3092 



SAXIFRAGA 



SAXIFRAGA 



Allionii, Hort.). Laxly cespitose, robust, 3-6 in. high: 

 Ivs. long-petioled, 3-5-lobed at the apex; the lobes 

 short and very obtuse: infl. many-fld., paniculate: fls. 

 white; petals broader and obovate. Switzerland. Var. 

 atropurpftrea, Sternb. (S. atropurpiirea, Sternb. S. 

 muscoides var. atropurpiirea, Ser. S. muscoides var. 

 pur pur ea, Sternb.), has the petals dark purple and 

 sometimes obovate-oblong. G.W. 5, p. 254. G.M. 

 58:1. Var. compacta, Correv. (S. muscoides var. com- 

 pdcta, Koch). Tufts small and very dense: Ivs. densely 

 imbricate: sts. usually 1-fld., often scarcely J^in. high. 

 Var. densa, Hubb. (S. muscoides var. densa, Hort. S. 

 densa, Hort., not Willd.), has the foliage so tightly 

 packed as to give the effect of turf: fls. white. Var. 

 Fergusonii, Hubb. (S. Fergusonii, Hort.). Free- 

 flowering, so much so as nearly to hide the vivid green 

 carpet of foliage : fls. bright crimson, in clusters on very 

 short sts. "GuUdford Seedling," also treated as a form 

 of S. muscoides and S. Rhei, appears to be nothing more 

 than a later-flowering form of var. Fergusonii. Gn.W. 

 23:427. Var. pygm&a, Engl. (S. pygmaza, Haw. S. 

 muscoides var. pygmsea, Hort.). Densely cespitose: 

 the Ivs. rather thick, all entire, the apex rotund-obtuse 

 or with three crenatures. Var. Rhei, Hort., also spelled 

 Rhaei and Rhcei (S. Rhei, Schott. S: cespitosa var. 

 Rhei, Hort. S. muscoides var. Rhei, Hort.). Forms 

 mossy hillocks covered in April and May with masses 

 of rather large rose-colored fls. Grows about 6 in. high. 

 A form of this more commonly cult., is known as S. Rhei 

 superba or S. muscoides Rhei superba, and has a more 

 robust habit and larger deeper colored fls. 



Section VII. BORAPHILA (SPATHULAHIA, MICRANTHES). 



A. Petals lanceolate, clawed, usually 



somewhat unlike. 



B. Infl. without bulblets: fls. numerous. 37. leucanthemi- 

 BB. Infl. with bulblets: fl. solitary at the [folia 



end of the main st 38. bryophora 



AA. Petals obovate or obovate-rotundate, 



about alike. 

 B. Lvs. more or less spatulate, ovate, or 



obovate. 



c. The Ivs. thin and herbaceous. 

 D. Lf. -blades about as broad as 



long. 



E. Infl. many-fld., corymbose- 

 paniculate: sepals not re- 

 flexed 39. davurica 



EE. Infl. few-fld., loosely panicu- 

 late: sepals reflexed 40. Lyallii 



DD. Lf. -blades elongated 41. mi cranthi di- 

 ce. The Ivs. thick, leathery. [folia 

 D. Blades of Ivs. elongated or elon- 



gate-cuneate. 



E. Margins of the oblanceolate or 

 oblong-spat ul ate Ivs. 

 remotely short-dentate: 

 petals oblong-linear o r 



linear-lanceolate 42. pennsylvanica 



EE. Margins of the ovate-oblong 

 Ivs. entire or slightly sinuate- 



crenate: petals obovate 43. integrifolia 



DD. Blades of Ivs. ovate or obovate. 

 E. Cymules compact or closely 

 corymb-like at maturity: Ivs. 



roundish ovate 44. nivalis 



EE. Cymules open and often ra- 

 ceme-like at maturity: Ivs. 

 ovate, obovate or spatulate. . 45. virginiensis 

 BB. Lvs. reniform or suborbicular. 



c. Bulblets lacking in the axils of the 



basal Ivs 46. punctata 



cc. Bulblets present in the axils of the 



basal Ivs 47. Mertensiana 



37. leucanthemifdlia, Michx. (S. Michaiixii, Brit. 

 Spatularia petioldris, Small). Five to 15 or more in. 

 high, caudicles short: Ivs. short-pilose on both sides, the 

 basal fleshy, bright green, long-spatulate, cuneate- 

 attenuate to the margined petiole, coarsely dentate, the 

 teeth equal and acute; lower bracts linear-lanceolate, 



narrowly dentate, upper ones nearly entire: infl. 1 or 

 more scapes arising from the axils of the basal Ivs. and 

 branching paniculate from the middle, with the 

 branches more or less diffuse; pedicels slender: fls. 

 white, numerous and star-like; sepals lanceolate; petals 

 unequal, the 3 larger ones with 2 light yellow spots at 

 their cordate base, twice as long as the sepals: fr. ovate. 

