SAXIFEAGACE^. (SAXIFKAQE FAMILY.) - 143 



* * Stems ascending, leafy : stem-leaves alternate : calyx coherent hdow with the pod 



2. S, rivul&ris, L. {Alpine Bbooe Saxifrage.) Small ; stems 

 weak, 3 - 5-flovvered ; lower leaves rounded, 3 - 5-lobed, on slender petioles, the 

 upper lanceolate; petals white, ovate. — Alpine region of Mount Washington, 

 New Hampshire, Oa/ces. Very rare. (Eu.) 



3. S. aizoides, L. (Yellow Mountaik SAXimAGE.) Low (3' -5 

 high), in tufts, with few or several corymbose flowers ; leaves iitiear-lanceolaie, 

 entire, fleshy, more or less ciliate ; petals yellow, spotted with orange, oblong. — Wil- 

 loughby Mountain, Vermont ; near Oneida Lake, New York ; N. Michigan ; 

 and northward. Jime. (Eu.) 



4. S. tricuspid fata, Betz. Stems tufted (4' -8' high), naked above; 

 flowers corymbose ; leaves Along or spatalate, with 3 rigid pointed teeth at the sum- 

 mit; petals obovate-oblong, yeUmo. — Shore of L. Superior and northward. (Eu.) 



* * Leaves clustered at the root : scape many-flowered, erect, dammy-puhescent. 



5. S» Aizooilf Jacq. Leaves persistent, thick, spatulate, with white cartilagi- 

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

 spotted at the base. — Moist rocks, Upper Michigan and Wisconsin; Wil- 

 loughby Mountain {Mi: Blake), and northward. — Scape 5' - 10' high. (Eu.) 



6. S. Tirginiensis, Michx. (Eaklt Saxifeage.) 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 loose- 

 ly panicled ; lobes of the nearly free calyx erect, not half the length of the oblong 

 obtuse {white) petals ; pods 2, united merely at the base, divergent, purplish. — 

 Exposed rocks ; common, especially northward. April - June. 



7. S. Pennsylvdnica, L. (Swamp Saxifrage.) Large (l°-2° 

 liigh) ; /eaues oblanceolate, obscurely toothed (4' -8' long), narrowed at the base 

 into a short and broad petiole ; cymes in a large oblong panicle, at first clus- 

 tered ; lobes of the nearly free calyx recurved, about the length of the linear-lanceo- 

 late l^reenish) small petals; JUaments awl-shaped: pods at length divergent. — 

 Bogs, common, especially northward. May, June. — A homely species. 



8. S. erdsa, Pursh. (Lettuce Saxifrage.) Leaves oblong or oblanceo- 

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

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

 calyx reflexed, entirely free, nearly as long as the aval obtuse (white) petals ; fllaments 

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

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

 ward. June. 



S. LEUCAifTHEMiF6LiA, Mlchx., S. CaretAna, Gray, and S. Carolini- 

 Xna, Gray, of the mountains of Carolina, may occur in those of Virginia. 



3. BOYKINIA, Nutt. Boykinia. 



Calyx-tube top-shaped, coherent with the 2-celled and 2-beaked pod. Sta. 

 mens 5. as many as the deciduous petals. Otherwise as in Saxifraga. — Peren- 

 nial herbs with alternate palmatoly 5-7-lobed or cut petioled leaves, and white 

 flowers in cymes. (Dedicated to the late Dr. Boy/an of Georgia ) 



