216 FLORA OF TEXAS. 



scattered appressed hairs ; leaves thick, smooth above, the 

 lower ones oblong, the upper linear ; racemes long, 5-10- 

 flowered ; stems 12-18' high ; racemes 6-12' long ; Jloiu- 

 ers distant. Perennial. 



LUPINUS. Lupine. 



Calyx 2-lipped, 5-toothed; vexillum with the sides re- 

 flexed; heel falcate, acute ; stamens monadelphous, with 

 alternate anthers oblong and roundish ; capsule oblong 

 compressed, many-seeded ; the seeds often separated by cel- 

 lular partitions. — Herhs, with simple or palmately 5-many 

 foliolate leaves, and showy flowers in terminal racemes. 



L. viLLOSUS, Willd. Biennial ; villous and hoary; stems 

 thick, prostrate or ascending; leaves simple, lanceolate-ob- 

 long, mostly acute, long-petioled ; stipules linear subulate, 

 elongated, adnate below to the petioles; racemes erect, 

 densely many-flowered ; floiuers pale red, the vexillum 

 dark purple in the center ; legume very woolly. Stem 

 l°-2° long ; leaves, with petiole, 6'-8' long. 



MEDICAGO, L. 



Calyx 5-cleft, the lobes subulate or setaceous ; corolla 

 deciduous ; vexillum longer than the partly united wings 

 and keel; stamens 10, diadelphous (9 and 1), equal; style 

 smooth ; legume woolly ; steins l°-2° high ; leaves 2'-4' 

 long. 



M. LUPULINA. Pubescent; stem -procumbent ; leaflets 

 obovate, toothed ; stipules nearly entire ; spikes globose, 

 many-flowered ; flowers minute, legume reniform, 1 -seeded, 

 black. Annual ; stem l°-2° long. 



TRIFOLIUM, L. Clover. 



Calyx 5-cleft, the teeth subulate or setaceous ; corolla 

 withering or persistent ; the keel shorter than the wings. 



