178 SAXIFRAGACEAE. {Von II. 
1. Tiarella cordifolia I. Coolwort. 
False Mitrewort. (Fig. 1842.) 
Tiarella cordifolia I,. Sp. Pl. 405. 1753+ 
Scape 6/12’ high, slender, pubescent. Leaves 
long-petioled, broadly ovate, or nearly orbicular, 
cordate at the base, 3-7-lobed, obtuse or acutish 
‘at the apex, 2/’-4’ long, crenate or dentate all 
around, pubescent with scattered hairs above, 
glabrate or downy along the veins beneath; in- 
florescence simply racemose or the lowest pedi- 
cels sometimes branched, glandular-puberulent; 
flowers white, about 3/’ broad; petals ob- 
long, entire or slightly dentate, clawed, some- 
what exceeding the white calyx-lobes; capsule 
reflexed, about 3’ long, its valves very unequal. 
In rich, moist woods, Nova Scotia to Ontario and 
Minnesota, south, especially along the mountains, to 
Georgia, Indiana and Michigan. Ascends to 5600 ft. 
in Virginia. April-May. 
6. HEUCHERA L.. Spy Ply 226.) 753: 
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 1-celled; styles 2, slender; 
Ovules o. Capsule 2-valved, 2-beaked. Seeds minutely hispid or muricate. [Named for 
Johann Heinrich von Heucher, 1677-1747, a German botanist. ] 
About 21 species, natives of North Americaand Mexico. Besides the following, about 13 others 
occur in the western parts of North America. 
Flowering calyx 1/’-11s"' long. 
Leaves thin, reniform, very obtusely lobed. 1. H. Rugelit. 
Leaves firm, orbicular-ovate, acutely lobed. 2. H. villosa. 
Flowering calyx 1}34'’-3'' long. 3. H. Americana. 
Flowering calyx 3'’-5’' long. 
Panicle loose. 4 
Panicle narrow, strict. 5 
. HH. pubescens. 
. AH. hispida, 
1. Heuchera Rugélii Shuttlw. 
Rugel’s Heuchera. 
(Fig. 1843.) 
Heuchera Rugelit Shuttlw.; Kunze, Linnaea, 
20: 43. 1847. 
Stems slender, 6’—24’ long, weak, glandu- 
lar-hirsute or villous, leafless or bearing a 
few leaves below. Basal leaves with long 
slender glandular-villous petioles, broadly 
reniform, 2’-5’ wide, cordate at the base, 
with 7-9 broad rounded or rarely pointed 
lobes, crenately toothed, the teeth mu- 
cronate; inflorescence very loosely panicu- 
late; flowering calyx regular, campanulate, 
about 1’” long; petals linear-spatulate, 2-3 
times as long as the calyx-lobes; stamens 
somewhat exserted. 
Shaded cliffs, Missouri and Illinois to west- 
ern North Carolina, July-Sept. 
