146 SAXIFRAGACEAE (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. S. leucanthemifblia 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 vjith a heart-shaped base and a pair of 

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

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



3. S. caroliniana Gray. Viscid with glandular hairs ; leaves oval or elliptica 

 (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 onlj 

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

 mts. of s. w. Ya. 



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. higli ; panicle elongated, 

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

 as the oval obtuse (ivhite) petals ; filaments club-shaped ; follicles nearly separate, 

 diverging, nari'ov:!, pointed, 4-0 mm. long. {S. erosa Pursh.) — Cold mt. brooks 

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



6. S. Forbesii Vasey. Stem stout, 6-12 dm. high ; leaves denticulate, ova) 

 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 S. pennsijlvanica. 



6. S. pennsylvanica L. (Swamp S.) Large (3-6 dm. high); 7«aves o6Zawceo- 

 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. Bobinson, Miss Dearborn). 



7. S. virginiensis Michx. (Early S.) Low (1-3 dm. high); leaves obovata 

 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. 



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

 lower leaves rounded, ?>-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. tricuspidita 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 yelloio, spotted with orange, oblong. 

 (S. autumnaUs 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.) 



