136 SAXIFRAGACEAE 



inches wide, the margjin minutely bristly-ciliate; panicle rather narrow (6 to 9 

 inches lonp;, 1 to 21/2 inches wide), cylindric or subcylindric in outline, not so open 

 as compared with II. micrantha; calyx hirsute, bowl-shaped or hemispheric, li/^ 

 lines k)iij::. 



Rocky banks or cliffs, along the coast line, 20 to 800 feet: Monterey Co. to the 

 Santa Barbara Islands. May-June. 



Locs. — Lucia, Santa Lucia Mts., Jepson 1668; Gorda, Monterey coast, E. Brandegee ; Santa 

 Hosa Isl., T. Brandegee ; Pelican Bay, Santa Cruz Isl., Jepson 12,124. 



Refs. — Heuchera maxima Greene, Bull. Gal. Acad. 2:149 (1886), type loc. n. side of Santa 

 Cruz Isl., Greene. II. hcmisphaerica Rydb. N. Am. Fl. 22:112 (1905), type loc. Santa Lucia Mts., 

 T. brandegee. H. pilosissima var. hemisphacrica Ros. ; Engler, Bot. Jahrb. 37^: beibl. 78 (1905). 

 H. piloscUa Rydb. I.e., type loc. near San Luis Obispo, Palmer 124. 



5. H. pilosissima F. & M. Coast Alum-root. Plants 1 to 2 feet high; petioles 

 and scapes glandular-pilose; leaf -blades roundish-cordate, or cordate-ovate, 1 to 3 

 inches wide, hirsutulose, shallowly lobed, the lobes with rounded bristle-tipped 

 crenations; floAvers in close clusters, the panicle narrow or contracted, much less 

 ample than in H. micrantha; calyx globular, densely hispid with white hairs, ex- 

 ceeding or almost equaling the pedicel; petals narrowly linear. 



Rocky wooded slopes along the coast line, 50 to 1000 feet: Monterey Co. to 

 Mendocino Co. May-June. 



Xote on variation. — This species is perhaps even more variable than H. rubescens Torr. 

 No two plants studied by us are quite alike, but differ much in detail. The clusters of flowers or 

 the inflorescences as a whole are variously contracted ; the basal leaf-sinus is open or conspicu- 

 ously closed ; the habit is inconstant. In typical state Heuchera pilosissima is rare and we have 

 only the following; collections: Pt. Lobos, Monterey Co., Heller 6803; Big River, Mendocino Co., 

 Bolander 4830; Noyo River, T. Brandegee. 



Refs. — Heuchera pilosissima F. & M. Ind. Sem. Hort. Petrop. 5:36 (1838), type loc. 

 Ross, Sonoma Co.; Linnaea, 13, litt.-bericht. 110 (1839) ; Erythea 2:165 (1894) ; Jepson, Fl. W. 

 Mid. Cal. 271 (1901), ed. 2, 200 (1911), Man. 463 (1925). H. hispida H. & A. Bot. Beech. 347 

 (1840), type from Cal., Douglas. H. hirtiflara T. & G. Fl. 1:582 (1840). 



6. H. rubescens Torr. Jack-o'-the-rocks. Plants 5 to 12 inches high, the 

 scapes sparingly hirsutulose or nearly glabrous; leaf -blades % to 1^/2 inches broad, 

 round-cordate, shallowly lobed, the lobes crenate with subacute teeth, the teeth 

 ciliate, bristle-tipped; petioles pilose; panicle open or narrow, the branches spread- 

 ing from the main axis, sometimes horizontal; calyx 2 to 3 lines long, its tube tur- 

 binate-cylindric, becoming umshaped in age; petals linear to narrow-oblanceolate; 

 stamens as long as or longer than the petals. 



Rocky slopes, 6000 to 10,500 feet : higher Sierra Nevada and especially its east 

 slope. East to Utah, south to Arizona and north to Oregon. July. 



Locs. — Above Donner Lake, Sonne 474; Castle Peak (Mt. Stanford), Sonne (petioles gla- 

 brous or sparsely puberulent) ; Bloody Canon, Mono Co., Jepson 4454. The following varieties 

 are of slight importance and all show intergradations, especially the first two. 



Var. nevadensis Jepson nom. n. Leaf -blades mostly 4 to 9 lines broad, truncatish or sub- 

 cordate at base; petioles short (% to % or rarely to 2 inches long) ; calyx turbinate-campanu- 

 late. — Montane, clefts of granite or rocky slopes, mostly 6000 to 10,500 feet: west slope of the 

 Sierra Nevada from Tulare Co. to Siskiyou Co. ; White Mts. June. 



Locs. — Mt. Whitney, Jepson 1094 ; Kcrn-Kaweah River, Jepson 5023 ; Farewell Gap, Jepson 

 1037; Mt. Silliman, Hopping 329; Roaring River, Kings Caiion, Newlon 234; Heart Lake, nw. 

 Inyo Co., ace. Peirson; Home-camp Creek, Huntington Lake, A. L. Grant 1419; Lake Merced, 

 Yosemite Park, Jepson 3202; Shasta River, Butler 216. Wliite Mts.; Cottonwood Creek, Jep- 

 son 7378. 



Var. parisMi Jepson. Leaf -lobes of the older leaves mostly very short and rounded, entire 

 or sparingly toothed; calyx-tube cylindric-turbinate, 2^/^ to 3 lines long; stamens exserted. — 

 San Bernardino Mts.; San Jacinto Mts. In our specimen of Parish 2512 (isotype of H. parishii 

 Rydb.), truncatish or rounded leaf -lobes characterize one individual, obscurely acutish lobes the 

 other individual. 



Var. elegans Jepson. (Fig. 153.) Plants 6 to 14 inches high ; scapes pilose ; leaves % to 1% 

 inches wide; panicle narrow or virgate, its branches erect or ascending; flowers 3 to 4 lines long; 



