1886.] BOTANICAL GAZETTE. 233 
parently not on the mountains, and northward to the Columbia 
river. From the latter I have unusually large specimens, coll. 
by Suksdorf, in springy places on rocks, Columbia river, with 
flowers collected in April and fruit in May. I presume this to 
be Nuttall’s species, taken up by Durand, who well describes it 
though without the fruit, which I have well formed only from 
Suksdorf. If I mistake not it extends to St. Lawrence Bay on 
D. Henpersont. Prof. Henderson, in sending me excel- 
lent specimens of this peculiar species (collected in Tualatin plains, 
Oregon), called my attention to its character. The broad and 
similar. But the capsule is chartaceous in texture, when we 
Washington Terr., April, 1883, coll. Suksdorf, on mountain 
sides; also, but less marked, from the south side of Tamalpais, 
California, at the elevation of 2000 feet, coll. Brewer (1862), who 
notices it as quite unlike the form in the valleys below. This is 
the only species which in this revision demands a new name ; and 
it may properly bear that of the acute observer who indicated its 
peculiarity. . ie: 
5. D. rrigipum Cham. & Schlecht. in Linn. 1. 222, at least 
partly; Hook. FI. i. 119; Seem. Bot. Herald, 38.t.9. D. Mea- 
dia, var. frigidum Gray, Syn. FI. 1. ¢. The very short filaments 
in this species I find to be distinct down to the insertion in 
