144 SAXIFRAGACE.E. (.SAXIFRAGE FAMILY.) 



* Calyx equal-sided. 



\. H. Americana, L. Scape leafless, glandular; leaves creuately or 

 acutely 7 - 9-lobed and toothed, the teeth mucroiiate ; panicles long, narrow, 

 loosely flowered ; calyx as long as the white petals, much shorter than the 

 stamens and very slender styles. Shady rocky places in the middle and 

 upper districts. April -May. Scape 2 -3 high, sometimes with one or 

 two leaves. Leaves 2' - 4' wide, on petioles 4' - 1 2' long. 



2. H. villosa, Michx. Scape bracted or somewhat leafy, and, like the 

 petioles and lower surface of the leaves, shaggy with long spreading rustv 

 hairs ; leaves sharply 5 - 7-lobed and toothed, panicle loose ; flowers minute ; 

 petals white, very narrow, about as long as the stamens ; styles elongated. 



-Mountains, Alabama to North Carolina. June -July. Scape l-3 

 high. Leaves 3' - 8' wide. Flowers about a line in length. 



3. H. Curtisii, Gray. Scape and petioles smooth ; leaves lightly lobed ; 

 branches of the panicle long, racemose, spreading ; petals purple ? spatulate 

 lanceolate, scarcely longer than the calyx; stamens slightly pubescent. 

 Buncombe County, North Carolina (Curtis). Flowers larger than the last. 



4. H. Rugelii, Shuttlw. Glandular-hirsute, and somewhat viscid; scape 

 slender (8'- 15' high), often leafy; panicle small (2'- 5' long), the slender 

 pedicels nodding; petals liuear-spatulate, twice as long as the calyx lobes; 

 filaments exserted; leaves thin, orbicular-cordate (3' -6' broad), shortly and 

 broadly 7 - 9-lobed, with rounded mucronate teeth, pubescent on the nerves 

 beneath ; petioles filiform. Shaded rocks on the mountains of Alabama and 

 North Carolina (Mohr, Rugel). 



* * Calyx oblique. 



5. H. pubescens, Pursh. Glandular-puberulent ; stem (2) leafy; 

 leaves round- cordate, acutely 5 -7-lobed and toothed, with the sinus closed; 

 stipules obtuse, fringed; flowers nodding; calyx ovoid, yellowish green, the 

 ovate lobes obtuse ; petals spatulate, white, and, like the smooth stamens and 

 styles, included. Mountains of North Carolina. June - July. 



6. H. hispida, Pursh. Hirsute or minutely glandular-pubescent; leaves 

 5 _ 9-lobed, the lobes short, rounded, and mucrouately toothed ; panicle con- 

 tracted ; the short branches few-flowered ; petals broadly spatulate, purple, 

 rather shorter than the more or less exserted stamens ; styles at length much 

 exserted. High mountains of North Carolina. May - June. Scape 2 - 3 

 high, sometimes smoothish, as well as the petioles. Flowers larger than any 



of the preceding. 



3. BOYKINIA, Nutt. 



Calyx turbinate, 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-beaked, opening between the beaks. Seeds smooth. Erect leafy 

 perennial herbs, witli 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 a - 7-lobed leaves smoothish ; cymes fastigiatr, clammy ; flowers 

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

 to North Carolina. June - July. Stem 1 - 2 high. 



