254 LEGUMINOS^. (pulse FAMILY.) 



or inflated, teeth 5, equal or somewhat unequal. Standard various. 

 Keel obtuse, rarely acute, never acuminate-cuspidate ; claws of wings 

 and keel free or nearly so, more or less adnate to the staminal tube . 

 Style generally beardless, sometimes bearded, stigma naked, rarely 

 bearded. Pod sessile or stipitate, varying much in form, bivalved, gen- 

 erally inflexed at the dorsal suture so as to be completely or incom- 

 pletely 2-celled, often however quite 1 -celled, the ventral suture rarely 

 inflexed, in which case it may touch the inflexed dorsal suture — An- 

 nual or perennial herbs or shrubs, the leaves odd-pinnate, or, if abrupt- 

 ly pinnate, the petiole elongated, unarmed or spinescent. 



SERIES A. MONOCARPICA. ANNUALS OR BIENNIALS. 



* Hairs fixed hy their middle or above their dase. 

 1 A. Arabicus, 2 epiglottis. 



* * Hairs simple^ fixed at base. 



t Stipules free. 



X Flowers in heads. 



% Valves of pod Tceelless. 



3 A. tribuloides, 4 pseudostella, 5 cruciatus, 6 radiatus, 7 triradia- 



tus, 8 Schimperi. 



§ § Valves of pod Iceeled. 



9 A. oxy glottis. 



\ X Flowers racemed, or racemed-capitate, 



I Pods linear, iTwre or less strongly curved. 



IT Stigma bearded. 



10 A. eremophilus. 



IT IT Stigma not bearded. 

 II Pods glabrous. 



11 A. corrugatus, 13 tenuirugis. • 



II II Pods pubescent. 



13 A. Damascenus, 14 trimestris, 15 Gyzensis, 16 commixtuSj 17 

 hispidulus, 18 callichrous, 19 annularis. 



§ § Pods oblong, thick, slightly curved. 



20 A. Bseticus, 21 aulacolobus, 22 conduplicatus. 



t t Stipules, or at least the lower, connate. 



X Pod linear-terete, falcate or hooked. Leaflets glabrous above. 



23 A. hamosus, 24 brachyceras, 25 Dorcoceras, 26 canaliculatus. 



X X P(^^ linear -lanceolate or oblong, straight or slightly curved. 

 27 A. tuberculosus, 28 bombycinus, 29 Berytheus, 30 peregrinus, 

 31 leucophseus. 



SERIES B. PERENNIALS. 



Sect. I. Hairs simple, fixed at base. 



* Fruiting calyx not inflated. 

 t Herbs loith unarmed petioles, subsessile usually capitate fiowers, deciduous 



