72 The Flowering Plants of Western India. 



flowers from the first. The plants of the sub-order Papili- 

 oriaceae are very easily recognized by the flowers, which are 

 all more or less like those of the common pea, while the 

 fruit in this, as well as in the other sub-orders, is a pod. 



Hooker, in mentioning the absence of leguminous plants in a 

 certain part of the Himalayas, says that " c.ol, equable, humid 

 climates are generally unfavourable to the order." Journals 76. 



Dr. Cooke notices as remarkable that there is not a single tree of 

 the order at Mahableshwar, though several at Matheran. 



General description of the order. Leaves very, often com- 

 pound, with stipules, the leaflets frequently with stipels, sepals 

 5, often unequal, petals 5 : stamens generally 10, free or 

 variously combined (but in tribe Acacieas they are in- 

 definite) ovary superior, style simple, fruit usually the pistil 

 grown into a pod, with the calyx attached, but very various in 



I. SUB-ORDER PAPILIONACEJS. Flowers papilionaceous (butter- 

 fly shape), consisting of a large upper petal (the standard), 

 which embraces the rest in the bud, 2 lateral petals (wing*), 

 and two usually more or less coherent by their lower margins 

 (the keel), which enclose the stamens and pistil; stamens 

 almost always 10, and monadelphous or diadelphons. 



The sub-order is further divided into a large number of 

 tribes distinguished mostly by the divisions of the leaves, and 

 the nature of the pod. 



(a) GENISTEJ;. Stamens monadelphous ; leaves simple or 

 digitately trifoliate. 



1. HEYLANDIA. Stamens united into a tube, split above, 

 style long, pod short, ovate compressed, one or two-seeded. 



2. CROTALABTA. Flowers generally yellow, style long, 

 bearded above, pod straight, generally inflated. 



(b) TRIFOLIEJB. Stamens diadelphous, leaves trifoliate, 

 leaflets toothed. 



3. TRIGONELLA. Flowers yellow, standard and wings narrow, 

 keel shorter, pod many-seeded. 



4. MELILOTUS. Flowers in long racemes, style much 

 incurved, pod short, round or oblong, indehiscent. 



5. MEDICAGO. Pod spirally twisted, indehiscent. 



(c) GALEGE^E. Stamens usually diadelphous ; leaves 

 various. 



6. CYAMOPSIS. Stamens monadelphous, pod linear straight, 

 divided internally by partitions. 



