380 SAXIFRAGACEAE 



Petals 3-fld to the middle; hypanthium with the sepals 4-5 mm. long. 



3. O. stauropetala. 

 Petals entire or 3-fld only at the apex; hjTjanthium with the sepals 1.5-3 nxm. long. 

 Hypanthium with sepals 2-3 mm. long; leaf-blades indistinctly lobed and with 



shallow crenulations ; petals often entire. 4. O. stenopetala. 



Hj-panthium with the sepals 1.5-2 mm. long; leaf -blades distinctly lobed and 

 deeply crenate; petals 3-cleft. 5. O. Parry i. 



1. O. trifida (Graham) Rydb. Flowering branches 2-3 dm. high, naked, 

 glandiilar-puberulent; leaf-blades reniform, 2-4 cm. broad, 7-9-lobed, with 

 broad shallow rounded lobes and crenate, sparingly hairy on both sides; raceme 

 short, 2-6 cm. long; hypanthium with the sepals 3 mm. long; sepals green, tri- 

 angular-ovate. Mitella trifida Graham. Wet woods: Alta. — B.C. Mont. 

 My-Au. 



2. O. violacea Rydb. Flowering branches 2-3 dm. high, naked, glandular- 

 puberulent; leaf-blades broadly cordate in outline, slightly 5-7-lobed with 

 rounded, finely crenate lobes; racemes short, with almost sessile flowers; hypan- 

 thium with the sepals 3 mm. long and 2 mm. wide; sepals ovate, obtuse. M. 

 violacea Rydb. Mossy banks in woods: Mont. Suhmont. Je-Jl. 



3. O. stauropetala (Piper) Rydb. Flowering branches naked, 3-5 dm. 

 high, glandular-puberulent throughout, or slightly hirsute below; leaf -blades 

 rounded-reniform, indistinctly 5-9-lobed, with round crenate lobes, sparing hir- 

 sute on both sides; racemes rather elongate; pedicels about 1 mm. long; sepals 

 oblong-ovate; petals fully twice as long as the sepals. M. stauropetala Piper. 

 Springy places in woods: Mont. — -Colo. — -Ore. — Wash. Mont. My-Jl. 



4. O. stenopetala (Piper) Rydb. Flowering branches leafless, 3-5 dm. 

 high, puberulent; leaf-blades rounded-reniform, 2-6 cm. wide, ciliate on the 

 margin, indistinctly round-lobed and crenate; raceme secund, often 1 dm. long; 

 flowers almost sessile; sepals whitish, oblong, obtuse; petals about half longer 

 than the sepals. M. trifida S. Wats. M . stenopetala Fiper. Damp places: Utah 

 — Colo.— Wyo. Mojjt. Je-Jl. 



6. O. Parryi (Piper) Rydb. Flowering branches leafless, 1.5-3 dm. high, 

 glandular-puberulent above, slightly hairy below; leaf-blades 2-3 cm. wide, 

 reniform, sparingly hairy on the veins and the margin, more distinctly lobed 

 than in the preceding, deeply crenate; racemes 2-7 cm. long, often secund; 

 flowers nearly sessile; sepals whitish, rounded-oblong, obtuse; petals about half 

 longer than the sepals. M. stenopetala Parryi Piper. Mountains: Wyo. — 

 Colo.— Utah. Mont. My-Au. 



8. CONIMITELLA Rydb. 



Perennials, with scaly cespitose rootstocks and scapiform lateral flowering 

 branches. Inflorescence racemose. Leaves basal, long-petioled, with reniform 

 blades. Hypanthium elongate, turbinate, regular, adnate to the larger part 

 of the ovary. Sepals 5, oblong, erect. Petals 5, long-clawed, spatulate, entire. 

 Stamens 5; filaments very short. Gynoecium mostly inferior, one-celled, with 

 2 parietal placentae and numerous ovules; stigmas subsessile, capitate. Seeds 

 muricatc. 



1. C. Williamsii (D. C. Eaton) Rydb. Flowering branches leafless, 4-6 dm. 

 high, glandular-puberulent; leaf-blades reniform, thick, shining, 3-4 cm. wide, 

 indistinctly round-lobed and crenate, hispid-ciliate on the margin, often tinged 

 with red; raceme short, 3-10 cm. long, 6-12-flowered; hypanthium 3-4 mm. (in fruit 

 8-10 mm.) long, finely puberulent; sepals oblong, 1 mm. long, obtuse, yellowish; 

 petals 5-6 mm. long, narrowly spatulate. Heuchera Williamsii D. C. Eaton. 

 Tellima nudicaulis Greene. Tellima penlarulra Canby. Lithophragma William.ni 

 Greene. Hillsides and open places: Mont. — Ida. — Wyo. Submont. — Mont. Je- 

 Jl. 



9. HEUCHERA L. Alum-root, Kali.spell. 



Perennials, with scaly rootstocks and lateral flowering branches, which are 

 either scapiform or leafy. Basal leaves petioled, with j)almately veined, broad 

 blades. Inflorescence paniculate. Hypanthium cylindric to saucer-shaped, 



