446 SAXIFRAGACEAE (SAXIFRAGE FAMILY) 



1. S. stellaris L., var. comosa Willd. Leaves small, spatulate, wedge- 

 shaped, more or less toothed ; scape (7-16 cm. high) bearing a contracted 

 panicle ; most of the flowers changed into tufts of green leaves ; petals unequal, 

 lanceolate, loith a claw. (S. comosa Britton.) Arctic Am., locally s. to Mt. 

 Katahdin. Me., and mts. of Col. July. (Eurasia.) 



2. S. leucanthemifblia Michx. Leaves spatulate-oblcng. coarsely toothed or 

 cut, tapering into a petiole ; stems (2-5 dm. high) bearing one or more leaves 

 or leafy bracts and a loose spreading corymbose or paniculate cyme ; petals 

 white, lanceolate, the 3 larger ones with a heart-shaped base ani r pair of 

 yellow spots, the 2 smaller with a tapering base and no spots. (& Mickauxii 

 Britton.) \Vet cliffs, mts. of Va. to N. C. and Ga. 



3. S. caroliniana Gray. Viscid with glandular hairs ; leaves ova! or ellipses*! 

 (2-6 cm. broad), coarsely toothed, rather abruptly or somewhat cuneately con- 

 tracted to long hairy petioles; stem 3-4 dm. high ; panicle ample ; petals ovate, 

 obtuse, white with two purple spots ; filaments clavate ; follicles united only 

 at the base, widely spreading (S. Grayana Britton.) Wet limestone rocks, 

 mts. of s. w. Va. 



4. S. micranthidifblia (Haw.) Britton. (LETTUCE S.) Leaves oblong or 

 oblanceolate, obtuse, sharply toothed, 6-14 cm. in length, tapering into a mar- 

 gined petiole nearly as long ; scape slender, 3-9 dm. high ; panicle elongated, 

 loosely flowered ; pedicels slender ; calyx rffiexed, entirely free, nearly as long 

 as the oval obtuse {white) petals ; filaments club-shaped ; follicles nearly separate, 

 diverging, narrow, pointed, 4-6 mm. long. (S. erosa Pursh.) Cold mt. brooks 

 and wet rocks, Pa. to N. C. and Tenn. 



5. S. ForbSsii Vasey. Stem stout, 6-12 dm. high ; leaves denticulate, oval 

 to elongated-oblong (1-2 dm. long) ; sepals oblong ; petals pure white, consid 

 erably exceeding the calyx-lobes; filaments filiform ; follicles short, ovate. 

 Shaded cliffs, near Makanda, s. 111. (Forbes); and (?) e. Mo. (Lettermann) , 

 where showing some transition to 8. pennsyh-amca. 



6. S. pennsylvanica L. (SWAMP S.) Large (3-6 dm. high); leaves oblanceo- 

 late, thickish, obscurely toothed (1-2 dm. long), narrowed at base into a short 

 and broad petiole ; cymes in a large oblong panicle, at first clustered ; lobes of 

 the nearly free calyx deltoid, about the length of the linear-lanceolate (green- 

 ish) small petals; filaments awl-shaped; follicles at length divergent. Low 

 meadows. N. E. to Va., w. to Minn, and Mo. A form with crimson petals occurs 

 in Vt. and N..H. (Miss E. fiobinson, Miss Dearborn). 



7. S. virginiSnsis Michx. (EARLY S.) Low (1-3 dm. high) ; leaves obotate 

 or oval-spatulate, narrowed into a broad petiole, crenate-toothed, thickish ; 

 flowers in clustered at length open and loosely panicled cymes ; follicles united 

 merely at the base, divergent, purplish. Exposed rocks and dry hillsides ; N. B. 

 and Que. to Ga., and w. to Minn., Mo., and Tenn.; common, especially northw. 

 Apr.-June. Var. CHLORAXTHA Oakes is an anomalous plant of Essex Co., Mass., 

 with tiny green pubescent petals or these modified to stamens. 



8. S. rivularis L. (ALPINE BROOK S.) Small ; stems weak, 3-5-flowered ; 

 lower leaves rounded, -o-lobed, slender-petioled, upper lanceolate ; petals white, 

 ovate. Arctic Am., locally s. to Mt. Washington, N. H.; and in the Rocky 

 Mts. to Mont. June, July. (Eu.) 



9. S. tricuspidata Rottb. Stems tufted (4-16 cm. high), naked above ; 

 flowers corymbose; leaves oblong or spatulate, with 3 rigid sharp teeth at the 

 summit ; petals obovate-oblong, yellow. Rocks, Arctic Am., s. to L. Superior, 

 L. Winnipeg, and mts. of B. C. June-Aug. (Eu. ) 



10. S. aizoides L. (YELLOW MOUNTAIN S.) Low, matted or ascending; 

 branches 0. 6-3 dm. long, with few or several corymbose flowers ; leaves numer- 

 ous, fleshy, distantly spinulose-ciliate : petals yellow, spotted with orange, oblong. 

 (S. auttimnalis L.) Wet calcareous rocks, Arctic Am., s. to Gulf of St. Law- 

 rence, mts. of n. Vt., w. N. Y., n. Mich., Alb., and B. C. June-Aug. (Eu.) 



11. S. Aizbon Jacq. Scape 1-5 dm. high ; leaves persistent, thick, spatulate, 

 with white cartilaginous toothed margins; calyx partly adherent ; petals obo- 

 vate, cream-color, often spotted. Calcareous rocks, Greenl. and Lab. to Sask., 

 locally s. to N. S., N. B., mts. of n. Vt. and L. Superior. June, July. (Eurasia.) 



