WESTERN PLANT STUDIES. I 
AVEN NELSON AND J. FRANCIS MACBRIDE 
[The last four numbers of “Contributions from the Rocky Mountain 
Herbarium” (IX—XII) were based largely upon the collections made by Mr. J. 
Francis MACBRIDE in toro and by MAcBRIDE and myself in 1911. During 
the season of 1912, the field work was continued by MaAcsrivE assisted during 
a part of the time by Mr. Dorman Bennirtt and by the writer. The territory 
covered was a small part of southwestern Idaho and certain parts of Nevada in 
and adjacent to the Humboldt National Forest. Our work in Nevada was 
greatly facilitated by the kindly assistance of the Forest Service, and we wish 
to acknowledge gratefully the many courtesies extended by Supervisor C. 
SIDNEY TREMEWAN and his assistants and foresters. The types, the numbers 
of which are given, were all collected by Netson and MacsrinE and are 
deposited in the Rocky Mountain Herbarium. 
In working up the collections of 1912, Mr. MAcBRIDE has been associated 
with me, and the paper presented herewith is the result of this collaboration. 
This and other papers that we may publish jointly will be under the above 
title; while those for which I individually assume responsibility will be con- 
tinued as “Contributions, etc.’”,—AVEN NELSON. | 
Calochortus bruneaunis, n. sp.—Stems striate, minutely sca- 
brous in lines, especially near the base, 2-4 dm. high, more or less 
tortuous: bulb narrowly oblong, covered with brown, dead scales, 
as is also the base of the stem: leaves several (4-6); the radical leaf 
nearly or quite equaling the plant; the cauline involute, expanded 
and scarious-margined at the sheathing base, 4—10 cm. long: flowers 
1-3, axillary in the upper leaves: sepals rather broadly lanceolate, 
2-3 cm. long, tapering gradually to a slender tip, colored like the 
petals within, green without but with a broad white scarious margin 
to above the middle: petals broadly obovate-cuneate, rather 
abruptly rounded above into a blunt point, longer than the sepals; 
body-color white, delicately streaked with green, with a green band 
from apex to the narrow yellow claw, just above which is a small 
purple inverted y-shaped or lunate blotch: petal wholly glabrous, 
even the small oblong gland at the summit of the short claw scarcely 
pubescent: anthers obtuse, purple, 6-8 mm. long, about equaling 
the filaments: capsule narrowly oblong. 
Botanical Gazette, vol. 55] [372 
