20 



BOTAKY. 



Nevada, (rare,) and in the Wahsatch and Uintas; 7,000 feet altitude; 

 June-September. (79.) 



Caedamine hiesota, L. The Atlantic States to Florida, and from Canada 

 to Colorado and Northern California, northward to the Arctic Sea. In the 

 Wahsatch and Uinta Mountains, Utah, and in Goose Creek Valley, North- 

 eastern Nevada ; 6-7,000 feet altitude ; June-September. (80.) 



Platyspeemum^ scapigeeum. Hook. Annual, low, (2-3' high,) glabrous; 

 leaves radical, runcinate-pinnatifid ; scapes numerous, 1-flowered; petals 

 white.— Collected by Douglas and Gayer on the Columbia River Now found 

 at the Steamboat Springs, near Washoe City, Nevada. In fruit ; May. (81.) 



Vesicaeia MONTANA, Gray. Proc. Acad. Phil, March, 1863, p. 58. 

 Hoary, with a silvery pubescence ; root perennial ; stems diffuse, decumbent, 

 leafy ; leaves spatulate, radical ones subovate, petioled, sometimes with 1-2 

 teeth ; raceme elongated in fruit ; pod oval or oblong, pubescent, longer than 

 the slender style, and a little longer than the spreading curved pedicel. — 

 Seeds 2-6 in each cell, wingless ; petals spatulate, light yellow ; filaments 

 filiform. Subalpine ; found by Hall & Harbour in Colorado ; not rare in 

 the East and West Humboldt Mountains, Nevada, and in the Wahsatch ; 

 9-10,000 feet altitude ; June-August. (82.) 



Physaeia^ didymocaepa, Gray. {Vesicaria, Hook.) Eadical leaves 

 broadly obovate-spatulate, occasionally lyrate ; cauline lanceolate-spatulate, 

 mostly entire ; siliques large, globose-didymous, deeply emarginate above and 

 below. — A low decumbent profusely branched perennial ; the showy oblong- 

 spatulate petals exceeding the oblong sepals ; silicles varying in size, (2-6" in 

 diameter,) the lobes usually approximate, sometimes considerably divergent ; 

 the septum ^-1^" long. From Colorado to Oregon and north to lat. 57°. In 

 the East and West Hurnboldt Mountains, Nevada, and in the Wahsatch and 

 Uintas ; 6,500-9,000 feet altitude ; June, July. (83.) 



Deaba alpina, L. Somewhat rigid; scapes naked, mostly somewhat hir- 

 sute ; leaves spatulate-lanceolate, plane, more or less pilose with branching 

 hairs; petals (yellow) more than twice the length of the calyx; silicles some- 

 what corymbed, oblong-elliptical ; style very short. — North Greenland and 



' PLATYSPEEMUM, Hook; Sepals equal, spreading. Petals obovate, suljsessile. Pods orbicular, 

 much compressed, with a hyaUne septum ; valves flat ; stigma sessile, simple. Seeds few, orbicular, with 

 a broad margin and slender seedstalk ; cotyledons accumbent.— A low annual. Benth. & Hook. 



=PHYSAEIA, NuTT. Characters as in Vesimna, (to which it is referred by Benth. & Hook.,) but 

 the silicle didymous, much inflated, membranous ; the cotyledons contrary to the narrow septum. 



