SAXIFRAGACE4C. (SAXIFRAGE FAMILY.) 143 



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



2. S. rivulfiris, L. (ALPINE BROOK SAXIFRAGE.) Small ; stems 

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

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

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



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

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

 entire, jleshy, more or less ciliate ; petah yellow, spotted with orange, oblong. Wil- 

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

 and northward. June; (Eu.) 



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

 flowers corymbose ; leaves oblong or spatidate, 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. Aizdoil, Jacq. Leaves persistent, thick, spatidate, with white cartilayi- 

 nous toothed margins ; calyx partly adherent ; petals obovate, 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. Virginiensis, 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 oblony 

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

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



7. S. Pennsylvanica, 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) small petals; filaments 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 reftexed, entirely free, nearly as long as the oval obtuse (white) petals ; Jilaments 

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

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

 ward. June. 



S. LEUCANTHEMIF6LIA, Michx., S. CAREYANA, Gray, and S. CAROLINI- 

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



3. BO YK INI A, 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 palmately 5 7-lobed or cut petioled leaves, and white 

 iknvei-s in cymes. (Dedicated to the late Dr. Boy/cm of Georgia ; 



