CATALOGUE. 
17 
linear, crowded at the base ; those of the stem scattered, sessile ; silique linear, 
flat, nearly straight, pendulous, acute ; stigma sessile ; seed broadly winged. 
— The specimens differ from Nnttalfs in the erect or spreading, not pen- 
dulous siliques, in the more narrowly margined and less flattened seeds, and 
in the rather broader leaves ; but it seems best to refer them here, as the 
following variety with both ascending and pendulous pods, a widely winged 
seed, and much broader leaves, would indicate that the differences were 
within specific limits. The stems are less than & high, numerous from a 
many-branched woody base ; flowers few, pale purple ; pod 1 J' long, about 
1" broad. East Humboldt Mountains, Nevada; 8-10,000 feet; July, Au- 
gust. (70.) 
Var. LATiFOLiA. As described under the last. Clover Mountains, Nevada, 
and Uinta Mountains, Utah ; 12,000 feet altitude. The Uinta specimen, 
but for the seeds in the young pod being strictly in one row, would be placed 
with the alpine A. Drum?nondii from the same locality. (71.) 
ArAbis longirostris. Annual, glabrous, glaucous, diffusely branched; 
radical leaves ovate-spatulate, cauline ones linear-lanceolate, narrowing to 
the base, entire or sparingly toothed ; calyx of the small loosely racemed 
reflexed flowers a little shorter than the corolla ; siliques linear, short- 
pedicelled, reflexed, beaked with the long narrow style ; seeds in one series, 
rather narrowly margined. — Stem l^ig^b inuch branched ; branches 
virgate and somewhat naked ; flowers 1 J" long, light pink, calyx purplish ; 
pods 1^-2' long, less than a line broad, the narrow beak J' long. Growing 
in alkaline soil at the Steamboat Springs near Washoe City, about Humboldt 
Lake, Nevada, and on Stansbury Island, in Salt Lake ; 4,500 feet altitude ; 
May, June. Plate I. Fig. 1. A plant of the natural size, but under the 
average of the species. Fig. 2. A flower ; enlarged four diameters. Fig. 3. 
A pod ; natural size. Fig. 4. A seed, showing the embryo ; enlarged four 
diameters. (72.) 
Arabis perfoliata. Lam. {Turritis glabra^ L. T. macrocarpa^ Nutt.) 
From the Northern States to the Arctic Circle, and west to the Pacific and 
Northern California ; also collected by Fendler in New Mexico. Found in 
the West Humboldt Mountains, Nevada, and in the Wahsatch ; 5-6,000 feet 
altitude; May, June. (73.) 
Arabis Drummondii, Gray. A very variable S2>ecies ; stem either strict 
or slender and flexuous; glabrous, with a slight ciliation upon the petiole of the 
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