i8o 



SAXIFRAGACEAE. 



[VOL. II. 



5. Heuchera hispida Pursh. 



Rough Heuchera. 



(Fig. 1847.) 



Heuchera hispida Pursh, Fl. Am. Sept. 

 188. 1814. 



Heuchera Richardsonii R. Br. Frankl. 

 Journ. 766. pi. 29. 1823. 



Stem 2-4 tall, hirsutely-pubescent 

 or rarely nearly glabrous, usually leaf- 

 less. Leaves 2 / ~3 / wide, on long and 

 slender petioles, broadly ovate-orbicu- 

 lar, with 5-9 shallow rounded dentate 

 lobes; panicle strict, narrow; flowering 

 calyx campanulate, very oblique, $"-" 

 long, its lobes unequal; petals spatulate, 

 slightly exceeding the calyx-lobes; 

 stamens exserted. 



In woods, Virginia to western Ontario, 

 west to Kansas, Manitoba and the North 

 \vt-st Territory, south in the Rocky Moun- 

 tains to Montana and Idaho. May-June. 



Heuchera hispida hirsuticaiilis Wheelock, Bull. Torr. Club, 17: 199. 1890. 



Very hirsute with white spreading hairs; flowering calyx slightly oblique, about 2" long; 

 stamens much exserted. Probably a distinct species. On rocks, Missouri and Indiana. 



7. MITELLA L. Sp. PI. 406. 1753. 



Erect perennial herbs, with long-petioled ovate or orbicular basal leaves, naked or 2- 

 leavcd scapes, and small white or greenish flowers in elongated spiciform racemes. Caly x-tul >i- 

 campanulate or hemispheric, adnatc to the base of the ovary, its limb 5-lobed. Petals 5, 3- 

 clefl or pinnatifid. Stamens 10 (sometimes 5); filaments short. Ovary globose, i-cellcd; 

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

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



About 7 species, natives of North America and eastern Asia. Besides the following, about 4 

 cithers occur on the Pacific Coast. 



Basal leaves ovate ; scape with 2 opposite leaves. 



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



1. M. diphylla. 



2. M. HH tiii. 



i. Mitella diphylla L. Two- 

 leaved Bishop's Cap, or Mitre- 

 wort. (Fig. 1848.) 



Mitella diphylla L. Sp. PI. 406. 1753. 



Scape io'-i8' high, pubescent, bear- 

 ing a pair of opposite nearly or quite 

 sessile leaves near its middle. Basal 

 leaves broadly ovate, cordate at the 

 base, acute or acuminate at the apex, 

 3~5-lobed, dentate, scabrous and with 

 scattered hairs on both sides, i / -2 / 

 long; leaves of the scape similar, usu- 

 ally smaller; spiciform raceme erect, 

 3 / -8 / long, the flowers distant; calyx- 

 lobes and petals white; capsule flattish, 

 broad, dehiscent above, the valves 

 spreading. 



In rich woods, Quebec to Minnesota, 

 North Carolina and Missouri. Ascends 

 to 2600 ft. in Virginia. A third leaf is 

 rarely borne on the scape at the base of 

 the inflorescence. April-May. 



