1906] NELSON—ROCKY MOUNTAIN PLANTS 53 
leaves small, mostly basal, oblong-spatulate, minutely hispid-ciliate: 
flowers few, in a crowded glomerule at summit: calyx minutely 
glandular-pubescent, its whole tube adnate to the carpels: petals 
broadly obovate-cuneate, truncately rounded at summit, twice as 
long as the calyx lobes, distinctly divergently 3—-nerved: the distended 
subglobose calyx-tube papillcse-rugose from the pressure upon it by 
the numerous brown seeds within. 
This is the rare and troublesome little alpine plant of the middle Rocky Moun- 
tains which has been referred to S. adscendens L., an arctic plant from which it 
Seems to be distinct. The other names which it has also borne are S. petraea 
L. and S. controversa Sternb., both of which seem to refer to S. adscendens ie 
and are furthermore both encumbered by synonyms through their application 
to other very distinct species. Therefore it seems best to take up Rafinesque’s 
name, under Ponista (P. oregonensis Raf. Fl. Tellur. 2:66.1836), as there can 
be no doubt as to its application to our plants. 
SAXIFRAGA SUBAPETALA normalis, n. var.—Very similar to the 
Species, but petals evident, elliptic-spatulate, as long as the calyx- 
lobes: as in the species the carpels are immersed in a crest-margined 
disk which persists at the middle of the mature carpels as an 
undulate ridge. 
For the description of the species see Erythea 7:169. 1899. This has been 
distributed by various collectors either as S. integrifolia or as S. Sierrae, from 
both of which it is quite distinct. 
Parthenocissus laciniata (Planch.), n. comb.—P. quinquejolia 
Jaciniata Planch. in DC. Mon. Phan. 5:449. 1887; P. vitacea 
(Knerr) A. S. Hitch., Sp. Fl. Man. 26. 1894. 
Prunus ignotus, n. sp.—Shrubby or possibly becoming tree-like: 
branches slender, none of them becoming indurated or thorny: 
leaves glabrous from the first, simply and sharply serrate: flowers 
white, appearing with or after the leaves, solitary or 2-3 in a cluster: 
‘calyx turbinate; its lobes entire, glabrous within and nearly so with- 
Out: petals obovate: fruit not known. 
It is a little singular that no one has reported this in fruit, but the fine speci- 
mens distributed by Prof. C. S. Crandall, as P. pennsylvanica, from the banks 
“of the Cache la Poudre, near Ft. Collins, Colo., May 1897, cannot well be ignored. 
Philadelphus intermedius, n. sp.—A low branching shrub with 
‘dark green glabrous aspect: leaves short petiolate or subsessile, 
