CATALOGUE, 43 



boldt Mountains, Nevada, and the Wahsatch ; usually subalpine ; 5-10,000 

 feet altitude ; May-August. (180.) 



Claytonia umbellata. Root tuberous, rounded; leaves orbicular 

 or somev^^hat rhomboidal, the radical on long petioles, the cauHne a single 

 pair on petioles equaling the blade ; flovt^ers 3-5, in a terminal umbel; ped- 

 icels unequal, shorter than the leaves; sepals and petals obtuse. — Among 

 rocks; Mt. Davidson and Truckee Pass, Nevada; 5-7,000 feet altitude; 

 April, May. Plate VI. Fig. 4: a plant; natural size. Fig. 5: A flower, 

 laid open; enlarged tvpo diameters. (181.) 



Claytonia arctica, Adams. DC. Prodr. 3. 361. Root fusiform ; leaves 

 fleshy ; radical ones petioled, subspatulate, the cauline opposite, sessile, ovate ; 

 raceme secund ; flow^ers large, the petals obovate, subemarginate. Var. mega- 

 EHIZA, Grray. Armr. Jour. Sci., {n. s.,) 33. 406. With the cauhne leaves lance- 

 olate or linear-spatulate ; raceme subsessile. Very variable in size of leaves 

 and flovpers ; the former 1-6' long and 2-12" in width, and the petals 2-6" 

 long. Rocky Mountains of Colorado. Uinta Mountains, Utah ; 11,000 feet- 

 altitude; August. (182.) 



Claytonia peefoliata, Don. Stems and leaves numerous from an 

 annual fibrous root ; radical leaves on slender petioles, broadly rhomboidal, 

 the cauline pair united into a single nearly orbicular perfoliate leaf; raceme 

 fascicled, sessile ; petals entire or slightly emarginate. — Stems 2-8' high ; 

 flowers small, white. On the Pacific slope, from Alaska to Southern Cali- 

 fornia, and in the Rocky Mountains. Found abundantly near Carson City, 

 and in the Trinity and West Humboldt Mountains, Nevada, and by Prof 

 Eaton in the Wahsatch, near Salt Lake City, which is the most southern 

 and eastern known locality •; 5,000 feet altitude ; April-June. (183.) 



Claytonia Chamissonis, Esch. & Ledeb. (C. aquatica, Nutt.) Stems' 

 erect or decumbent, stoloniferous and rooting at the joints ; roots bulbiferous ; 

 leaves opposite, spatulate or oblong-obovate, attenuate below, rather obtuse ; 

 racemes apparently axillary, peduncled, simple, few-flowered ; petals obovate, 

 entire, twice longer than the calyx. — Stems becoming 1° in length ; leaves 

 1-2' long ; flowers white, rather large. California to Alaska and eastward 

 in the Rocky Mountains to Colorado. Truckee Valley, Havallah Range, and 

 Battle Mountain, Nevada, and in the Wahsatch and Uintas ; 5-8,000 feet 

 altitude; May-July. (184.) 



