4^2 FLORA. 



cm. broad, rounded-lobed and crenate, glabrous <>r slightly hispidulous above, cili- 

 ate on the margins : stem leaves orbicular or broadly ovate, sharply toothed with 

 acuminate teeth; panicle lax. open, with divergent branches; calyx puberulent, its 

 lobes oblong, obtuse ; petals purple, puberulent, spatulate, scarcely exceeding the 

 calyx-lobes. Rich woods of Va. and N. Car. June. 



Heuchera Curtisii crenita Rydb. Stem more leafy, with 3-5 rounded cordate or 

 orbicular, crenate leaves ; panicle narrower and petals minute. Va. to N. Car. Type 

 from Peaks of Otter, Va. 



4. Heuchera villosa Michx. Hairy Heuchera. (I. F. f. 1844.) Stem erect, 

 2-6 dm. high, Leafless, or bearing a few small bracts, generally villous-pubesccnt with 

 brownish hairs, as are also the long petioles and the veins on the lower surfaces oi 

 the haves. Basal leaves 7-12 cm. wide, orbicular or sometimes longer than broad; 

 flowering calyx campanulate, regular; petals linear- spatulate, white or nearly so. 

 about twice as long as the calyx-lobes; stamens much exserted. In rocky places, 

 Va. and W. Va. to Ga. and Tenn. June-Sept. Called also American Sanicle. 



5. Heuchera crinita Rydb. Large Hairy Heuchera. Stem 5-7 dm. 

 high, stout, bearing some bracts or often 1-3 leaves, villous, as well as the petioles, 

 with brownish hairs. Basal leaves rounded, reniform, 10-22 cm. in diameter, 

 glabrous or slightly hispidulous above, more or less hairy beneath, especially on 

 the veins; flowering calyx campanulate, almost regular, strigose-villous; petals 

 spatulate, pinkish, slightly longer than the calyx-lobes; stamens about twice as 

 long. In the form of the leaves it is intermediate between the preceding and the 

 next, but it is much larger than either. In rocky places, from Ky. and 111. to Va. 

 Type from Ky. 



6. Heuchera parvifldra Bartl. Rugel's Heuchera. (I. F. f. 1843.) Stems 

 slender, 1. 5-6 dm. long, weak, glandular-hirsute or villous, leafless, often bearing 

 a few bracts. Basal leaves with long slender glandular-villous petioles, broadly 

 reniform, 5-13 cm. wide, with 7-9 broad lobes; inflorescence very loosely paniculate; 

 flowering calyx regular, campanulate; petals linear- spatulate, 2-3 times as long as 

 the calyx-lobes; stamens somewhat exserted. Shaded cliffs, Mo. and 111. to western 

 N. Car. July-Sept. The name H. Rugelii Shuttlw., of 1847, must give place to 

 the older //. parvi flora Bartl.. of 1839. 



7. Heuchera hirsuticaulis (Wheelock) Rydb. Hirsute Heuchera. Stem 

 stout, 5-6 dm. high, leaflets long-hirsute. Leaves reniform, 5-10 cm. broad, 

 glabrate or sometimes hirsute above, hirsute on the veins beneath; flowering 

 calyx campanulate, glandular-puberulent, somewhat oblique ; petals spatulate. 

 greenish or purplish, generally shorter than the oblong obtuse calyx segments; 

 stamens fully twice as long. Rocky banks, Mo., 111. and Ind. May-June. [//. 

 hispida hirsuticaulis Wheelock.] 



8. Heuchera Americana "L. Alum-root. (I. F. f. 1845.) Stem 6-9 dm. 

 high, leafless, more or less glandular-hirsute. Basal leaves long-petioled, 7-10 

 cm. wide, with 7-9 rounded crenate-dentate lobes, the older ones glabrous, or 

 with scattered hairs on the upper surface; flowering calyx broadly campanulate, 

 nearly regular, 3-5 mm. long ; petals small, greenish ; stamens much exserted ; 

 anthers orange. In dry or rocky woods, Ont. to Conn., Minn., Ala. and La. 

 May-Aug. 



9. Heuchera lancipetala Rydb. Long-petaled Alum-root. Stem stout, 

 about 6 dm. high, naked, sparingly glandular-hirsute. Leaves round-reniform, 

 resembling those of the preceding, rather firm, glabrous except the ciliate margins 

 and the vein- beneath; panicle narrower and more simple than in the preceding; 

 flowering calyx open campanulate, but decidedly turbinate at the base, nearly 

 regular; petals whitish or pinkish; stamens about twice as long. Type from Ky. 



10. Heuchera longiflora Rydb. LoNG-FLOWBRED Heuchera. Stem about 

 5 dm. high, glandular-puberulenl above, naked or with a few small bracts. 

 Leaves firm, glabrous, except the ciliate margins, reniform. 5-8 cm. 'in diameter; 

 (lowering calyx deeply campanulate, oblique, gibbous at the base on the shorter 

 side, glandular-puberulent, iis lobes oblong, very obtuse; petals spatulate with a 



slender claw, yellow at the base, purple tipped, about equalling the calyx -segments; 



stamens and Style include, 1. Hills bordering Mudlick bath, Ky. May. 



