ZoRNiA. LEGUMINOS.'E. 353 



37. KENTROPHYTA. NiUt. mss. 



"Calyx campanulate, deeply o-cleft; the segments nearly equal: vexillura 

 oblong, reflexed : keel-petals obtuse, cohering along the back, shorter than the 

 wings. Ovary with 3-4 ovules. Legume partly included in the calyx, ovate, 

 1-celled, coriacco-membranaceous, 1-2-seeded. — Perennial dwarf and ca^spi- 

 tose canescenlly pubescent herbs, diffusely branched. Stipules more or less 

 cohering with each other. Leaves pinnately 3-7-foliolate : leaflets linear, in- 

 articulated and persistent, rigid, and spiny at the tip. Flowers small, ochro- 

 leucous, axillary, 2-3 together, subsessile." 



1. K. montana (Nutt. ! mss.) : " stipules scarious, cohering about half their 

 length ; calyx pubescent with dark and white hairs. 



0. "more densely leafly, Avith smaller leaflets. 



"Hills of the Platte, in naked places. — Stems intricately branched and 

 forming circular mats. Leaves very numerous; leaflets nearly half an inch 

 lung and less than a line wide (in 0. only 3-4 lines long), almost subulate, 

 when old rigidly divaricate, as in Ulex Europffius. Stipules spiny at the tip 

 like the leaves. Flowers almost sessile, about 3 lines long. Keel broad, tip- 

 ped with purple : wings oblong, about one-third longer than the keel : vexil- 

 lum Avith the limb reflexed almost at right angles to the short claw. Stamens 

 diadelphous. Legume pubescent, projecting a little beyond the calyx, dehis- 

 cent, compressed. Seed mostly solitary, nearly the size of the legume, dark 

 brown." Nuttall. 



2. K. viridiii (Nutt. ! mss.) : stipules herbaceous, distinct nearly to the 

 base ; hairs of the calyx all white. 



" With the preceding, which it greatly resembles ; but a larger plant and 

 less canescent." Nuttall. 



Tribe VL HEDYSARE.E. DC. 



Corolla papilionaceous. Stamens either monadelphous or diadel- 

 phous (9 & I, or 5 & 5), rarely distinct : anthers sometimes of 2 forms. 

 Legume (loment) transversely divided into several indehiscent 1 -seeded 

 joints, occasionally reduced to a single 1-sceded cell. Embryo incurv- 

 ed or sometimes straight. — Erect or procumbent herbs or shrubs. 

 Leaves abruptly or unequally pinnate or pinnately 2-3-foJiolate, or 

 rarely palnjately 2-5.foliolate, occasionally reduced to a single leaflet, 

 sometimes stipellate. Lnflorescencc axillary or terminal, racemose, 

 spicate, or umbellate. 



38. ZORNIA. Gmel. ; Michx. fl. 2. p. 76 ; DC. prodr. 2. p. 316. 



Calyx campanulate, bilabiate; upper lip obtuse, emarginate ; the lower 3- 

 cleft. Corolla inserted into the bottom of the calyx : vexiUum orbicular, the 

 sides revolute : keel-petals lunulate, cohering at the back. Stamens mona- 

 delphous, alternately shorter ; anthers alternately oblong and globose. Le- 

 gume compressed, 2-5-jointed ; the joints roundish, usually hispid. — Herba- 

 ceous and mostly annual plants. Leaves petioled, palmately 2-4-foliolate. 

 Stipules sagittate; lower ones lanceolate; the upper ones larger, supplying 

 the place of bracts. Flowers sessile, yellow, each with 2 bracteiform sti- 

 pules at the base. 



45 



