178 ROSACEAE 



Meadows or rotUy places near timberline, 7000 to 12,000 feet: White Mts.; 

 Sierra Nevada from Fresno Co. to IModoc Co., tlienee west to Siskiyou Co. East to 

 the Roi'ky ^Its. and New Jersey, north to British America; Europe, Asia. July- 

 Augr. 



Lois. — White Mts.: McAfee Mdws., Diiran 2S12. Sierra Nevada: Fresno Co., E. Ferguson 

 527; Parker Pass, Madera Co., A. L. Grant 1606; Mono Pass, Jepson 4430; Mt. Dana, Jepson 

 3322; Soda Springs Canon above Kennedy Lake, Tuolumne Co., A. L. Grant 486; Lily Lake, 

 Eldorado Co., Ottlcy 1166 (with large flowers and plane leaves similar to plants of the n. Rocky 

 Mts. and Alaska) ; Martin Sprs., Eagle Lake, Brown ^- Wieslander 4; Benton Mdws., Warner 

 Mts., L. S. Smith 890 ; Mt. Eddy, Siskiyou Co., Alexander 4- Kellogg 330. 



Eefs. — PoTENTiLixA TRUTicosA L. Sp. PI. 495 (1753), tj-pe from Europe; Jepson, Man. 486, 

 fig. 480 (1925). Dasiphora fruiicosa Rydb. Mem. Dept. Bot. Columbia Univ. 2:188, pi. 101, figs. 

 1-6 (1898). P. tenuifolia Willd. ; Schlecht. Ges. Nat. Freunde Berlin Mag. 7:284 (1815). P. 

 fruiicosa var. tenuifolia Lehm. Monog. Pot. 31 (1820). Dasiphora fruiicosa tenuifolia Rydb. 

 I.e. 190. P. fruticosa var. parvi folia Wats. Proc, Am. Acad. 8:561 (1873), type loc. East Hum- 

 boldt Mts., Nev. ; not P. parvifolia Fisch. (1831). P. fruticosa var. alpina Wats. ; Wats. & Rothr, 

 Cat. PI. Wheeler Surv. 8 (1874), type from Utah, Bothrock. Dasiphora fruticosa monticola 

 Rydb. I.e. 190, pi. 101, fig. 7 (1898). 



II. Subgenus Comarum. Leaves pinnate ; petals purple ; styles lateral ; achenes 



numerous, hairy. 



2. P. palustris Scop. Marsh Cowberry. Stems stout, ascending from long 

 creeping rootstocks, 2 to 3 feet high, often rooting at the decumbent base, glabrous 

 below, puberulent above; leaves pinnate; leaflets 5 to 7, oblong, 1 to 1% inches long, 

 mostly glabrous except along the veins and margins; petioles 1 to 3 inches long; 

 lower stipules adnate, 1 to 1^2 inches long; flowers 1 to 2 inches wide, few to several 

 in an open cyme ; calyx spreading, pubescent, purplish-green below, dark reddish- 

 purple above; sepals l^ to ^/^ inch long, or becoming 1 inch long; petals very dark 

 purple, ovate-lanceolate, 2 lines long; stamens 20 to 23, on a glandular ring; fila- 

 ments rather stout, broader at base, dark purple; receptacle becoming enlarged and 

 spongy in fruit; achenes numerous. 



Cold bogs, often aquatic, 2000 to 6000 feet : Placer Co. to Shasta and Modoc 

 Cos. North to Alaska, east to Labrador; Europe, Asia. June- Aug. 



Locs. — Lake Tahoe (Univ. Cal. Publ. Bot. 9:239) ; Goose Valley, Shasta Co., M. S. BaTcer; 

 Willow Lake, Modoc Co., R. M. Austin 544. 



Yar. villosa Lehm. Stems often glandular on upper portion ; leaves densely appressed with 

 short sUky hairs beneath. — Mendocino Co. (Garcia Creek, ace. J. T. Howell) to Del Norte Co. 

 (Crescent City, Davy 5933). North to Canada, east to the Atlantic. Europe, Asia. 



Refs. — PoTENTlLLA PALUSTRIS Scop. Fl. Cam. ed. 2, 1 :359 (1772) ; Jepson, Man. 485 (1925)v 

 Comarum palustre L. Sp. PL 502 (1753), type from Europe; Rydb. Mem. Dept. Bot. Columbia 

 Univ. 2:162, pi. 99 (1898). Argentina rubra Lam. Fl. Fr. 3:120 (1778). Var. villosa Lehm. 

 Monog. Pot. 53 (1820), type loc. (ace. Rev. Pot. 74,-1856), "Groenlandia et Hibernia"; Jepson, 

 Man. 486 (1925). 



III. Subgenus Argentina. Leaves interruptedly pinnate; petals yellow; styles 

 lateral; achenes numerous, glabrous. 



3. P. anserina L. Silver-weed. Leaves and peduncles in a basal tuft on a 

 fascicle of roots, producing slender runners, these rooting at each joint; leaves 

 pinnate, white-silky beneath, dark gTeen and usually pubescent above, the blades 

 31/2 to 12 (or 24) inches long; petioles % to 6 (or 12) inches long; leaflets 13 to 21, 

 with smaller ones interposed, oblong, sharply serrate, V2 to 1^4 inches long; flowers 

 solitary on long peduncles, % to I14 inches wide; calyx-tube turbinate, 2 to 2^/2 

 lines wide; petals elliptic to orbicular, much exceeding the sepals; stamens 20 to 25; 

 receptacle hairy; achenes corky, with a deep dorsal groove. 



Marshy or springy places, 5 to 6000 feet : cismontane Southern California. East 

 to the Atlantic. Europe, Asia. Apr.-July. It has been called Goose-grass im- 

 memorially by the folk. 



Loes. — Ballona, Braunton 455; Santa Monica, Barber 131; Mt. San Bernardino, Hall 1034. 



