200 



SAXIFRAGACE.E. Miitlla. 



2 or 3 inchos in (Uaiucacr : Hcapo lotillesa, a spun liigli, 10- 2()-llo\veml : llowers 

 grueiiish : peliils pecLinalcly unco or ovon twice pinnutuly parted : stamens 5, opi)o- 

 bite the calyx-lobes. — Troc. Am. Acail. vi. 533. 



Woods of the Siurni Ni'vailii iit 6,000 to 11,000 feet, Marii)osa Co. {JJrcar.r, &c.) to Siena Co., 

 Torrcij, Lcinino)i. Cuiiilhiiy luultilid iicUils t Hues long, imicli excelling the calyx. 



2. M. trifida, Omliam. Leaves all from tlie rootstock, rouud-reniibrm or (ni 

 date, crenately toothed and sometimes incised or lobed, thinnish, sparsely liauy, 1 

 to 3 inches in diameter : scape lililorm, a span to a loot high : llowers whitirih, 

 numerous and rather scattered in the commonly one-sideil slender sijike or .s|)ike- 

 like raceme ; the peilicels mostly very short : petals 3-5-i)arted, small : stamens f), 

 opposite the calyx-lobes. — Hook. Fl. i. 24:1, t. 82. 



Mountain woods of Mundoiino Co. (Ilu/nndcr), thcnLc uoiUi to Hiiti.sli Cohnnliia and in tlie 

 Rocky Mountains. 



M. i-ENrANUi!A, Hook. 1. c. & liot. Ma<,'. t. 2'J\io, of the Rocky Mountains, is another .species 

 with naked scape and 5 stamens, but the hitter opposite tlie petals. 



M. CAULESCENS Nutt., has oiic or more alternate j)etioled leaves on the Howering stem or 

 scape, similar to those of the rootstock anil runners, a loose raceme, and the 5 stamens alternate 

 with the pinnatilid petals. It extends from British C^ohimbia to Oregon, and may probalily 

 occur on the northern borders of the State. 



M. NtMiA luitl M. Dii'iiYi.i.A lire the two binnuean'and lO-undmus s|H'.cies. Thi^ hirnier exti'iids 

 wostwiird 1o liritish Cubunliin, and nrura in N. Siberia ; tlui liiller Im only an Allanli<' f<pii us. 



8. HEUCHERA, Lnm. Alum-koot. 

 Calyx campanulate, 5-lobed ; the lobes imbricated in the bud, obtuse, sometimes 

 rather unequal ; the tube coherent with the lower half of the ovary. Petals 5, un- 

 guiculate, small and entire, sometimes minute or wanting or early deciduous, inserted 

 on the throat of the calyx. Stamens 5 : filaments either slender and long, or some- 

 times rather shorter than the calyx : anthers 2-celled. Ovary and capsule 1 -celled, 

 with 2 parietal placentoi, more or less 2-beaked ; the beaks tapering into either 

 filiform and elongated or subulate and shorter styles ; deliiseent between the beaks. 

 Seeds numerous, oval or globular, with a close crustaceous black coat, minutely 

 muricate-roughened. — Herbs (all N. American) ; with stout rootstocks, sending up 

 slender-petioled rounded and mostly cordate many-toothed and somewhat lobed 

 leaves, and scapes or alternately 1 - 3-leaveil llowering stems, bearing numerous 

 small and mostly dull-colored llowius ; the cymosc clusters either open in a loose 

 ample panicle, or sometimes comlcnsed into a spike-like thyrsus. Scarious stipules 

 adnata or partly distinct. 



There are about five species in the Athmtic States, as many more ]ieciiUar to the Rocky JNloun- 

 tain region, and the following in California, Oregon, kc. A sterile plant collected on fiuadalupe 

 Island by Dr. Palmer may belong to a peculiar Lower Californian species. 



§ 1. Floioers in an open or somctwies more condensed and thyrsoid jxinide : jUaineida 

 more or less Jiliform, mostly exserted. 



>k Calyx ohloiig-camjianulate, commonly tinxjed with jmrple or rose-color. 



1. H. rubescens, Torr. Scape a span to a foot liigh, from stout creeping root- 

 stocks, nearly glabrous : leaves thickish, rounded, crenately lobed and toothed, an 

 inch or less in diameter : flowers loosely panided : calyx 2 lines long, more or less 

 acute at base : filiform filaments and styles and very slender white or flesh-colored 

 petals conspicuously exserted. — Stansb. Kep. 388, t. 5 ; Gray, PI. Wright, ii. 63 ; 

 Watson, Bot. King Exp. 90. 



Common in the Sierra Nevada, on rocks, at 5,000 to 11,000 feet, extending to Utah and New 

 Mexico. 



