SAXIFRAGE FAMILY 383 



9. Heuchera ovalifolia Nutt. Oval-leaved Heuchera. Fig. 2298. 



Heuchera ovalifolia Nutt. ex Torr. & Gray, Fl. N. Amer. 1: 581. 1840. 

 Heuchera cylindrica var. alpina S. Wats. Bot. King Expl. 94. 1871. 

 Heuchera cylindrica var. ovalifolia Wheelock, Bull. Torrey Club 17: 203. 1890. 

 Heuchera alpina Blankinship, Mont. Agr. Coll. Sci. Stud. 1 : 62. 1905. 

 Heuchera Suksdorfii Rydb. N. Amer. Fl. 22: 116. 1905. 



Densely cespitose from a stout creeping rhizome ; flowering branches leafless, densely glandu- 

 lar-pubescent with short hairs, bearing one to several triangular-subulate, glandular-ciliate, 

 scarious bracts, 8-30 cm. high. Leaves all basal, rounded-oval, 1-4 cm. broad, about as long as or 

 slightly longer than broad, truncate or rounded, or rarely very slightly cordate at the base, 

 crenately to more deeply lobed, with rounded or slightly acuminate and mucronate teeth, or 

 merely deeply and doubly crenate-serrate, thickish, at least the youngest more or less glandular- 

 puberulent ; petioles 3-10 cm. long, densely glandular-puberulent ; inflorescence dense, often sub- 

 capitate, 1-6 cm. long; hypanthium deeply campanulate, yellowish, densely short-hirsute and 

 glandular, with the broadly oblong, acute or obtuse sepals 5-7 mm. long; petals usually absent. 



Rocky banks and hillsides, Arid Transition to Hudsonian Zones; Alberta and British Columbia to Wyoming 

 and south through Washington and eastern Oregon to northern Nevada and northeastern California. Type 

 locality: Blue Mountains, Oregon. May-July. 



10. Heuchera chlorantha Piper. Green-flowered Heuchera. Fig. 2299. 



Heuchera chlorantha Piper, Contr. U.S. Nat. Herb. 16: 206. 1913. 



Cespitose from a stout rhizome ; flowering stems leafless, naked or with one or two minute 

 fimbriate bracts, villous, 5-8 dm. high. Leaves all basal, orbicular to slightly reniform, rather 

 deeply cordate at base, 4-8 cm. broad, crenately 7-9-lobed, the lobes with broad cuspidate teeth, 

 glabrous except on the veins beneath ; petioles 5-20 cm. long, conspicuously villous with irregu- 

 larly spreading or somewhat retrorse, usually brownish hairs ; inflorescence a dense narrow 

 panicle, 5-10 cm. long, glandular-pubescent ; flowers subtended by relatively large ovate to lan- 

 ceolate f oliaceous fimbriate bracts ; hypanthium greenish, deeply urceolate-campanulate, pruinose- 

 puberulent, with the oblong sepals 6-8 mm. long, lengthening in fruit ; petals minute or lacking. 



In damp meadows, Humid Transition Zone; British Columbia east to Idaho and southward through western 

 Washington to southern Oregon. Type locality: Falcon Valley, Klickitat County, Washington. June-July. 



11. Heuchera glabella Torr. & Gray. Smooth Heuchera. Fig. 2300. 



Heuchera glabella Torr. & Gray, Fl. N. Amer. 1 : 581. 1840. 



Holochloa glabella Nutt. ex Torr. & Gray, Fl. N. Amer. loc. cit., as a synonym. 



Heuchera cylindrica var. glabella Wheelock, Bull. Torrey Club 17: 203. 1890. 



Usually densely cespitose from a thick woody rhizome; flowering branches leafless, 2.5-6 dm. 

 high, finely puberulent or glabrous, usually with several minute scarious bracts. Leaves all 

 basal, shining, firm and somewhat coriaceous in texture, rounded-oval or orbicular, slightly cor- 

 date or truncate at the base, 2-5 cm. wide and as long or slightly longer, glabrous or minutely 

 glandular-puberulent, short-ciliate, round-lobed and with crenate mucronate teeth ; petioles 3-10 

 cm. long, finely puberulent or glabrous; inflorescence narrow, sometimes almost subcapitate, 

 3-25 cm. long ; hypanthium deeply campanulate, including the broadly oblong sepals 5-8 mm. 

 long ; petals usually none. 



Rocky hills, Arid Transition Zone; Alberta to Montana and British Columbia south through Idaho, eastern 

 Washington to northeastern Oregon. Type locality: "Rocky Mountains towards the Oregon." June-Aug. 



12. Heuchera tenuifolia (Wheelock) Rydb. Thin-leaved Heuchera. Fig. 2301. 



Heuchera cylindrica var. tenuifolia Wheelock, Bull. Torrey Club 17: 204. 1890. 

 Heuchera tenuifolia Rydb. N. Amer. Fl. 22: 116. 1905. 



Acaulescent ; flowering branches glabrous or minutely glandular-puberulent, 4-6 dm. high, 

 naked or bearing one or two small scarious bracts. Leaves reniform or rounded-oval, distinctly 

 cordate at the base, thin, mostly entirely glabrous, shallowly round-lobed and crenate, with 

 broad, rounded, ciliate and bristle-tipped teeth; petioles slender, 5-15 cm. long, glabrous or 

 minutely glandular-puberulent ; inflorescence spiciform ; hypanthium deeply campanulate, mi- 

 nutely glandular-puberulent, greenish, yellowish toward the sepals, including these about 6 mm. 

 long; petals oblanceolate, one-half to two-thirds as long as the sepals, or none. 



Hillsides, mostly Arid Transition Zone; British Columbia south to northern Oregon and east to Idaho. Type 

 locality: near The Dalles, Oregon. May-July. 



Heuchera Cusickii Rosend. Butt. & Lak. Minn. Stud. PI. Sci. 2: 157. 1936. Flowering stems from a 

 subrhizomatous caudex, 15-30 cm. high, scapiform. Leaves all basal, cordate-orbicular or broadly ovate, 10— 

 25 mm. broad, 5-7-lobed, the lobes broadly ovate or obovate, dentate, the teeth aristate, glabrous; petioles slender, 

 1—5 cm. long, glabrous or glandular-puberulent; inflorescence a short dense spike-like or subcapitate panicle; 

 hypanthium short-campanulate, 3.5-4 mm. long, glandular-puberulent; sepals unequal, about 1.5 mm. long; 

 petals about equaling the sepals, oblanceolate to spatulate; stamens short. Known only from the type collection, 

 made "5 miles west of Imnaha, Wallowa County, Oregon." 



13. Heuchera Duranii Bacigalupi. Duran's Heuchera. Fig. 2302. 



Heuchera Duranii Bacigalupi, Contr. Dudley Herb. 1: 191. 1933. 



Acaulescent and cespitose from a relatively stout ascendingly branched perennial caudex ; 

 flowering stems one or two from a caudex-branch, slender, glandular-puberulent, 1 . 5-3 dm. tall, 

 bearing a pinkish hyaline linear-spatulate fimbriolate-ciliolate bractlet. Leaves reniform, the 

 smaller suborbicular, dull gray-green, crenately lobed and toothed, ciliolate, densely glandular- 

 puberulent, 8-18 mm. broad; petioles slender, glandular-puberulent, 1.5-2.5 cm. long; panicle 

 very narrow, glandular-puberulent, 4-8 cm. long ; bractlets subtending the hypanthium similar to 



