446 SAXIFRAGACEAE (SAXIFRAGE FAMILY) 



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

 shaped, more or less toothed ; scape (7-1(5 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 with 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 elliptical 

 (2-0 cm. broad), coarsely toothed, rather abruptly or somewhat cuneately con- 

 tracted to Jong 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 (Flaw.) 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} petah ; filaments club-shaped ; follicles nearly separate, 

 diverging, narrow, pointed, 4-0 mm. long. (S. erosa Fursh.) 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 S. pennsylvanica. 



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. Robinson, Miss Dearborn). 



7. S. virginieVsis Michx. (EARLY S.) Low (1-3 dm. high); leaves obonttr 

 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. CHLORANTIIA 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, %-b-lobcd, slender-petioled, upper lanceolate ; petals whiff, 

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

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



!). 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 >.: :; dm. long, with few or several corymbose flowers ; leaves nuiner- 

 ous, fleshy, distantly spinulose-ciliate ; petals >i<l I <nr. */><>/?, <l /////< <>r<i)ui<\ of>J<i</. 

 (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 : lir<-x in-r*i*t>-ut, thick, xjitnl<it< . 

 with i'-hit<' r,n'tilniiimnm toothed inaryinit ; calyx partly adherent ; petals oho- 

 vate, cream-col<>r. often spotted. Calcareous rocks, (ireenl. and Lai), to Sask.. 

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



