SAXIFRAGACE<E. (SAXIFRAGE FAMILi.) 143 



* if StcT.s ascending, leafy : stem-leaves alternate: calyx coherent below with the pod. 

 '2. S. I'ivuliil'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, 

 New Hampshire, Oakes. Very rare. (Eu.) 



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

 high), in tufts, with few or several corymhose flowers; leaves linear-lanceolate* 

 satire, fiesliy, spinulose-ciliate ; petals yellow, spotted with orange, oblong. Wil- 

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

 and northward. June. (Eu.) 



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

 flowers corymbose ; leaves oblong or spatulate, with 3 rigid pointed teeth at the sum- 

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



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



5. S. AlZOOIl, 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 (A/r. Blake], and northward. Scape 5' 10' high. (Eu.) 



6. S. Virgiiiicnsis, Michx. (EARLY SAXIFRAGE.) 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 ohlony 

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

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



7. S. Peiinsylvanica, L. (SWAMP SAXIFRAGE.) 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 clus- 

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

 late (greenish) s>fdl petals; filaments aid-shaped: pods at length divergent. 

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



8. S. erosa, Pin-sh. (LETTUCE SAXIFRAGE.) Leaves oblong or oblanceo- 

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

 slender (l-3 high); pani'-le elongated, loosely flowered, pedicels slender; 

 calyx reflexed, entirely free, nearly as long as the oval d>tuse (white) petals; filaments 

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

 (jylvania (near Bethlehem, Mr. \Volle), and throughout the Alleghanies south- 

 ward. June. See Addend. 



S. LEUCANTHEMIFOLIA, Michx., S. CAREY\NA, Gray, and S. CAROLIM- 

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



3. BOYKINIA, Nutt. BOYKINIA. 



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

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

 nial herbs, with alternate palmately 5-7-lobed or cut petiolcd leaves, and wbivc 

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



