GENERA OR FAMILIES. 31 



9. Polygalaceous Plants. Polygalace^. 



(30) Polygala — two inner sepals wing-like ; petals three to five 

 adhering to the tube of the stamens, the lower one keeled. 



10. Leguminous Plants. Leguminos^. 



* Stamens monadelpTious (\. e. in one parcel) . 



(31) Ulex — calyx elongated deeply two-lipped yellow, the upper 



lip with two, the lower with three small teeth at the tips. 



(32) Genista — calyx short two-lipped, the upper lip larger two- 



parted, the lower deeply three-toothed. 



(33) Sarothamnus — calyx short two-lipped, the upper with two, 



the lower with three small teeth at the tips. 



** Stamens diadelpTious (i. e. in two parcels), 

 t Pod (or legume) continuous, one-celled. 



(34) Trifolium — legume few (1-4) -seeded, scarcely longer than 



the calyx ; leaves trifoliolate. 



(35) Vicia — legume many-seeded, two-valved; leaves pinnate, 



tendrilled. 



tt Pod (or legume') divided hy transverse articulations into 

 one-seeded cells. 



(36) Arthrolobium — flowers umbellate, without bracts ; legume 



terete, scarcely contracted at the joints. 



(37) Hippocrepis — flowers umbellate, without bracts ; keel acu- 



minated ; legume much flattened, of numerous joints each 

 curved like a crescent or horseshoe, or having one margin 

 plane the other concave. 



(38) Ornithopus — flowers umbellate, bracteated; keel obtuse; 



legume compressed, the joints equally contracted on both 

 sides. 



