SAXIFRAGACEJS. (SAXIFRAGE FAMILY.) 153 



3. BOYKINIA, Nutt. 



Calyx turbinatc, coherent with the ovary, 5-cleft. Petals deciduous. Sta- 

 mens 5, short. Styles 2-3. Capsule 2-3-celled, with a central many-seeded 

 placenta, 2-bcaked, opening between the beaks. Seeds smooth. Erect leafy 

 perennial herbs, with alternate round-cordate palmately lobed and toothed leaves, 

 and small flowers in corymbose cymes. 



1. B. aconitifolia, Nutt. Glandular-hairy, or the upper surface of the 

 long-petioled 5 - 7-lobed leaves smoothish ; cymes fastigiate, clammy ; flowers 

 secund, white ; teeth of the calyx triangular-ovate. Mountains of Georgia, 

 North Carolina, and Tennessee. June and July. Stem l-2 high. 



4. SAXIPRAGA, L. SAXIFRAGE. 



Calyx free, or cohering with the base of the ovary, deeply 5-cleft. Petals 5, 

 commonly deciduous. Stamens 10. Styles 2. Capsule 2-cellcd, 2-beaked, 

 opening between the beaks. Seeds numerous, smooth. Lowest leaves clus- 

 tered. 



* Stems leafy. 



1. S. leucanthemifolia, Michx. Hairy and clammy ; leaves spatulate, 

 coarsely toothed, tapering into a long winged petiole ; the upper ones linear ; 

 panicle diffuse ; petals clawed, unequal, white, the 3 larger ones spotted with 

 yellow. Mountains of North Carolina. July. Stem 10' -20' high. 



* * Stems naked, scape-like. 



2. S. erosa, Pursh. Leaves oblong, tapering to the base, sharply toothed ; 

 scape clammy-pubescent ; panicle long, slender, loosely flowered ; sepals reflcxed, 

 nearly as long as the oval white petals ; stigmas sessile. Shady banks of 

 streams on the mountains of North Carolina, and northward. July. Scape 

 1 - 3 high. Leaves 8'- 12' long. 



3. S. Virginiensis, Michx. Pubescent ; leaves somewhat fleshy, obo- 

 vate, crenately toothed ; scape clammy ; panicle cymose, dense-flowered ; sepals 

 erect, not half as long as the oblong obtuse white petals ; styles short. Rocks 

 on the mountains of Georgia, and northward. April end May. Scape 4' - 12' 

 high. 



4. S. Careyana, Gray. Smooth or pubescent ; leaves broadly ovate, cre- 

 nately or sharply toothed, abruptly contracted into a slender petiole ; scape slen- 

 der ; panicle loosely flowered ; sepals spreading, half as long as the lanceolate- 

 oblong, white, faintly spotted petals ; filaments filiform. Moist shady rocks, on 

 the high mountains of North Carolina. June. Plant 6' high. 



5. S. Caroliniana, Gray. Glandular-pubescent ; leaves all radical, del- 

 toid or ovate, coarsely toothed, abruptly contracted into a margined petiole ; 

 bracts of the scape few ; panicle diffuse ; petals ovate, white, with 2 pale spots 

 below the middle, twice the length of the reflexed sepals ; filaments club-shaped ; 

 carpels turgid, free from the calyx, at length widely spreading. Damp shady 

 places on the mountains of North Carolina. May and June. Scape 6' - 12' 

 high. 



