LEGUMINOS^. 83 



DIVISION II, CHOKIPETAL^B PERIGYNJE. 



Petals mostly distinct. Calyx more or less distinctly synsepalous, and 

 stamens perigynous. 



OBDEB XXXIII. LEGUMIN(>S/. 



Herbs, shrubs or trees with alternate, stipulate, compound (in Siliquas- 

 Irum simple) leaves; leaflets mostly entire, the upper, in some genera, 

 converted into tendrils. Sepals more or less united and forming a 2 5- 

 toothed or -cleft cup, the odd tooth or segment inferior. Petals 5 

 (sometimes by abortion fewer), more or less united above the base; the 

 two lowest joining to form the keel; the two lateral enfolding this and 

 called the wings; the uppermost one broader than the others, usually 

 erect, but in the bud folded over the other (except in Siliquastrum) and 

 called the banner; the corolla as a whole papilionaceous, or butterfly- 

 shaped. Stamens usually 10, distinct or diadelphous (9 and 1), or 

 monadelphous. Pistil 1, usually becoming a legume, i. e., a 2-valved 

 1 -celled pod with 1 row of seeds; these attached to the upper suture, and 

 containing no albumen, the large embryo filling the integuments. 



* Unarmed shrubs. 



Leaves broad, simple SILIQUASTRUM 1 



unequally pinnate, leaflets many AMORPHA 6 



few, 1-foliolate; branches reedy SPARTIUM 15 



3-foliolate, not aromatic CYTISUS 13 



*' glandular and aromatic PSORALEA 8 



palmately 5 9-f oliolate LUPINUS 16 



* * Spinescent or prickly shrubs or trees. 



Leaves unequally pinnate; leaflets many , PSEUDACACIA 7 



' all in the form of spine-like green organs ... ULEX 14 



" 1 3-foliolate; branchlets spinescent XYLOTHERMIA 17 



* * * Herbaceous plants. 



Leaves equally pinnate, tendril-bearing; 



Style villous all around at apex VICIA 2 



" *' lengthwise on one side LATHYRUS 3 



Leaves unequally pinnate; fl. capitate or racemose; 



Pods commonly inflated, not prickly ASTRAGALUS 4 



" oblong, prickly GLYCYRRHIZA 5 



Leaves of 1 oc often unequally distributed leaflets; 



fl. in an umbel often with a bract at its base LOTUS 9 



f fl. in slender racemes MELILOTUS 11 



pods coiled or curved MEDICA 12 



Leaves pmnately 3-foholate -j capitate, yellow TRIFOLIUM 10 



i. herbage dotted, aromatic PSORALEA 8 



Leaves palmately 3-foliolate \ fl ' ca P itate or umbellate TRIFOLIUM 10 



<fl. racemose, yellow THERMOPSIS 18 



Leaves palmately 5-9-f oliolate J cal y* bilabiate LUPINUS 16 



< herbage dotted, aromatic PSORALEA 8 