 June. Mountains of Va. to N. C. and Ga. L.B.C. 

 16:1568. B.M. 2959. B.B. 2:176; (ed. 2) 2:221 (as 

 Hydatica petiolaris), 



38. bryophora, Gray (Spatularia brydphora, Small). 

 Two to 8 in. high, slender: Ivs. 1 in. or less long, basal 

 rather far apart, rosulate at the top of the slender 

 caudicles, oblong-elliptic to oblanceolate, obtuse, entire, 

 ciliate: infl. solitary or tufted naked scapes, panicu- 

 lately branched, the branches erect-spreading, 1-fld. 

 at the end of the main st.; pedicels drooping: fls. white; 

 sepals oblong to ovate; petals unequal, the 3 upper 

 ovate with 2 spots at their cordate base, the 2 lower 

 ovate, with abruptly narrowed base. Sierra Nevada 

 Mts., Calif. At one time offered by dealers in native 

 plants. 



39. davurica, Pall., also spelled dahurica (Micrdn- 

 thes davurica, Small). Three to 8 in. high: rhizome 

 thick: Ivs. basal, rather stiff, forming a rosette, sparsely 

 covered with very short hairs, obovate-cuneate, 

 rounded at the apex, deeply and evenly dentate, teeth 

 ovate, acute, blades cuneate-attenuate at the base to 

 the petiole which is membranaceous sheathing at its 

 base; bracts oblong-lanceolate, the lowest of them 

 oblong-cuneate : infl. erect naked scapes, which are 

 solitary or several together, and are covered with very 

 slender canescent, partly glandular hairs, many-fld. 

 and corymbose-paniculate branched from the middle; 

 pedicels filiform: fls. white, numerous; sepals yellow- 

 green, ovate, rather acute, erect-spreading and not 

 reflexed in age; petals obovate-oblong, scarcely twice 

 as long as the sepals. E. Siberia and the islands of 

 Bering Sea. Much of the so-called American S. davurica 

 and apparently more or less of the material cult, as S. 

 dahurica is really S. Lyallii from which it differs in 

 having the peduncles hairy instead of glabrous and 

 many- instead of few-fld., smaller fls. and other charac- 

 ters. Somewhat similar to S. virginiensis. 



40. Lyallii, Engl. (S. dahurica, Lyall. Micrdnthes 

 Lyallii, Small). Four to 15 in. high: rhizome slender: 

 Ivs. fresh green, obovate ("flabellate, varying to sub- 

 orbicular or reniform-flabellate"), cuneate, attenuate to 

 a basally dilated petiole, equally serrate-dentate above, 

 glabrous, almost nerveless: infl. 6-10-fld. loosely 

 paniculate scapes which are naked, slender, erect, almost 

 glabrous, with very slender, erect^spreading later erect 

 pedicels which are purple almost glabrous: fls. milk- 

 white; calyx purple, the sepals ovate-triangular, 

 reflexed; petals obovate-rotund, slightly clawed, 1- 

 nerved. Rocky Mt. region, Brit. Col., Alaska, and 

 Bering Sea region. Has been confused with S. davurica, 

 Pall., which see. 



41. micranthidifolia, Steud. (S. erosa, Pursh. 

 Micrdnthes micranthidifolia, Small). Up to 3 ft. high: 

 Ivs. all basal, oblong or oblanceolate, obtuse, attenuate 

 to a flat petiole which is partly clasping at the base, erose- 

 dentate, sparsely and also very shortly pilose, margin 

 short-ciliate: infl. paniculate, loosely fld. and elongated, 

 borne on a tall softly pilose scape; pedicels filiform, 

 densely covered with slender glandular hairs, viscid: 

 fls. numerous, white; sepals linear-lanceolate, obtuse, 

 finally reflexed; petals oval, obtuse, with a yellow blotch 

 below the middle, slightly longer than the sepals. 

 June, July. Cold mountain brooks and wet rocks, Pa. 

 to N. C. and Tenn. B.B. 2:174; (ed. 2) 2:219. Occa- 

 sionally cult. 



42. pennsylvanica, Linn. (Micrdnthes pennsylvanica, 

 Haw.). SWAMP SAXIFRAGE. Tall and stout, up to 3 ft. 

 or more high, viscid pubescent: rhizome thick: Ivs. all 



