i 
108 PITTONIA. 
TRIFOLIUM DECODON. Size of the foregoing and nearly — 
allied, the slender branches firmer, purplish: leaflets all 
broad and short, few exceeding } inch long, many much 
shorter, obcordate to cuneate-obvate and oblong cuneiform, 
emarginate to retuse, truncate or nearly obtuse in the upper- 
most, all with about 5 minute but salient teeth jn each mar — 
gin; slender wiry peduncles more than twice the length of — 
the leaves : heads 4 inch broad at flowering, the corollas dark- 
purple ; divisions of involucre 7 or 8, oblong or oval : calyx- 
teeth short, subulate-setaceous; corollas widely inflated in age. ; 
Collected by Brandegee at San Diego, Calif., 20 May, 1908, _ 
and distributed by C. F. Baker under n. 3371. Species re- 
markable among members of this section of Trifolium for 
its broad and short leaflets. 
_ The type specimens of all these new clovers are in my C 
own herbarium. n 
CHAMÆCRISTA CAMPORUM. Annual, stout, erect, simple oF : 
with two or three suberect branches, commonly 2 or 3 feet 
high, very leafy and floriferous, nearly glabrous: leaves 
large; leaflets 9 to 13 pairs, oblong, 3 to 2 inch long, obtuse, — 
sharply mucronate, not notably venulose, glabrous except 
as to the very minutely and rather obscurely scabrous — 
serrulate margin: flowers fascicled and numerous; buds of 
oblong-lanceolate outline, short-acuminate, the sepals 
strongly pilose up and down the midvein, otherwise glab- — 
rous: corollas more than an inch broad, golden-yellow: 
growing ovaries densely but rather coarsely villous; pods 
about 23 inches long, straight, with a short curved beak, | 
the margins pilose-pubescent. 
Abundant in certain localities, in rich prairie soil, from 
central Illinois northwestward to southern Minnesota; the — 
type specimens collected by myself at Monticello, Ilinois S 
7 August, 1899. a 
