CORIOSPERMUM VILLOSUM n. sp.
Stem 2-4 dm. high, much branched from near the base, the branches divergent, striate, when young with the leaves and bracts villous with many branched hairs, in age glabrate ; leaves linear, 2-4 cm. long, 1-3 mm. wide, cuspidate-mucronate ; spikes rather dense, with more or less imbricated bracts ; lower bracts linear lanceolate, 5—To cm. long, the upper ovate-acuminate and cuspi date, 4-5 mm. long and about 3 mm. wide with broad scarious margin; achene mm. long and 2 mm. wide, acutely margined but scarcely at all winged.
The following specimens belong to this species: Montana : P. A. Rydberg, no. 2623,1895, from Manhattan, in flower. Colo rado: Isabel Mulford, from Salida, in fruit. S. Watson, no. 993, from Carson Desert, Nevada, 1867, seems also to belong here.
There are at least three species of Car/aspen/win in the United States, viz.: C. Ityssopifoliunt L. with a low branching stem, more or less pubescent when young, very dense spikes with imbricated bracts, which are all broadly ovate, generally over 5 mm. long, and large
achenes about mm. long and with broad wing margins It ()Tows around the Great Lakes and northward to the Arctic and westward to Washington.
C. nitiduin Kit (C. hyssopifoliunz microcaipum Vats.), with tall slender perfectly glabrous stem, ascending branches, lax spikes, whose bracts are not overlapping each other and are much nar rower and shorter, 3-4 mm. long and generally narrower than the small, 2 mm. long, broadly winged achenes. I have compared the American form with the European and cannot find any character by which to separate it. It grows from Texas, Kansas, Nebraska to Arizona and Washington (?).
C. villosum, described above, which resembles C. hissopifollum in the spikes and the low branching, and C. nitidztm in the size of bracts and achenes and narrow leaves, but differs from both by the lack of the wing margin and by the longer pubescence.