Heuchera. SAXIFRAGACEiE. 581 



10. H. glabella : " slightly pulverulent-pubescent, destitute of liirsute 

 hairs; sra])e naked, the flowers in a conglomerate spike; leaves wttnewliat 

 elliptical-cordate, obtuse, slii^Iitly lobed and very oliliiscly crenate, minutely 

 hirsiite-ciliale, the tectli a])iculate." JSult. — ilolocliloa glabra, ISull. viss.; 

 not Heuchera jrlabra, Willd. 



Rocky Mountains towards Oreijon ; in rocky places. — Allied apparently 

 to Heuchera cylindrica, but without hirsute hairs; liie jjlant almost fjlabrous; 

 the leaves longer than broad, somcwlial truncate at the base, with a small 

 sinus, the crcnatures apiculate with hairs." iSuttall. — We have not seen 

 this species ; it is apparently more allied to the following. 



11. H. ovalifolia (Nutt. ! mss. under Holochloa) : " minutely and some- 

 what glandularly pubescent throughout; scapes naked, slender; leaves 

 roundisli-oval, not cordate, often slightly cuneiform at the base, doubly 

 crenate or crenately incised ; flowers few, in a nearly simi)le spike ; petals 

 none ; segments of the calyx ovate, the two upjier longer." 



Blue Mountains, Oregon, on rocks, jXuttaU ! — Scjmewhat ca?spitose. Scapes 

 about a span high ; the plant wholly destitute of villous liairs. Leaves 

 about an inch in length, crenately incised and crenate, the teeth very obtuse 

 and often slightly apiculate, minutely viscid-pubescent on botli sides. — We 

 have only seen it in fruit. 



-A- 12. H. bracteata (Seringe): small, nearly glabrous ; scape leafless; leaves 

 forming a radical cluster, roundish-subcordate, incisely lobed, glabrous ; the 

 lobes short, crenately-toothed, subciliate; the teeth setaceously mucronate ; 

 panicle glomerate ; bracts lanceolate ; flowers small ; petals linear-spatulate, 

 very narrow, and, with the stamens, about the length of slightly une(|ual 

 erect se<Tments of the calyx ; styles subulate-filiform, somewhat includeil. — 

 Serinse^in DC I. c. Tiarclla ? bracteata, Torr. ! in ann. lye. New York, 

 2. p. 204. 



On the Rocky Mountains in about lat. 41°, Dr. James! — Caudex thick 

 and somewhat ligneous. Leaves scarcely more than half an inch in di- 

 ameter, cordate or truncate at the base, coriaceous. Scape 3-6 inches high, 

 slender, naked, or with 2 or 3 entire or laciniate bracts toward the summit. 

 Flowers in a spicate somewhat compound raceme about an incli long, 

 crowded. Calyx glandularly puberulenf, campanulate, deeply cleft; the 

 segments slightly obovate. Petals filiform towards the base, somewhat 

 persistent; one or two often wanting. — This remarkable alpine species, 

 much the smallest of the genus, agrees with Holochloa, i\'««. in the structure 

 of its flowers, which, however, are only about half the size of those of 

 Heuchera Americana. 



§ 4. Filaments and styles subulate, very short : calyx obconic at the base, 

 rotate, equal : petals small, fugacious : Jlowers sfiiall : panicles narrou; 

 loose. — Heucherella. 



-^ 13. H. parvifolia (Nutt. ! mss.) : scabrous-pubcrulent ; scape naked ; leaves 

 ' forming a small radical cluster, roundish-cordate, crenately 5-7-lobed, at 

 length "glabrous, ciUate ; the lobes short and rounded; panicle racemose, 

 rather loose ; bracts small, laciniate-ciliate ; flowers very small; limb of the 

 calyx flat, dilated; petals minute, caducous; stamens shorter than the 

 lobes of the calyx ; styles very short, conical. 



R(X!ky Mountains, Dr. James! Blue Mountains of Oregon, JSuttall !— 

 Caudex' somewhat hgneous, thick. Leaves an inch or more in diameter ; 

 the lobes with one or two crenatures, not mucronate. Sca])e 8-12 inches 

 high : panicle branching below. Calyx-tube obconic, adherent nearly to the 



