SAXIFRAGACEAE. 



[Vox,. II. 



i. Tiarella cordifolia I,. Coohvort. 

 False Mitrewort. (Fig. 1842.) 



Tiarella cordifolia L- Sp. PI. 405. 1753. 



Scape 6'-i2' high, slender, pubescent. Leaves 

 long-petioled, broadly ovate, or nearly orbicular, 

 cordate at the base, 3-7-lobed, obtuse or acntish 

 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. / 



in Virginia. April-May. 



Ascends to 5600 ft. 



6. HEUCHERA L. Sp. PI. 226. 1753. 



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 muricatc. [Named for 

 Johanu Heinrich von Heucher, 1677-1747, a German botanist.] 



About 21 species, natives of North America and Mexico, 

 occur in the western parts of North America. 



Flowering calyx i"-i$4" long. 



Leaves thin, reniform, very obtusely lobed. 



Leaves firm, orbicular-ovate, acutely lobed. 

 Flowering calyx iVi"-3" long. 

 Flowering calyx 3" -5" long. 



Panicle loose. 



Panicle narrow, strict. 



i. Heuchera Rugelii Shuttlw. 



Rugel's Heuchera. 



(Fig. 1843.) 



Heuchera Rugelii 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 loogely panicu- 

 late; flowering calyx regular, campanulate, 

 about \" 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. 



Besides the following, about 13 others 



1. ff. Rugelii. 



2. ff. villosa. 



3. //. Americana. 



.}. //. pubescent. 

 5. ff. hispida. 



