SPECIES OF TRIFOLIUM. 5 
species, and of a pale dove color in the second; hence the 
specific names. 
T. rRIFLORUM. Annual, glabrous, a span high with a few 
slender but firm ascending branches: leaves short-petioled ; 
leaflets 3—5 long, linear-cuneiform, denticulate, truncate or 
retuse at apex, and cuspidate: stipules spinulose-lacerate : 
peduncles filiform, several times longer than the leaves, sup- 
porting a minutely involucrate 3-flowered umbel: involueres 
parted into 5—6 subulate segments which little exceed the 
short pedicels of the flowers: calyx broadly tubular, 2 lines 
long, scarious and at length transparent between the ten 
prominent nerves, the equal, triangular-acuminate, entire, 
pungent teeth one-third as long as the tube: corolla small, 
purplish, not becoming inflated: legume 2 lines long, glab- 
rous, 2-seeded. 
A single specimen, by Mrs. Curran, from near Mt. Diablo, 
1883, mixed with T. bifidum, which it well resembles, although 
it belongs near T. pauciflorum. 
T. Ruspyt. Near T. longipes: stems numerous, rather 
stout, decumbent, a foot high from a deep, somewhat fusiform 
perennial root: sparingly villous-pubescent : leaflets obovate 
to narrowly oblong, an inch or less long, obtuse, mucronate, 
serrulate, deep green above, pale beneath: spike oval or 
oblong, bracts of the rachis not bristly: flower salmon color, 
distinctly pedicelled and in age reflexed: calyx-teeth linear- 
lanceolate, villous-pubescent. 
Northern Arizona, collected by Lemmon and by Rusby : 
also in the San Bernardino Mountains, Southern California, 
Parish. Well distinguished from T. longipes to which it has 
been referred, by its stout thick perpendicular roots, the pal- 
lid lower surface of its leaves and different inflorescence. 
The roots of T. longipes are slender and creeping; its head 
or spike is round-oval, the flowers sessile and never reflexed, 
and the rachis has bristly bracts. This is probably the 
