270° BOTANICAL GAZETTE [APRIL 
The species here proposed seems to belong in the A. adscendens group. 
In habitat and aspect, however, it reminds one more of Erigeron glacialts. 
After trying for some time to find in the recognized Rocky Mountain species 
a near ally, I now offer it, with some hesitancy as a new species. The type 
is no, 7924, from alpine summits in the Medicine Bow Mountains; Albany 
co., Wyo., August 2, Igoo. 
/ Xylorrhiza scopulorum, n. sp.—A low shrub 3-4" high, the 
woody base branched and naked: branches with a glistening 
white bark, glabrous except for a tuft of wool at the old leaf- 
scars: young branches herbaceous, greenish, leafy throughout, 
sparsely lanate and above viscid-glandular, monocephalous: 
leaves oblong-lanceolate, green and herbaceous, lightly lanate- 
pubescent and glandular-dotted, spinulose-dentate, the lower 
short-petioled, the uppermost reduced to lanceolate bracts: heads 
with the expanded rays about 4%™ broad: involucral bracts many, 
linear-acuminate, about 1°™ long, minutely viscid-pubescent: rays 
numerous, white or light-blue, 3-toothed: disk flowers very numer- 
ous, slender-tubular, about 5™"™ long, and four times as long as 
the short-cylindrical merely canescent akenes; pappus as long 
as the disk corollas. 
This species is to be distinguished from X. tortifolia (T. & G.) Greene, 
its nearest ally, by its less rigid, wholly herbaceous, not at all contorted 
leaves, which are not in the least incised (only bordered with small spinulose 
teeth); by the presence of some viscid-glandulosity upon leaves, young stems, 
and involucre; by the leafiness of the peduncles; and by the color of the 
rays. Type specimens from rocky cliffs at “The Pockets,” southern Nevada, 
April 30, 1902, by Mr. Goodding, no. 669. 
- Erigeron glacialis, n. comb.— Aster glacialis Nutt. Trans. Am. 
Phil. Soc. 7:291; T. & G. Fl. 2:155; Erigeron salsuginosus glactals 
Gray, Syn. Fl. 17:209. 
I think we shall do well to allow Nuttall’s conception of the rank of this 
plant to stand. 
- Erigeron nauseosus, n. comb.—Z. caespitosus nauseosus Jones, 
Proc. Cal. Acad. Sci. II. 5:696. 
The specimens distributed by Mr. Jones (no. 5586) bear out nner the 
fairly complete description cited. 
- Hymenoclea fasciculata, n. sp.— Stems shrubby, several to 
many, spreading, simple, leafless, striate, with light yellowish- 
