504 SAXIFRAGACEAE 



above, more or less pubescent beneath, especially on the nerves : hypanthium campanulate, 

 nearly regular, strigose-villous: sepals ovate or oval-ovate, 1 mm. long, obtuse: petals 

 spatulate, pinkish, slightly longer than the sepals : stamens conspicuously exserted. 

 In rocky soil, Virginia to Illinois and Tennessee. Summer. 



5. Heuchera villosa Michx. Foliage quite glabrous or villous. Rootstocks rela- 

 tively slender : stems erect, usually tufted, 2-4 dm. tall, naked or bearing a few scales : 

 leaf-blades 5-10 cm. broad, suborbicular or orbicular-ovate in outline, slightly ciliate, 

 acutely 7-9-lobed, the surfaces sparingly pubescent, or bristly on the nerves beneath, the 

 lobes toothed ; petioles loosely villous or nearly glabrous : pedicels as long as the flower or 

 longer : hypanthium and calyx 3-4 mm. long at maturity, slightly hairy : sepals ovate : 

 petals linear-spatulate, 2-2.5 mm. long, about twice as long as the sepals, white or nearly 

 so : stamens much exserted : capsule much exceeding the calyx. 



On cliffs and rocks, in and near the mountains, Virginia and West Virginia to Georgia and Ten- 

 nessee. Summer and fall. 



6. Heuchera macrorhiza Small. Foliage often copiously villous. Rootstocks 

 stout, woody, 1-3 dm. long, scaly : stems erect or nearly so, 2-5 dm. tall, naked or with 

 several scales, surpassing the leaves : leaves basal ; petioles 1-3 dm. tall, densely villous ; 

 blades suborbicular in outline, 8-20 cm. in diameter, shallowly 5-9-lobed (lobes much 

 broader than' long), sharply, closely and irregularly dentate with apiculate teeth pubescent 

 on both sides, sparingly so above, densely ciliate, cordate: panicles 5-12 cm. long, nearly 

 cylindric : hypanthium and calyx densely pubescent, 2-2.5 mm. long at maturity: sepals 

 oblong or ovate-oblong : petals linear with a filiform base, fully twice as long as the sepals : 

 capsule about equalling the calyx at maturity. 



On river bluffs, Kentucky and Tennessee. Summer. 



7. Heuchera parviflora Bartl. Foliage rather bright green to hoary. Stems erect, 

 solitary or tufted, pubescent like the petioles, 1-6 dm. tall, sometimes bearing small scales: 

 leaf -blades orbicular- reniform or reniform, 5-14 cm. broad, shallowly 5-9-lobed, the lobes 

 crenate, the surfaces sparingly pubescent to densely hoary ; petioles slender, longer than 

 the blades, glandular-hirsute to villous-lanate : hypanthium campanulate, nearly 2 mm. 

 long, beset with scattered soft hairs : petals linear-spatulate, about 2.5 mm. long, thrice 

 longer than the ovate sepals : stamens conspicuously exserted. [H. Rugelii Shuttlw.] 



On cliffs or in rocky places, Kentucky to Missouri, North Carolina, middle Georgia and Alabama. 

 Summer and fall. 



8. Heuchera hirsuticaulis (Wheelock) Rydb. Foliage hirsute. Stems stout, 5-6 

 dm. tall, like the nerves of the leaf-blades thickly beset with spreading whitish or yellowish 

 hairs : leaves mainly basal ; blades suborbicular or reniform, 2.5-10 cm. broad, with 5-7 

 obtuse crenate-apiculate ciliate lobes, glaucous above, pale green beneath, the sinus broad 

 and deep ; petioles mostly longer than the blades, pubescent like the stems : panicle- 

 branches spreading : hypanthiura about 4 mm. long, campanulate, minutely glandular : 

 sepals somewhat unequal, obtuse, about as long as the hypanthium : petals spatulate, green- 

 ish or pinkish, not surpassing the sepals, minutely glandular : seeds about 0.5 mm. long. 



On shaded banks, Indiana and Missouri to Louisiana. Spring. 



9. Heuchera Americana L. Foliage sparingly glandular-pubescent or nearly gla- 

 brous. Stems erect, 3-8 dm. tall, naked or with a few small scales, glandular-pubescent : 

 leaves basal ; blades ovate to suborbicular, 5-10 cm. broad, cordate, 7-9-lobed, glabrous or 

 with a few scattered hairs on both surfaces, the lobes rounded, crenate ; petioles pubescent 

 like the stem : panicles 1-3 dm. long : hypanthium broadly campanulate, fully 1 mm. long 

 during anthesis : sepals ovate, obtuse : petals spatulate, clawed, about 2 mm. long, about 

 equalling the sepals, entire : stamens much exserted. 



In woods or rocky soil, Ontario to Minnesota, Georgia and Louisiana. Spring and summer. 



10. Heuchera calycosa Small. Resembling H. Amemana, but more slender. Stems 

 and petioles more or less puberulent : leaf-blades ovate or orbicular-ovate, 5-10 cm. long, 

 shallowly lobed, ciliate and pubescent near the margins : pedicels very slender : hypan- 

 thium turbinate, barely 1 mm. long during anthesis : sepals broadly ovate, about 2 mm. 

 long, rounded at the apex : petals oblong or spatulate-oblong, much surpassed by the 

 sepals, acute or apiculate, entire. 



In mountain woods, Georgia and Alabama. Spring. 



11. Heuchera Iancip6tala Rydb. Foliage sparingly glandular-hirsute. Stems stout, 

 5-7 dm. high, naked or nearly so : leaf-blades orbicular-reniform, 4-8 cm. broad, glabrous 

 except the ciliate margins and the nerves beneath : panicle narrower and more simple 

 than that of H. Americana: hypanthium open-campanulate beyond the turbinate base, 

 nearly equilateral : sepals ovate to oblong-ovate, 1.5-2 mm. long, obtuse, ciliolate : petals 

 oblanceolate, whitish or pinkish : stamens about twice as long as the petals. 



In woods, Kentucky and Tennessee. Spring and summer. 



