CATALOGUE. 43 
boldt Mountains, Nevada, and the Wahsatch ; usually subalpine ; 5-10,000 
feet altitude ; May-August. (180.) 
Claytonia umbellata. Eoot tuberous, rounded ; leaves orbicular 
or somewhat rhomboidal, the radical on long petioles, the cauhne a single 
pair on petioles equaling the blade ; flowers 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 two diameters. (181.) 
Claytonia arctica, Adams. DC. Prodr. 3. 361. Root fusiform ; leaves 
fleshy ; radical ones petioled, subspatulate, the cauline opposite, scssil*', ovale ; 
raceme secund ; flowers large, the petals obovate, subemarginate. Y-dv. mixja- 
ehiza, Gray. Amer. Jour. Sci., {n. s.,) 33. 406. With the cinilijic leaves Ia)i('<;- 
olate or linear-spatulate ; raceme subsessile. Very varia1)le in size of leaves 
and flowers ; the former 1-6' long and 2-12'' in width, and the petals 2-11" 
long. Rocky Mountains of Colorado. Uinta Mountains, Utah ; 11,000 feet 
altitude; August. (182.) 
Claytonia perfoltata, 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 j^erfoliatc leal"; raecmc 
fascicled, sessile; petals entire or shghtly emarginatc. — Stems high; 
flowers small, white. On the Pacific slope, from Alaska io Soniheni Cali- 
fornia, and in the Rocky Mountains. Found abundantly near Carson City, 
and in the Trinity and West Humboldt Mountains, Nevada, an<l hy l*r<»f 
Eaton in the Wahsatch, near Salt Lake City, which is the most soutliern 
and eastern known locality ; 5,000 feet altitude ; April-June. (183.) 
Claytonia Chamissonis, Esch. & Ledeb. (C. aquatka, Nuft.) Stems 
erect or decumbent, stoloniferous and rooting at the joints ; rools hiilhil'eroiis ; 
leaves opposite, spatulate or oblong-obovale, atteiniale l»elo\v, raflier ohtuse ; 
racemes apparently axillary, peduncled, simple, C.-u -llou ered ; petals ..iMivat.', 
entire, twice longer than the calyx.— Stems iiecoming 1" in h'nL^th; leaves 
1-2' long; flowers white, rather large. Cali(l)rnia to Alaska an<l eastward 
in the Rocky Mountains to Colorado. Trnekee Valley, llavnllah l{a»i-.'. and 
Battle Mountain, NevaJa, and in the Wahsatch and Cint;.^ 
altitude ; May-July. (184.) 
