182 EBYTHEA. 



Trifolium pinetorum. Allied to T. involucratum^ but 



strictly annual, with many nearly or quite prostrate branches 

 a foot long or more, with long internodes and not at all 

 flexuous : petioles ^ to 1 inch long ; lowest leaflets only ^ inch 

 long, obcordate, those of the middle of the stem oblong- 

 obovate, obtuse, the uppermost 1 inch long or more and from 

 somewhat rhombic-oblanceolate to obovate-oblong, denticulate 

 to spinulose-serrulate : peduncles much exceeding the leaves; 



heads i inch broad at flowering, | inch in fruit ; involucre 



small, parted to the base into a number of subulate setaceous- 

 pointed divisions : calyx-tube campanulate, lO-nerved, 1 to 1| 

 lines long, the teeth fully 3 lines long, slenderly aristi- 

 form, from a triangular-subulate base: corolla little surpassing 

 the calyx-teeth, whitish or flesh-color, but the wings almost 

 black at the tip. 



Common on gravelly banks or dry stony beds of streams in 

 the region of pine forests among the mountains of southern 

 New Mexico, adjacent Arizona and Mexico, and the only clover 

 of that district ; very peculiar in its habitat, abundantly dis- 

 tinct from T. involucrahim (under which name I distributed 

 it), always annual, flowering in autumn. 



Trifolium lacerum. Of the involucrate series, near T. 

 variegatum and annual : branches decumbent or nearly pros- 

 trate, slender, very flexuous and the internodes short: petioles 

 scarcely ^ inch long ; leaflets 1 inch long, linear-lanceolate, 



cuspidately acute, fimbriate-lacerate : peduncles short, though 

 exceeding the leaves : heads barely ^ inch broad ; involucre 

 small, lacerately cleft: tube of the calyx 1 line long, campanu- 

 late, 10-veined, with no transverse veinlets ; teeth 2^ lines 

 long, subulate below the middle, thence tapering to a long 

 aristiform tip : corolla red-purple, surpassing the calyx. 



In springy places, "Valley of the Sierra de Las Animas," 

 in southern Colorado or northern New Mexico, Charles 

 Wright, n. 997. Species referred to T. involucrafum in the 

 Planice Wrighiiance^ which was not a good guess, as the plant 

 is certainly annual, and nearer T. variegaiiim^ though easily 

 distinct from that also. 



