228 



SAXIFRAGACEAE. 



VOL. II. 



9. Heuchera longiflora Rydb. Long- 

 flowered Heuchera. Fig. 2181. 



Heuchera longiflora Rydb.; Britton, Man. 482. 

 1901. 



Stems ii-3 high, glabrous or hirsutulous 

 above, leafless. Leaves long-petioled, orbicular- 

 reniform to orbicular-ovate, 2 f ~4' wide, shal- 

 lowly lobed and with very broad teeth; panicle 

 lax, wide, with slender branches ; flowering 

 calyx 4"-s" long, oblique, the lobes unequal; 

 petals rhombic-spatulate, equalling the calyx- 

 lobes; stamens included. 



On hillsides, Kentucky to Alabama. May-June. 



10. Heuchera pubescens Pursh. Downy Heuchera. Fig. 2182. 



H. pubescens Pursh, Fl". Am. Sept. 187. 1814. 



Stems rather stout, l-3 high, densely 

 glandular-pubescent, at least above, usually 

 bearing I or 2 small leaves. Basal leaves 

 slender-petioled, broadly ovate or orbicular, 

 cordate, 2'-^' wide, S-7-lobed, the lobes 

 rounded or acute, crenate or dentate; panicle 

 loose; flowering calyx oblong-campanulate, 

 somewhat oblique, 3"-4" long, minutely glan- 

 dular, its lobes usually unequal ; petals broadly 

 spatulate, purplish, slightly exceeding the 

 calyx-lobes ; stamens scarcely or slightly ex- 

 serted. 



In rich woods, mountains of Pennsylvania to 

 Kentucky, Missouri and North Carolina. As- 

 cends to 4000 ft. in North Carolina. May-June. 



13. MITELLA [Tourn.] L. Sp. PI. 406. 1753. 



Erect perennial herbs, with long-petioled ovate or orbicular basal leaves, naked or 

 2-leaved scapes, and small white or greenish flowers in elongated spiciform racemes. Calyx- 

 tube campanulate or hemispheric, adnate to the base of the ovary, its limb S-lobed. Petals 5, 

 3-cleft or pinnatifid. Stamens 10 (sometimes 5); filaments short. Ovary globose, l-celled; 

 styles 2, short; ovules o. Capsule i-celled, 2-valved at the apex, many-seeded. Seeds 

 smooth, shining. [Diminutive of mitra, a cap, from the form of the young pod.] 



About 4 species, natives of North America and eastern Asia. Type species : Mitella diphylla L. 



Basal leaves ovate ; scape with 2 opposite leaves. 



Basal leaves reniform ; scape naked or i -leaved near the base. 



1. M. diphylla. 



2. M. nuda. 



