_>.!li SAXIFRAGACEAE (SAXIFRAGE FAMILY) 



unilateral), more or less glandular-puberulent: calyx campanulate, slightly 

 oblique: petals spatulate, slightly exceeding the calyx-lobes: stamens not at 

 any time exserted. From northern Colorado to Idaho and Montana; prob- 

 ably in Utah. 



7. Heuchera parvifolia Nutt. T. & G. Fl. N. A. 1: 581. 1840. Scapes slen- 

 der, 2-6 dm. high, decidedly glandular-puberulent: leaves crowded on the 

 caespitose crowns of the caudex, orbicular-cordate or subreniform, crenately 

 5-7-lobed: inflorescence at first crowded and seemingly spicate, at length a 

 long narrow panicle, minutely glandular-puberulent: calyx obconical: petals 

 small broadly spatulate, barely exceeding the calyx-lobes: stamens not at any 

 time exserted. (H . flabellifolia and H.utahensis Rydb. N. A. Fl. 22: 115. 

 1905.) Very common on rocky ridges and steep slopes; from New Mexico to 

 British America. 



8. Heuchera Williamsii Eaton, Bot. Gaz. 15: 62. 1890. Scape altogether 

 naked, minutely glandular-puberulent, 3-4 dm. high: leaves rather few, 

 closely basal, short-petioled, reniform, 2-3 cm. broad, crenulate and scabro- 

 ciliate on the margin : inflorescence a simple raceme, the flowers short -pediceled 

 and rather distant : calyx turbinate : petals spatulate, with long slender claw, 

 3-4 times as long as the calyx-lobes: stamens not exserted. (This is thought 

 by some botanists to be a Tellima and by Rydberg has been made a new genus 

 Conimitella.) Northern Wyoming and Montana. 



3. MITELLA L. MITERWORT 



Low and slender perennials, with round-cordate alternate leaves on the 

 crown of the rootstock; those on the scape (if any) opposite. Flowers in a 

 simple slender raceme or spike. Calyx 5-cleft, short, adnate to more or less 

 of the ovary. Petals pinnatifid, 3-cleft, or entire. Stamens 5, nearly sessile. 

 Styles very short. Capsule depressed. (Ozomelis and Perctiantkia Raf.) 



Stamens opposite the greenish pinnatifid petals . . . . .1. M. peritandra. 



Stamens alternate with the white trifid or entire petals. 

 Leaves pilose; petals trifid. 



Petals much longer than the calyx . . . . . . 2. M. staurqpetala. 



Petals scarcely longer than the calyx. . . . . . 3. M. Parryi. 



Leaves puberulent; petals entire . . . . . . . 4. M. violacea. 



1. Mitella pentandra Hook. Bot. Mag. 56 pi. 2933. 1829. Sparingly pu- 

 bescent with short white hairs; scapes slender, 1-3 dm. high: leaves cordate 

 to round-reniform, obscurely 3-5-lobed, unequally serrate, 2-3 dm. in diam- 

 eter: flowers numerous, in a sub paniculate raceme: calyx short-campanulate, 

 the very short obtuse lobes green: petals pinnate with 7-9 approximate fili- 

 form pinnae: filaments very short, inflexed. In wet places, on the highest 

 mountains; Alaska to Oregon and the Rocky Mountains. 



2. Mitella stauropetala Piper, Erythea 7: 161. 1899. Scapes naked, 3-5 

 dm. high, slender, sparsely pubescent below, minutely glandular-puberulent 

 above: leaves orbicular, indistinctly 5-lobed, simply or doubly crenate, but not 

 strongly so, reniform with narrow sinus, sparsely pilose on each surface and 

 ciliate with reddish or white hairs: raceme 6-12 cm. long, 10-25-flowered, 

 strictly secund; flowers white, sometimes violet-tinged, 4-5 mm. long: calyx- 

 lobes erect, oblong-obovate: petals nearly twice as long as the calyx-lobes, 

 filiform. .'J-pnrlcd nearly half their length into linear lobes, the lateral lobes 

 divaricate: stamens short and included. From Colorado to Idaho and Wash- 

 ington. 



3. Mitella Parryi (Piper) A. Nels. Smaller in everyway, 1.5-3 dm. high: 



slender: leaves 2 cm. in diameter, doubly and conspicuously crenate, 

 Sparsely pilose as are also the petioles: petals mostly 3-parted at the apex, 

 only half as long as in the preceding and scarcely surpassing tho calyx: stamens 

 yen -hurt. (M . atenopetala Parryi. Piper, 1. c. 162.) Colorado and Wyoming 

 ami probahlv westward. 



1. Mitella ' violacea Kydl>. Bull. Torr. Bot. Club 24: JIN. ls<)7. Scapes 

 .slender, nake.l. :; f> dm. high, minutely puberulent : leaves orbicular, obscurely 

 5-lobed, reniform with a broad sinus, very minutely puberulent on each side, 



