HAXIFRAGACE<E. (SAXIFRAGE FAMILY.) 143 



* * Sh-. ')>s ascending, leafy : stem-leaves alternate : calyx coherent below ivith the pod. 



2. S. rivMliai'is, L. (ALPINE BROOK SAXIFRAGE.) Small; stems 

 weak, 8 - 5-flowered ; lower leaves rounded, 3 - 5-lobed, on slender petioles, the 

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

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



3. S. aizoklcs, L. (YELLOW MOUNTAIN SAXIFRAGE.) Low (3' -5' 

 high), in tufts, with few or sevei'al corymbose flowers; leaves linear-lanceolate, 

 sal iff-, fli-sluj, spinulose-ciliate ; petals yellow, spotted with orange, ob'ong. Wil- 

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

 and northward. June. (Eu.) 



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

 flowers corymbose ; leaves oblong or spatidate, with 3 riyid pointed teeth at the sum- 

 mit ; petals obocate-oblong, yellow. Shore of L. Superior and northward. (Eu.) 



^ * Leaves clustered at the root : scape many -flowered, erect, clammy-pubescent. 



5. S. Aizdon, Jacq. Leaves persistent, thick, spatalate, with white cartilagi- 

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

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

 loughby Mountain (Mr. Blake], and northward. Scape 5' - 10' high. (Eu.) 



6. S. Virgiifiieiisis, Michx. (EARLY SAXIFRAGE.) Low (4' -9 

 high) ; leares obovate or oval-spatulate, narrowed into a broad petiole, erenatc- 

 toothed, thickish ; flowers in a clustered cyme, which is at length open and loose- 

 ly panic-led ; lobes of the nearly free calyx erect, not half the length of the oblony 

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

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



7. S. Peunsylviailica, L. (SWAMP SAXIFRAGE.) Large (l-2 

 high); leaves oblanceolatc, 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 (greenish) 8fi*ztt petals ; Jilaments aid-shaped: pods at length divergent. 

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



8. S. erossi, Prrsh. (LETTUCE SAXIFRAGE.) Leaves oblong or oblanceo- 

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

 Blender (l-3 high); pank-le elongated, loosely flowered, pedicels slender; 

 calyx reflexedf entirely free, nearly as long as the oval ol>tuse (white) petals; jilanients 

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

 tiylvania (near Bethlehem, Mr. Wolle), and throughout the Alleghanies south- 

 ward. June. See Addend. 



S. LEUCANTHEMI FOLIA, Michx., S. CAREYANA, Gray, and S. CAROLINI- 

 A.NA, Gray, of the mountains of CaroUna, may occur in those of Virginia. 



3. BOYKINIA, Nutt. BOYKINIA. 



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

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

 nial herbs, with alternate palmatcly 5-7-lobed or cut pctiolcd leaves, and white 

 flowers in cymes. (Dedicated to the late Dr. Boyicin of Georgia.) 



