286 XLTIII. LEGUMINOS.'E. 



perigynous or subhypogynous ; filaments froo or A'ariou?ly combined ; 

 antliers 2-celled. Ovary free, witli 1 or more ovules on tlie ventral 

 suture ; style simple, cylindrie, often declinate. Fruit a legume more 

 rarely follicular or indehiscent or breaking up into 1 -seeded joints, very 

 rai'elv fleshy and drupe-like. Seed nsually exalbuminous ; cotyledons 

 foliaceous or amygdaloid with a straight or inflexed accuinbent radicle. — 

 DiSTRiB. The second largest Natural Order of fiouering plants. Of 

 the three Suborders into which it has been subdivided, the first is 

 distributed throughout the globe, the second and third confined to 

 tropical and warm regions ; genera about 400 ; species GOOO or 7000. 



Suborder I. PAPILIONACEJE. 



Herbs, shrubs or trees. Leaves alternate, digitate or pinnate, rarely 

 1-foliolate or simple, often terminating in tendrils. Flowers irregular 

 (rarely subregular), hermaphrodite. Calyx gamosepalous, 5-toothed or 

 -lobed or the upper lobes more or less connate, or bilabiate, the 2 upper 

 lobes opposed to the 3 lower, rarely closed in bud and spathaceous. 

 Corolla papihonaceous ; petals 5, free or adnate to the staminal tube, 

 the posterior (standard) outside in bud, the 2 lateral (wings) intermediate, 

 the 2 lower inside and usually cohering by their lower margins (keel). 

 Stamens 10, diadelphous, monadelphous or free. Ovary free. Embryo 

 with an inflexed radicle. Cotyledons accumbent. 



Tribe I. GENISTEiE. Herbs or shrubs. Leaves simple or digitately 

 3-00 -foliolate. Stamens monadelphous. Pod dehiscent, not jointed. 



Anthers uniform ; keel-petals scarcely cohering 1. Rotiua. 



Anthers dimorphous; keel-petals firmly cohering. 

 Keel obtuse. 



Calyx 2-lipped 2. AnGVROLOBiuM. 



Calyx subcqually 5-toothed 3. Lotononis. 



Keel beaked. 



Pod flattened 4. Heyt.andia. 



Pod turgid 5. Crotalaria. 



Tribe II. TRIFOLIJE. Herbs. Leaves pinnately 3-foliolate, the veins 

 of the leaflets usually excurrent into teeth ; stipules usually adnate to 

 the petiole. Stamens diadelphous; filaments usually dilated at the 

 apex. Pod usually dehiscent, not jointed. 



Pod elongate, straight or recurved 0. Triconklla. 



Pod short, globose or ovoid 7. Melilotits. 



Pod spirally falcate, circinate or cochleate 8. Medicago. 



Tribe III. LOTE^. Herbs. Leaves pinnately 5-foliolate ; leaflets 

 entire. Stamens diadelphous ; filaments all or the alternate ones dilated 

 at the apex. Pod dehiscent, not jointed. 



Lowest pair of leaflets stipule-like 9. Lotus. 



Tribe IV. GALEGE-E. Herbs or shrubs. Leaves pinnate, usually 

 many- (rarely 3-1-) foliolate ; petiole not cirrhiferous. Stamens usually 

 diadelphous ; filaments filiform at the apex. Pod not jointed, usually 

 dehiscent, but if indehiscent, usiudly small, 1-2-seeded, or membranous- 

 inflated. 



