud. in Schimp. PI. Arab. Fel. 
n. 851. 
Character of the genus. 
Flowers: — Dec. 1847 (Hooker), Dec. 1888 (Schweinf.), January 
1863 (Oliver and Cl.), March 1878 (Perry), April 1861 (Thomson), 
May 1859 (Anderson). 
