456 ENUMERATION OF LEGUMINOSAE. 
rhachin racemi solitarii, bractea subtensi et sub calyce sepis- 
sime bibracteolati. Anthere sepius biformes, 5 oblonge 
adnate, 5 breviores versatiles, in paucis generibus omnes 
subconformes. Legumen bivalve, v. rarius (in Viborgia 
paucisque speciebus aliorum generum) indehiscens. 
The simple-leaved genera and species of this subtribe are 
probably in most cases phyllodineous, the leaves being sessile, 
or nearly so, not articulate at the end of a petiole. The only 
exceptions I am aware of, occur in a few European species, 
in Lupinus villosus, and in Crotalaria unifoliolata, where the 
form of the leaflet is very different from what is observed, 
when a pinnate leaf is reduced to the terminal leaflet. Where 
there are several leaflets, they universally proceed all from 
the extremity of the petiole, at least, I have never seen in 
the most luxuriant specimens, any tendency in the leaf to 
assume the pinnate form. 
The small transverse folds or wrinkles, between the veins 
of the wings of the corolla, are more or less conspicuous in 
all the Genistee I have examined. They do not appear to 
have, till lately, attracted much attention, nor is their phy- 
siological origin or function explained ; but the constancy of 
their presence or absence in certain Papilionaceous tribes or 
 generais remarkable. Guillemin, in separating Chrysocalyx 
from Crotalaria, considered them as characteristic of his new 
genus, since then, however, their frequency among Genistee, 
has been alluded to by several botanists, and Koch is per- 
haps the first who gave them as a character of the subtribe, 
as modified by him, to the exclusion of Ononis and Anthyllis. 
Schleiden and Vogel, in their admirable paper on the develop- 
ment of the flowers of Leguminose, (Nov. Act. Acad. N at. 
Cur. v. 19. part. 1. p. 65.) have carefully described their 
structure, and given a list of several genera, where they have 
-observed them. Iam notas yet prepared to state how far 
this character may be made use of in the distinction of other 
tribes of Leguminosæ; but it appears an absolute one, sy 
between Genistee and Trifoliee. The same folds exist in 
most, if not in all, Podalyriee ; in Tephrosia and several 
