134 SAXIFRAGACEAE 



Refs. — MiTELLA PENTANDRA Graham; Hook. Bot. Mag. t. 2933 (1829), type loc. alpine woods, 

 n. Rocky 'Mis., Drummoncl ; Jepson, Man. 4G2 (1925). Pectiantia pcntandra Rydb. N. Am. Fl, 

 22:93 (1905). 



n. HEUCHERA L. Alum Root 



Perennial lierbs Avith stout rootstocks. Leaves mostly basal, the blades rounded 

 and shalloAvy lobed. Flowering stems scape-like, bearing a panicle of small flowers 

 in cymose clusters. Calyx-tube adnate to the lower i^ of the ovary. Petals white, 

 very small, clawed, entire, inserted on the throat of the calyx, or sometimes none. 

 Stamens 5, ours with slender filaments. Capsule 1-celled, with 2 parietal placen- 

 tae, dehiscent between the 2 beaks. — Species 27, North America. (J. H. Heucher, 

 1677-1747, German professor of medicine.) 



Inflorescence spike-like; stamens shorter than the calyx-lobes; transmontane. 



Calyx 1 to 1 Mi lines long; petals present; se. Cal 1. H. novomexicana. 



Calyx 2 to 3 lines long; petals none; ne. Cal 2. H. glabella. 



Inflorescence paniculate; stamens equal to or exceeding the calyx-lobes; cismontane except no. 6 

 which occurs both east and west of the Sierran axis. 

 Petioles 1 to 8 inches long; leaf -blades 1 to 4 inches long. 



Calyx turbinate, greenish, thinly pilose, Vz to IVi lines long 3. H. micrantha. 



Calyx hemispheric, reddish, hirsute, often densely so, 1 to 2 lines long. 



Leaf-blades rather conspicuously lobed; panicle narrow but not dense..4. JBT. maxima. 



Leaf -blades shallowly lobed; panicle much contracted, rather dense 



5. n. pilosissima. 

 Petioles V2 to 3 inches long; leaf-blades i/^ to IV2 inches long; calyx reddish or purplish, the 

 lobes greenish-tipped; lower part of calyx usually puberulent with short gland- 

 tipped hairs, the middle and upper portion more or less pilose. 



Calyx turbinate-campanulate to cylindrie; panicle loose 6. H.ruhescens. 



Calyx hemispheric; panicle dense 7. H. merriamii. 



1. H. novomexicana Wheelock. Range Alum-root. Plants 6 to 12 inches 

 high, glandular-puberulent; scapes slender; leaf -blades 4 to 8 lines broad, roundish- 

 cordate, the lobes roundish, ciliate ; petioles % to 2 inches long ; calyx turbinate to 

 campanulate, yellowish ; petals white, oval, shortly clawed, inconspicuous ; ovary 

 imbedded in the yellowish disk. 



Rocky slopes, 10,000 to 11,000 feet: White Mts., Inyo Co. Southeast to New 

 Mexico. July. 



Locs. — North Fork Crooked Creek, Jepson 7260; County Line HUl, Jepson; Big Prospector 

 Mdw., J. Grinnell. 



Refs. — Heuchera novomexicana Wheelock, Bull. Torr. Club 17:200 (1890), type loc. 

 Santa Rita, N. Mex., Wright 1098; Jepson, Man. 463 (1925). 



2. H. glabella T. & G. Mat Alum-root. Plants 6 to 14 inches high; scapes 

 stoutish; herbage minutely puberulent, the leaf -blades glabrous or minutely ciliate; 

 leaf -blades orbicular to broadly ovate, truncatish at base or rarely sub-cordate, 

 shallowly lobed or toothed, 5 to 12 lines broad, the rounded teeth mucronulate; 

 calyx yellowish, campanulate, puberulent; petals none or inconspicuous. 



Montane, forming mats in rock clefts, 8000 to 9000 feet : Modoc Co. North to 

 British Columbia. July. 



Logs. — Medicine Lake, M. S. Baker; Mt. Bidwell, Jepson 7880; Mill Canon, Warner Mts., 

 Manning 274. 



Refs. — Heuchera glabella T. & G. Fl. 1:581 (1834), type loc. "Rocky Mts., towards Ore- 

 gon", Nuttall. H. cylindrica var. glabella Wheelock, Bull. Torr. Club 17:203 (1890); Jepson, 

 Man. 463 (1925). 



H. CYLINDRICA Dougl. docs not occur in Cal. probably. Its inclusion in Jepson, Man. 463, 

 was an inadvertence. 



3. H. micrantha Dougl. Crevice Alum-root. (Fig. 152.) Plants 1 to 3 feet 

 high; scapes sometimes with a few more or less reduced leaves; petioles and scapes 

 pilose-hirsute, the leaf -blades hirsutulous and the inflorescence glandular-puberu- 

 lent; leaf -blades round- or ovate-cordate, 2 to 4 inches long, obtusely lobed and 

 crenately toothed; flowers in an ample loose panicle; calyx shorter than the slender 



