SOME NEW AND OTHER NOTEWORTHY PLANTS OF 
THE NORTHWEST. 
J. M. GREENMAN. 
_ SIRBA DENSIFLORA Nutt. in Torr. and Gray Fl. 1:414. 
S. betulefolia Pall. var. rosea Gray, Proc. Am. Acad. g:381. 1872. 
4 5. lucida Dougl. var. rosea Greene, Pittonia 2: 221, 1892. 
Fi S. arbuscula Greene, Erythea 3:63. 1895. 
oe This showy alpine plant, which has recently attracted con- 
: merble attention, was originally collected and characterized as 
Siren densiflora by Nuttall, whose type specimen is preserved 
: m the Gray Herbarium. The first publication of the above 
: ume, however, appears in Torr. & Gray’s Flora 1: 414, where 
the plant is briefly described as a roseate-flowered form of S. 
alia, and the name S. densiflora Nutt. MSS. cited as a syn- 
3 mvt. In Proc, Am. Acad 8: 381 Dr. Gray established a variety 
o en ? S. betulefolia Pall., based upon Hall’s no. 124, but this 
ay Pactly the same in every regard as Nuttall’s S. densi- 
6 . sh ped Bespect more perfectly characterized. In 1892 
he ne ( Pittonia 2:221) transferred the variety to S. lucida 
ad I at the same time suggesting the probability of its being 
i. Species, and later (Erythea 3:63) published the same 
arbuscula. The examination of a considerable amount of 
Prof. Greene’s view that this plant should have 
Pall, may 4 » and that it is quite distinct from S. betulifolra 
of the a on by a comparison with the excellent illustration 
eee es iin Pall. Fl. Ross, 1:33. pl. 70, Dut ee 
thoug i for discarding Nuttall’s name S. densiflora, which 
Possibilit pocny was intelligibly characterized in 1844. The 
Sug ee 5: py ramidata being the same as S. densifiora a 
Btn, by Prof. Greene in Pittonia 2 :221, bs quite out 0 
Es irae as two plants are very different in inflorescence, 
“ets, and color of the flowers. 
261 
