NEW OR NOTEWORTHY SPECIES. 219 
region which it inhabits, I find it in none of the herbaria, 
and suppose that I alone have collected it. 
TRIFOLIUM SUBSALINUM. Also near T. variegatum, seem- 
ing much stouter, but the stems hollow, flaccid and weak, 
prostrate, from a few inches to two feet long: leaflets all 
obovate or obovate-oblong, mostly about 2 inch long, obtuse, 
none emarginate, obviously serrulate: peduncles slender, 
twice as long as the leaves: heads nearly $ inch broad; la- 
einiate involucre only slightly lobed: calyx much as in the 
last, but the teeth almost wholly scarious: pods not ex- 
serted: seeds more elongated, and darkened in color by 
more copious purple dots. 
This is another ultramontane ally of 7. variegatum ; and 
while more like that species in the characters of its leaflets 
and calyx, it is far removed from it by its thick but soft 
hollow stems and branches. By this character it has misled 
some of the authorities. Mr. Watson sometimes mistook it 
for “ T. involucratum,” though its root is certainly annual. 
Its habitat is the muddy shores of subsaline ponds and 
pools, in various parts of the Great Basin from Western 
Nevada to Wyoming, and it is in the herbaria from many 
collectors. 
The group of which T. tridentatum is typical will ultimately 
prove an extensive one. Lindley’s original diagnosis of the 
type is vague enough to cover all plants having the triden- 
tate calyx-segment. Very notable segregates are the T. ob- 
tusiflorum and T. majus remarked upon already in this paper. 
Another most excellent species is 
T. ACICULARE, Nutt. in T. & G. Fl. 319. Its perfect va- 
lidity as a species was recognized by me while studying 
Nuttall's type,in the British Museum in 1894; and I had | 
in my possession fine specimens of recent collection from 
Santa Barbara Co., Calif., as well as one from San Bernar- 
dino Co., with comments by Mr. Parish upon it as distinct 
