190 ROSACEAE 



Rofs. — PoTKNTiM.A KLABELMFOKMis Lclini. Stirp. I'lij;. 12:12 (1830), tvpp loc. Saskatchewan; 

 Monog. Pot. suppl. 1, pi. «5 (1835) ; Rydb. Mem. Dept. Bot. Coluinbia Univ. 2:74, pi. 28, fiRs. 1-5 

 (1898) ; .Tepson, Man. 489 (1925). P'. gracilis var. flabclliformis Nutt.; T. & G. Fl. 1 :440 (1840). 

 P. flabrUiformix var. typica Wolf, Biblio. Bot. 1()'':214 (1908). /'. fldlxlliformis var. icnuior 

 Lelim. Kev. Pot. 108 (1856), "asservatur in herb. Colnianniano." 7'. flnhrUiformis var. ti/pica f. 

 Unuiin- Wolf, I.e. P. fiahiUiformis var. ctenophora Rydb. Bull. Torr. Club 24:7 (1897), "Wyom- 

 ing to British Columl)ia and Saskatchewan". P. ctenophora Rydb. Mom. Dept. Bot. Columbia Univ. 

 2:75, pi. 28, fig. t) (1898). Var. inyoensis .Tepson. P. flabelliforinis var. ctenophora Jepson, 

 Man.' 489 (1925) ; not P. flabclliformis var. ctenophora Rydb. (1897), or P. ctenophora Rydb. 

 (1898). 



VI. Subgenus Ivesia. Leaflets many to numercnis, small, usually crowded or 

 imbrieated, commonly palmately cleft or divided, 1 to 4 lines long ; calyx-tube 

 mostly campanulate or bowl-shaped; petals white or yellow; stamens 5 to 20; 

 filaments filifonn (except 2 species) ; style terminal or nearly so; pistils 1 to 15, 

 rarely 20 to 2.'). 



23. P. purpurascens Greene. Summit Ivesia. Stems erect, 6 to 15 inches high, 

 with mostly basal leaves; herbage pubescent and somewhat villous or slightly gray- 

 ish; leaves pinnate, the blades 2 to 8 inches long, the petioles i/^ to 1^/4 inches long; 

 leaflets numerous, usually closely crowded, 2 to 4-parted into oblong-oblanceolate 

 divisions, 2 to 3 lines long ; cyme few-flowered, simple or dichotomously branched, 

 with the clusters open or somewhat congested; flowers 6 to 7 lines wide; calyx-tube 

 purplish, bowl-shaped, 2 to 2^2 lines wide; bractlets small and narrow; petals white 

 or purple-tinged, rotate, broadly cuneate-oblong, truncate or slightly refuse, 3 lines 

 long; stamens 20, those opposite the calyx-lobes longest; filaments subulate-dilated, 

 often scabrous or minutely pubescent; receptacle hairy, conical; achenes 20 to 25. 



Margins of summit valleys and meadows, 6600 to 9000 feet; eastern Tulare Co. 

 June-Aug. 



Locs. — Volcano Creek, Jepson 959 ; Trout Mdws., Hall cf- Bahcoclc 5408 (herbage densely 

 pubescent) ; Clicks Creek, Little Kern River, Kail 4' Bahcoclc 8373; Kern River flat, Culbertson 

 4309 (herbage nearly glabrous) ; Monache Mdws., Hall 4' Babcoch 5219. 



Var. congdonis Jepson. Stems more strictly erect, % to 2 feet high; herbage minutely 

 hirsutulous and glandular; leaves 2^4 to 9 inches long, sometimes with very densely crowded 

 leaflets, thus becoming terete in outline; cymes more congested, corymbose to subcapitate; calyx- 

 lobes less regularly reflexed. — East side or easterly summits of the southern Sierra Nevada in 

 Mono, Inyo and Tulare Cos. 



Locs. — Casa Diablo, Mono Co., Congdon; McGee Mdws., Inyo Co., K. Brandegee (leaflets 

 much reduced, densely imbricate) ; Long Valley, Inyo Co., K. Brandegee ; upper Bishop Creek, 

 Inyo Co., K. Brandegee ; Alta Mdws., Tulare Co., K. Brandegee. 



Refs. — PoTENTiLLA PURPURASCENS Greene, Pitt. 1:105 (1887); Jepson, Man. 491 (1925). 

 Eorkelia inirpurascens Wats. Proc. Am. Acad. 11:148 (1876), type loc. headwaters of Kern River, 

 EothrocTc; Rothrock, Bot. Wheeler 360, pi. 3a, figs. 1-3 (1878) ■ Rydb. Mem. Dept. Bot. Columbia 

 Univ. 2:143, pi. 82 (1898). Horlceliella purpurascens Rydb. N. Am. PL 22:282 (1908). P. pur- 

 purascens var. pinetorum Cov. Proc. Biol. Soc. Wash. 7:77 (1892), type loc. Trout Mdws., Kern 

 River, Coville 1579. BorTcelia pinetorum Rydb. Bull. Torr. Club 25:55 (1898) ; Mem, Dept. Bot. 

 Columbia Univ. 2:143, pi. 83 (1898). EorTceliella pinetorum Rydb. N. Am. Fl. 22:282 (1908). 

 Eorlcelia purpurascens var. pinetorum Smiley, Univ. Cal. Publ. Bot. 9:241 (1921). Var. cong- 

 donis Jepson, Man. 491 (1925). Eorlcelia congdonis Rydb. Bull. Torr. Club 26:543 (1899), type 

 loc. Casa Diablo, Mono. Co., Congdon. EorTceliella congdonis Rydb. N. Am. Fl. 22:283 (1908). 



24. p. kingii Greene. Alkali Ivesia. Stems several, erect or ascending, 8 to 

 15 inches high; herbage glabrous, somewhat glaucous; leaves pinnate, the basal 

 many, 2 to 5 inches long, their petioles 3 to 10 lines long; leaflets numerous, crowded, 

 divided to the base into 2 to 4 segments, or those of cauline leaves often simple; seg- 

 ments oblong to orbicular, 1 to 3 lines long; cyme dichotomously branched; pedicels 

 slender, 3 to 5 lines long, these and the calyx somewhat pubescent; calyx-tube shal- 

 low, 11/4 to 2 lines wide ; petals white, broadly spatulate with a short claw, 2^4 to 

 Sy2 lines long ; stamens 15 to 20 ; filaments filiform ; pistils 2 to 5 (or 8) . 



Alkaline soil in valleys, 1000 to 6500 feet : Mono Co. East to Nevada and west- 

 ern Utah. June-Aug. 



