SA XIFRA GA CEA E. 48 1 



season. Leaves long petioled, broadly cordate, 3~7-lobed, obtuse or acutish at the 

 apex, 5-10 cm. long, crenate or dentate all around, pubescent with scattered hairs 

 above, glabrate or downy along the veins beneath; inflorescence racemose, glandu- 

 lar-puberulent; flowers white, about 6 mm. broad; petals oblong, entire or slightly 

 dentate, clawed, somewhat exceeding the white calyx-lobes; capsule reflexed, about 

 6 mm. long, its valves very unequal. In rich, moist woods, N. S. to Ont. and 

 Minn., south to Ga. and Ind. April-May. 



6. HEUCHERA L. (See Appendix.) 



Erect or ascending perennial herbs, with mainly basal long-petioled ovate or 

 orbicular leaves, and small, paniculate or racemose, white green or purple flowers, 

 on naked or leafy-bracted scapes. Calyx-tube campanulate, often oblique, adnate 

 to the base of the ovary, 5-lobed. Petals small, spatulate, often shorter than the 

 calyx-lobes, entire, inserted on the throat of the calyx. Stamens 5, inserted with 

 the petals. Ovary i-celled; styles 2, slender. Ovules oo . Capsule 2-valved, 2- 

 beaked. Seeds minutely hispid or muricate. [Named for Johann Heinrich von 

 Heucher, 1677-1747, a German botanist.] About 34 species, natives of N. Am. 

 and Mex. Besides the following, about 20 others occur in western and southern 

 N. Am. 



Stem with 1-3 leaves (seldom 4 or 5). 



Stamens slightly if at all exceeding the petals ; calyx in flower 5-8 mm. long, deci- 

 dedly turbinate at the base. i. H. pubescens. 

 Stamens about twice as long as the petals ; calyx in flower campanulate or slightly 

 turbinate. 



Stem and petioles glabrous or puberulent. 



Calyx 5-7 mm. long, cylindric-campanulate. 2. H. roseola. 



Calyx 3-4 mm. long, open-campanulate. 3. H. Curlisii. 



Stem and petioles villous; calyx in flower about 2 mm. 5. H. crinita. 



Stem strictly scapose. 



Flowers small ; calyx in flower 2-5 mm. long, only slightly oblique. 

 Petioles and scape hiisute or villous, seldom glabrate. 



Lobing of the leaves rather deep ; lobes acute ; calyx in flower about a Bam. 

 Leaves cordate ; lobes and teeth triangular. 4. H. villosa. 



Leaves mostly reniform ; lobes broadly ovate; teeth rounded, mucro- 



nate. 5. H. crinita. 



Lobing of the leaves shallow ; lobes obtuse : teeth rounded, mucronate. 

 Calyx in flower about 2 mm. long, petals white. 6. H. parviflora. 

 Calyx in flower 4-5 mm.; petals greenish or purplish. 



7. H. hirsuticaulis. 

 Petioles glabrous or puberulent ; scape rarely slightly hirsute. 



Petals spatulate, scarcely exceeding the calyx-lobes. 8. H. Americana. 

 Petals oblanceolate, twice as long as the calyx-lobes. 9. H. lancipetala. 

 Flowers large; calyx in flower 6-10 mm. long, decidedly oblique. 



Leaves sinuately lobed, crenate with very shallow and broad mucronate teeth. 



jo. H. longiflora. 

 Leaves more deeply lobed; teeth broadly ovate. n. H. hispida. 



1. Heuchera pubescens Pursh. DOWNY HEUCHERA. (I. F. f. 1846.) Stems 

 rather stout, 3-9 dm. high, densely glandular-pubescent, at least above. Basal 

 leaves slender-petioled, broadly cordate, 5-10 cm. wide, 5-7 lobed, the lobes 

 rounded or acute, crenate or dentate; panicle loose; calyx minutely glandular, its 

 lobes usually unequal ; petals broadly spatulate, purplish, slightly exceeding the 

 calyx-lobes. In rich woods, mountains of Penn. to Ky. and IS'. Car. May-June. 



2. Heuchera roseola Rydb. PINK HEUCHERA. Stem 5-6 dm. high, gland- 

 ular-puberulent, or glabrate below. Basal leaves round-cordate, 4-6 cm. wide, 

 5-7-lobed with rounded lobes, crenate with mucronate teeth, minutely hispid above, 

 hirsute on the veins beneath and ciliate on the margin; stem-leaves small, broadly 

 ovate, with sharp acuminate teeth; panicle loose, simple ; calyx glandular puber- 

 ulent, its lobes oblong, obtuse, slightly unequal; petals light pink, oblanceolate, 

 about longer than the calyx-lobes. In woods, York Furnace, Penn. May. 



3 Heuchera Curtisii T. & G. CURTIS' HEUCHERA. Stem 5-10 dm. high, 

 glabrous below, puberulent above. Basal leaves round-cordate or reniform, 38 



