162 
FLORA OF ADEN. 
Ovary free, stipitate, 3-sulcate. 
Capsule obscurely trigonous, 3-valved, with the valves longitudinally 
bisulcate, 8-fastigiate, 8 inches to 1 foot long, deflexed. Seeds turbinate, 
trigonous, pendulous ; testa crustaceous. 
Flowers: — January 1880 (Balfour), March 1875 (Hildebr.), March 
1878 (Perry), Dec. 1889 (DefL). 
Locality : — In rocky valleys near Steamer Point (Anders.) ; Steamer 
Point (Defl.) ; Goldmore Valley (Schweinf., Defl.) ; without locality 
(Balfour, Perry, Birdw , Marchesetti, Kuntze). 
Distribution : — Upper Egypt, Abyssinia, Nubia, Eritrea, Kordofan, 
Sennaar, South Arabia, Syria. 
Uses : — From the seeds a clear, limpid, almost colourless oil is easily 
extracted by pressure. Ben or Ban is the Arabic name for the oil. 
Commercially it is termed Ben Oil, and is highly valued as lubricant by 
watch-makers. 
XVIII.— LEG UMNO&E. 
Herbs, shrubs or trees. Leaves alternate with few exceptions, usually 
stipulate, compound ; leaflets sometimes stipellate. 
Inflorescence various. Calyx gamosepalous, 5-dentate or-lobed, or 2 or 
more teeth connate, rarely polysepalous. Corolla of 5, rarely fewer petals, 
usually irregular and imbricate in sub-orders 1 and 2, regular and valvate 
in 3. Stamens usually 10 or indefinite, perigynous or subhypogynous ; 
anthers 2-celled. Pistil 1-carpellarv ; ovary free with 1 or more ovules 
on the ventral suture ; style simple. 
Fruit a legume dehiscing by both sutures, more rarely follicular or 
indehiscent. Seeds usually exalbuminous ; cotyledons foliaceous or 
amygdaloid with a straight or indexed accumbent radicle. 
Genera about 100 ; species between 6,000 — 7,000. 
Distribution : — Throughout the globe. 
Sub-order 1. Papilionacece. 
Herbs, shrubs or trees, sometimes scandent. Leaves alternate, digitate 
or pinnate, rarely 1-foliate or simple. 
Flowers irregular. Calyx gamosepalous, 5-toothed or lobed, or 2 upper 
lobes more. or less connate, or bilabiate, rarely closed in bud and spathace- 
ous. Corolla papilionaceous ; petals 5, free or adnate to the staminal 
tube, the posterior (standard) outside in bud, the 2 lateral (wings) inter- 
mediate, the 2 lower inside and usually cohering by their lower margins 
