SA XIFRA GA CEA E. 48 3 



ix. Heuchera hispida Pursh. ROUGH HEUCHERA. (I. F. f. 1847.) Stem 

 6-12 dm. tall, hirsutely-pubescent, glandular- puberulent, usually leafless. Leaves 

 4-7 cm. wide, with long petioles, broadly ovate-orbicular, 5-9 lobed ; panicle 

 narrow; flowering calyx deeply campanulate, very oblique, its lobes unequal; pet- 

 als spatulate, slightly exceeding the calyx-lobes; stamens slightly exserted. In 

 woods, Va. to VV. Ont., Kans. and the N. W. Terr. May-June. 



Heuchera hispida Richardsonii (R- Br.) Rydb. Very sparingly hairy ; leaves smaller, 

 about 4 cm. in diameter ; flowering calyx longer, fully 10 mm. long ; stamens scarcely at 

 all exserted. Manitoba, N. W. Terr, and Br. Col. 



7. MITELLA L. 



Erect perennial herbs, with long petioled ovate to reniform basal leaves, naked 

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

 racemes. Calyx-tube adnate to the base of the ovary, its limb 5 -lobed. Petals 

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

 bose, I -celled; styles 2, short; ovules oo . Capsule i-celied, 2-valved at the apex, 

 many-seeded. Seeds smooth, shining. [Diminutive of mi/ra, a cap, from the 

 form of the young pod.] About 12 species, natives of N. Am. and E. Asia. Be- 

 sides the following, about 7 others occur on the Pacific Coast. 



Basal leaves ovate, cordate; scape with 2 opposite leaves. i. M. dtphylla. 



Basal leaves reniform; scape naked or i-leaved near the base. 2. M. nuda. 



i. Mitella diphylla L. TWO-LEAVED BISHOP'S CAP, OR MITREWORT. (I. 

 F. f. 1848.) Scape 2.5-4.5 dm. high, pubescent, bearing a pair of opposite leaves 

 near its middle. Basal leaves acute or acuminate, 3-5-lobed, dentate, .scabrous 

 and with scattered hairs on both sides, 2.5-5 cm - l n g; leaves of the scape sim- 

 ilar, usually smaller; raceme 0.7-2 dm. long; calyx-lobes and petals white; cap- 

 sule flattish, broad, dehiscent above. In rich woods, Quebec to Minn., N. H., N. 

 Car. and Mo. April-May. 



2 Mitella nuda L. STOLONIFEROUS OR NAKED BISHOP'S CAP OR MI- 

 TREWORT. (I. F. f. 1849.) Usually stoloniferous; scape erect, slender, pubescent, 

 7-15 cm. high. Basal leaves crenate or doubly crenate, 2-4 cm. wide, pubescent 

 with scattered hairs; stem-leaves usually none; flowers pedicelled, greenish, about 

 4 mm. broad. In cold woods and peat-bogs, Newf. and Lab. to the Pacific coast, 

 N. Eng., Penn., Mich, and Mont. Also in Asia. April-June. 



8 CHRYSOSPLENIUM L. 



Low somewhat succulent mainly semi aquatic herbs, with petioled crenate leaves 

 with no stipules. Flowers minute, greenish, perfect. Calyx-tube urn-shaped or 

 obconic, adnate to the ovary, its limb 4-5-lobed. Petals none. Stamens 8-10 

 (rarely 4 or 5), inserted on the margin of a disk; filaments short. Ovary i-celled, 

 flattish, 2- lobed; styles 2, short, recurved; ovules oo . Capsule membranous, short, 

 inversely cordate or 2-lobed, 2-valved above. Seed-coat muricate or pilose. [Greek, 

 golden spleen, from some reputed medicinal quality.] About 15 species, natives of the 

 north temperate zone and southern S. Am. Besides the following, 2 others occur in 

 northwestern America. 



Lower leaves opposite: flowers mostly solitary. i. C. Americanum. 



Leaves all alternate ; flowers corymbose. 2. C. lowensis. 



1. Chrysospleniurn Americanum Schwein. GOLDEN SAXIFRAGE. WATER 

 CARPET. (I. F. f. 1850.) Stems decumbent, forked above, glabrous or very 

 nearly so, 7-20 cm. long. Lower leaves opposite, the upper often alternate, broad- 

 ly ovate, orbicular or somewhat reniform, obtuse or trur.cate at the base, rounded 

 at the apex, 4-20 mm. wide; flowers sessile, axillary, about 2 mm. broad; calyx- 

 lobes commonly 4, yellowish, or purplish within; stamens commonly 8; anthers 

 orange-red. In wet, shaded places, N. S. to the Sask. region, south to Ga., and to 

 Ohio and Minn. March-June. 



2. Chrysosplenium lowensis Rydb. IOWA GOLDEN SAXIFRAGE. (I. F. 

 f. 1851.) Flowering stems, 1-7 cm. high, branched above. Leaves reniform, 

 thin, shining above, pale beneath, 4-10 mm. wide, or crenate with 5-7 rather 

 broad lobes ; upper stem-leaves larger than the lower ; calyx lobes commonly 



