Lewisia. PORTULACACEJE. 267 



Bot. Misc. i. 345, t. 70, & Fl. Bor.-Am. i. 223 ; Hook. & Arn. Bot. Beech. 344, 

 t. 86 ; Wats. Bot. King Exp. 44 ; Brew. & Wats. Bot. Calif, i. 78. The genus 

 is here considerably extended to include the thick-rooted perennial section of 

 Calandrinia (§ Pachyrrhizea, Gray, Proc. Am. Acad. xxii. 276), rightly sepa- 

 rated from Calandrinia by Th. Howell on the very different dehiscence of the 

 capsules. Mr. Howell's genus Oreobroma (Erythea, i. 31), however, cannot be 

 distinguished from Lewisia by a single constant or satisfactory generic character 

 as well indicated by K. Brandegee, Proc. Calif. Acad. Sci. ser. 2, iv. 86. [Re- 

 vised and extended by B. L. Robinson.] 



§ 1. Sepals or sepaloid bracts 4 to 8 (in L. rediviva, var. (?) Yosemitana, 

 reduced to 2). 



* Scape jointed above the middle and bearing an involucre of 2 or more scarious subulate 

 bracts : cotyledons accumbent. — Lewisia proper. 



L. rediviva, Pursh, 1. c. (Bitter-root, Racine d'Am^re.) Leaves in a dense tuft, 

 usually shorter than the scapes, inch or two long, subclavate : involucre of 5 to 7 subulate 

 scarious bracts : sepals 6 to 8, strongly imbricated, broad-oval, somewhat petaloid : corolla 

 bright rose-color varying to white, of 12 to 16 oval or at length spatulate (an inch or more 

 long) petals, rotately spreading in sunshine : stamens 40 or more : style-branches about 8. — 

 Hook. f. Bot. Mag. t. 5395.1 L. alba, Kellogg, Proc. Calif. Acad. Sci. ii. 115, f. 36. — Rocky 

 Mountains from north of British boundary to Wyoming and Utah, west to the Cascade 

 Mountains and Sierra Nevada down to San Bernardino Co., and Arizona, and even on 

 Monte Diablo of tlie Contra Costa range, California. 



Var.* (? ) Yosemitana, K. Brandegee, 1. c. 89. Closely similar to the type in habit, 

 but very depauperate and with the number of parts in the flowers much reduced : sepals 2, 

 broad, concave, and emarginate : petals 5. — Yosemite Valley, Calif., Mrs. W. F. Dodd. 



* * Scapes not jointed near the middle but just beneath the calyx proper, the bracts from 

 the joint 2, decussate with 2 sepals, which they usually closely subtend and much resem- 

 ble : cotyledons incumbent or oblique. 



L.* Kelloggii, K. Brandegee. Dwarf: leaves spatulate, obtuse or retuse ; blades 6 lines 

 to an inch in length ; the petioles thick, very broad below ; outer leaves bractlike being broad 

 oblong-lanceolate scarious phyllodia : peduncles 4 to 7 lines in length, jointed at the base : 

 involucre none : sepals 4, oblong-lanceolate, acute, finely glandular-toothed, 3 to 4 lines in 

 length: petals 5, white, at least twice as long: stamens 12 to 15: style-branches 5; coty- 

 ledons oblique (ace. to Mrs. Brandegee). — Proc. Calif. Acad. Sci. ser. 2, iv. 88. L. hrachy- 

 calyx, Greene, Fl. Francis. 176, not Engelm. — Granitic sand on the Sierra Nevada Mts., 

 Central California, at Cisco, Kellogg (1870); Sierra Nevada, without exact locality, 3/«/r 

 (1872); and in Plumas Co., Mrs. Austin (1877). Clearly distinguished from the following 

 species by its glandular-denticulate sepals. 



L.* brach^calyx, Engelm. Leaves spreading in an open rosulate cluster, spatulate and 

 oblanceolate, moderately fleshy, 1 to 4 inches long (including the margined petiole), sur- 

 passing the scapes ; sepals 4, decussate, oval to oblong, much short^r than the corolla, outer 

 pair narrower : petals 5 to 9, cuneate-obovate, white, sometimes purple-veiny, half inch to 

 almost inch long: stamens 10 to 15: style-branches 5 to 7. — Engelm. in Gray, Proc. Am. 

 Acad. vii. 400 ; Wats. 1. c. 45 ; Brew. & Wats. Bot. Calif, i. 79. — In wet ground, mountains 

 of Arizona, Newberry, Palmer ; S. Utah, Parry, &c. ; San Bernardino Co., Calif., Parish. 



§ 2. Oreobroma, Howell, 1. c, as genus. Calyx of 2 sepals, without closely 

 subtending bracts. 



* Root stout, more or less elongated, at least oblong-conical, bearing at its summit one or 

 more short thick erect caudices. 



1 Add Garden, xxxi. 124, t. 582 ; Paillieux & Bois, Bull. Soc. Nat. Acclimat. xxxvi. 443-448 

 (1889), with wood-cut. 



