168 SAXIFRAGACEJE. (SAXIFRAGE FAjnLY.) 



flowered ; lower leaves rounded, 3 - 5-lobed, on slender petioles, the upper lance- 

 olate; petals white, owate.— Alpine region of Mount Washington, New Hamp- 

 shire (Oakes, &c.) : rare. (Eu.) 



3. S. aizoides, L. (Yellow Mountain-S.) Low (3' - 5' high), in 

 tufts, with few or several corymbose flowers ; leaves linear-lanceolate, entire, fleshy, 

 distantly spinulose-ciliate ; petals yellow, spotted loith orange, oblong. — Willoughby 

 Mountain, Vermont ; near Oneida Lake, New York ; N. Michigan ; and north- 

 ward. June. (Eu.) 



4. S. trieuspidata, Retz. Stems tufted (4' -8' high), naked above; 

 flowers corymbose ; leaves oblong or spatulaie, with 3 rigid sharp teeth at the sum- 

 mit ; petals obovate-oblong, yellow. — Shore of L. Superior and northwai-d. (Eu. ) 



« » Leaves clustered at the root ; scape many-floivered, erect, clammy-pubescent. 



5. S. Aiz6on, Jacq. Leaves persistent, thick, spatutate, with white cartilagi- 

 nous toothed margins ; calyx partly adherent ; petals obovate, cream-color, often 

 spotted at the base. — Moist rocks. Upper Michigan and Wisconsin ; Willoughby 

 Mountain, Vermont (AT/-. Blake), and northward. — Scape 5' - 10' high. (Eu.) 



6. S. Virgini^nsiS, Michx. (Early S.) Low (4' -9' high); leaves 

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

 flowers in a clustered cyme, which is at length open and loosely paniclcd ; lobes- 

 of the nearly free calyx erect, not half the length of the oblong obtuse (ivhite) petals; 

 pods 2, viuited merely at the base, divergent, purplish. — Exposed rocks : com- 

 mon, especially northward. April -June. 



7. S. Pennsylvtoiea, L. (Swamp S.) Large (l°-2° high); leaves 

 oblanceolate, obscurely toothed (4' - 8' long), narrowed at the base into a short and 

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

 nearly free calyx recurved, about the length of the linear-lanceolate {greenish) small 

 petals ; filaments awl-shaped: pods at length divergent. — Bogs: common, es- 

 pecially northward. May, June. — A homely species. 



8. S. er6sa, Pursh. (Lettuce S.) Leaves oblong or oblanceolate, obtuse, 

 sharply toothed, tapering into a margined petiole (8' -12' long) ; scape slender 

 (l°-3° high) ; panicle elongated, loosely flowered; pedicels slender; calyx re- 

 flexed, entirely free, nearly as long as the oval obtuse (white) petals; filaments club- 

 shaped; pods 2, nearly separate, diverging. — Cold mountain brooks, Penn- 

 sylvania (near Bethlehem, Mr. Wolle), and throughout the AUeghanies, south- 

 ward. June. 



-1--1- Petals unequal, with claws, white, all or some of tliem with a pair of yellow 

 spots near the base : leaves oblong, wedge-shaped or spatulate ; calyx free and 

 reflexed. 



9. S. Ieucailtheinif61ia, Lapeyrouse, Michx. Leaves coarsely toothed 

 or cut, tapering into a petiole ; scapes (5' - 18' high) bearing one or more leaves 

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

 lanceolate ; the 3 larger ones with a heart-shaped base and a pair of spots ; the 2 

 smaller with a tapering base and no spots. — Salt Pond Mountain, Virginia 

 ( ]Vm. M. Canby), and southward in the AUeghanies. 



10. S. Stell^ris, L., var. eom6sa, Willd. Leaves wedge-shaped, more 

 or less toothed ; scape (4' -5' high) bearing a small contracted panicle; many 



