4) CONTRIBUTIONS TO WESTERN BOTANY 
Mimosa Mazatiana n. sp. o, 224.J,  Mazailan, Mx. 
Nov. 20 1922. A prostraie annual, setesely hairy with yellew 
and appressed-pubeacent hairs throughun. except the puberuleut 
faces of the pods. Leaflets abont 10 pairs, on 2 pinnw, acuiish, 
4-6 mm, long, 2 mm. wide, collapsing easily, pinnae 1-2) imeires 
long. Stems with scattered and recurved prickles Jods in heads, 
oval to oblong, not over } cm, long by 4 mm. w.de, 1-3 seedse 
with joints easily permitting separation of the sides. Collected 
there by Mrs Mexia, also from Urcguay. 
assiasbsusL, N. 27191. La Burranca, Gaadalajara, Nov, 
23 1930, Perenuial, 2 ft. long or more, subdecumbent, raceniose- 
ly branched above. Leaves thin, 2-4 inches lung, on filiform pet- 
lles 2-3 inches long, of 2 pairs of oval-obovate and rouuded leafl- 
eta, al) oblique, rounded and entire, an inch lo: g, rather triple- 
nerved below, about sessile, smooth, paripinnate, the upper ones 
with s.ngte flowers in the axils on jedicels filiform and 3 mm. 
long. Flowers yellow, 4-6 mm. long, with the calyx cleft alinost 
rot stipitate, vetch-like, 4-seeded. with flattened, oval-obovate 
seeds 3 mm. long and with about 10 faint lines of shallow pits, 
glistening-black, Valves opening slong the dorsal suture and 
curting up as in Vicia but plants without tendrils. 
assia tenuicaulis n. sp. In ditches at Guadalajara, 
Mex. Nov, 26 1930, A vory slender perennial(?), 2-3 ft. high, 
Stems striate-angled. Leaflets 20-25 pairs, rigid. overlapping, 
linear, very sharply and obliquely acute, nearly smooth except on 
the margins, 3-nerved from the very base, 4-6 mm. long, Flowers 
in short racemes, very small and with large bracts. Pods an inch 
long, conspicnously constricted much as in Dosmodium. Leaf 
rachis hispid with hairs pustulate at base, 
astellata n. sp. No, 27196, Cacachilla mts. L. 
Cal., Oct.2 1930 and at Triunfo, No. 27200, Oct. 7 An open- 
branched shrub about 6 ft, high, appearing 1 
ous throughout, but not at all glutinous, but densely yellow-stel- 
late. Leaflets about 3 pairs(2-5), 1-2 inches long, laneeolate and 
shortly acuminate to elliptical and apiculate, rather oblique below, 
thickish and entire, with leaf rachis 1-2 inches long and about 
i y st . 
festly constricted between the seeds both vertically and laterally, 
flattened, short-stipitate and apiculate, narrowly linear. 
