eemneineittinataiatiaie tain ia 
Boi) DIADELPHIA. DECANDRIA. 
Has. Onsand-hills, on the banks of the Missouri, not far 
from the confluence of the river Platte. Flowering in May. 
Psoralea longifolia Pu. 2. suppl. p. 741. See Herb. Lam- 
‘bert. Ons. Roots perennial, filiform, creeping. Stems nearly 
‘simple, terete below and angular above. Stipules con 
nate, distinct from the petioles, ovate, acute, below lan- 
ceolate, acuminate above. Leaves singularly elongated, 
much like those of Indigofera flifolia of the Cape of Good 
Hope; the lowest shortest, often trifoliate, above they are 
sometimes bijugate (or in 5’s), the uppermost simple, 
. scarcely a line wide, and nearly a spanlong. Racemes 1 
,  or2inthe same axill, 7 to 10-flowered; flowers somewhat 
remote, pale red, nearly as large, but shorter, than 
those of O. sylvaticus; calix and bractes subulate. Vexil- 
lum rather broad, stamina diadelphous. Style and minute | 
subcapitate stigma smooth. Legume linear-lanceolate, 
exserted, flatly compressed, smooth, 8 to 10-seeded. 
Certainly a very extraordinary species of Orobus, yet in- i 
separable in genus from the preceding; both these -spe- F 
cies appear to be somewhat allied to Tephrosia, but the | 
stamina are diadelphous, and the whole habit and fruit is 
different from the American species of that genus. 
 Orobus is principally an European genus extending, 
however, into Siberia and Northern Africa; O. fruticosus 
of Peru is scarcely a congener. 
496. ere a) EL. (Vetchling, Everlasting 
flat, broader above and villous on the 
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