446 SAXIFKAGACEAE (SAXIFRAGE FAMILY) 



1. S. stellaris L., var. combsa 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, with a claw. (S. comosa Britton.) Arctic Am., locally s. to Mt. 

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



2. 8. leucanthemifdlia Michx. Leaves spatulate-oblong, 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 and r pair of 

 yellow spots, the 2 smaller with a tapering base and no spots. (S. Micbauxii 

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



3. S. caroliniana Gray. Viscid with glandular hairs ; leaves oval 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. micranthidifMia (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 reflexed, 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. Forbdsii 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. pennsylvanica. 



6. S. pennsylvanica L. (SWAMPS.) 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. Eobinson, Miss Dearborn}. 



7. S. virgini6nsis Michx. (EARLY S.) Low (1-3 dm. high); leaves obovate 

 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. CHLORANTHA Oakes is an anomalous plant of Essex Co., Mass., 

 with tiny green pubescent petals or these modified to stamens. 



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

 lower leaves rounded, 3-5-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. 5-3 dm. long, with few or several corymbose flowers ; leaves numer- 

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

 (S. autumnalis 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.) 



