SAXIFRAGE FAMILY 



381 



branches of the panicle. Basal leaves with a cordate base, ovate to rounded in outline, deeply 

 and acutely S-7-lobed, sparingly hirsutulous and hispid-ciliate when young, soon entirely 

 glabrous, very thin, shining above, 3-10 cm. wide and as long or slightly longer ; lobes tri- 

 angular-ovate, the terminal one sometimes narrower, acute, doubly and sharply serrate, the 

 serrations often apiculate; petioles 6-20 cm. long, slender, glabrous; cauline leaves similar, 

 the upper smaller and shorter-petioled ; panicle lax, 5-20 cm. long, ovate-oblong in outline, 

 moderately glandular-puberulent ; hypanthium turbinate-campanulate, puberulent, with the sepals 

 2.5-3 mm. long; petals white, broadly spatulate or oval with very slender claws, acute or 

 obtusish, about twice the length of the sepals; capsule and beaks at length much exserted, 

 6-8 mm. long. 



Damp shady rocks and cliffs, Canadian and Hudsonian Zones; subarctic British America and Alaska south- 

 ward in the Cascade Mountains to central Oregon; also in the Olympic Mountains of Washington. Type locality: 

 "West Coast of North America." July-Sept. 



3. Heuchera micrantha Dougl. Small-flowered Heuchera or Alum Root. 



Fig. 2292. 



Heuchera micrantha Dougl. Bot. Reg. pi. 1302. 1830. 



Heuchera barbarossa Presl, Rel. Haenk. 2: 56. 1831. 



Heuchera Hartwegii (S. Wats.) Rydb. N. Amer. Fl. 22: 102. 1905. 



Heuchera diversifolia Rydb. loc. cit. 



Heuchera glaberrima Rydb. op. cit. 22 : 103. 



Heuchera Nuttallii Rydb. loc. cit. 



Heuchera Lloydii Rydb. op. cit. 22: 113. 



Flowering branches 1-4-leaved or scapiform, usually stoutish, 3-7 dm. high, more or less 

 hirsute with whitish or brownish hairs, at least below. Basal leaves round- to ovate-cordate, 

 acute or obtuse at apex, 4-10 cm. long, mostly incised, the lobes rounded and dentate with 

 broadly ovate, cuspidate teeth, sparingly short-hirsute on both sides to glabrate above, conspicu- 

 ously long-hairy on the veins beneath, especially toward the base; petioles 8-15 cm. long, usually 

 densely villous-hirsute ; cauline leaves smaller, usually more acutely lobed and with more evi- 

 dent stipules; inflorescence usually an ample and diffuse panicle; pedicels and rachis usually 

 finely glandular-puberulent ; bracts linear, or the lower with linear-lanceolate attenuate teeth ; 

 hypanthium short-campanulate, turbinate at the base, appressed-pilose, including the ovate, 

 obtuse sepals 1.5-2.5 mm. long, much shorter than the filiform pedicels; petals oblanceolate or 

 narrower, whitish, two to two and one-half times as long as the sepals. 



Woods and ravines, Humid and Arid Transition Zones; Vancouver Island, southern British Columbia, and 

 northern Idaho, southward west of the Cascade Mountains to Tulare County in the Sierra Nevada and San Luis 

 Obispo County in the Coast Ranges, California. Type locality: near the Grand Rapids of the Columbia River. 

 May-July. Variable as to pubescence and leaf-margins and several varieties have been proposed. 



4. Heuchera maxima Greene. Island Heuchera. Fig. 2293. 



Heuchera maxima Greene, Bull. Calif. Acad. 2: 149. 1886. 



Caulescent perennial, the stout fleshy often decumbent stem sometimes branched and 2-6 dm. 

 long, or ascending and 0.5-1.5 dm. high, densely clothed with the stipular-expanded fimbriate- 

 ciliate petiole-bases. Flowering branches often very stout, 3-6 dm. tall, often bearing 3 or 4 

 ample leaves, densely hirsute, glandular above; petioles 8-18 cm. long, densely hirsute; leaf- 

 blades orbicular- to ovate-cordate, the basal sinus usually very deep, 4-15 cm. in diameter or 

 7-9 cm. wide and 9-12 cm. long, the lobes narrowly to broadly ovate, rounded, crenate-dentate to 

 serrate, bristle-tipped and ciliolate, glabrous above, hirsute on the veins beneath; inflorescence 

 relatively dense, elongated and narrowly thyrsoid, 6-30 cm. long ; hypanthium densely glandular- 



2294 ' S/ 

 2294. Heuchera rubescens 



2295 

 2295. Heuchera elegans 



2296 

 2296. Heuchera brevistaminea 



