176 SAXIFRAGACEAE. [Vol.. II. 



16. Saxifraga Michauxii Britton. Michaux's Saxifrage. (Fig. 1838.) 



Saxifraga leucanthemifolia Michx. Fl. Bor. 

 Am. 1:268. 1803. Not LePeyr. 1795-1801. 



Hexaphoma petiolaris Raf. Fl. Tell. 2: 67. 

 1836. Not 5. petiolaris R. Br. 1819. 



Saxifraga Michauxii Britton, Mem Torr. 

 Club, 4: 1 1 8. 1894. 



Erect, viscid-pubescent, 6 / -2o / high. 

 Basal leaves clustered, oblanceolate or ob- 

 long, acute or obtuse at the apex, 3'-7' 

 long, narrowed into a margined petiole, 

 coarsely and deeply dentate; flowering 

 stem naked below, leafy-bracted above; 

 inflorescence widely paniculate; flowers 

 2 //_y/ Droa< j ( irregular; petals clawed, 

 white, the 3 larger ones sagittate or trun- 

 cate and usually with a pair of yellowish 

 spots at the base, the other 2 spatulate and 

 unspotted, narrowed at the base; calyx- 

 tube free from the ovary, its lobes re- 

 flexed; follicles lanceolate, sharp-pointed, 

 little divaricate, about 2^" long. 



In dry rocky places, mountain summits of , 



Virginia to Georjfia. May-Sept. V 



17. Saxifraga Geum L,. Kid- 

 ney-leaved Saxifrage. 

 (Fig. 1839.) 



Saxifraga Geum L. Sp. PI. 401. 1753. 



Densely glandular-pubescent, sea- 

 pose, scape erect, 3'-io' high. Leaves 

 all clustered at the base, cordate, kid- 

 ney-shaped or orbicular, %'-i' wide, 

 coarsely crenate all around, borne on 

 stout densely pubescent petioles i'- 

 2.J4' long; inflorescence terminal, pan. 

 iculate; bracts small, linear, obtuse; 

 branches of the panicle ascending, 2- 

 6-flowered; flowers 2 // ~3 // broad; petals 

 white, oblong or ovate-oblong, with a 

 yellow spot at the base and several 

 smaller purplish spots at the middle; 

 calyx-lobes lanceolate or ovate-lanceo- 

 late, reflexed; capsule oblong, its 

 beaks slightly divergent. 



Newfoundland and in the mountain- 

 ous parts of Europe. June-July. 



3. THEROFON Raf. New Fl. N. A. 4: 66. 1836. 

 [BOYKINIA Nutt. Journ. Acad. Phila. 7: 113. 1834. Not Raf.] 



Glandular-pubescent perennial herbs, with alternate petioled orbicular or reniform 

 leaves, and small white perfect flowers in branching panicles. Calyx-tube top-shaped or 

 subglobose, adnate to the ovary, its limb 5-lobed. Petals 5, deciduous, inserted on the 

 calyx-tube. Filaments short. Ovary 2-celled (rarely 3-celled); styles 2, rarely 3. Capsule 

 2-celled, the beaks of the carpels divergent. Seeds numerous, the testa shining, minutely 

 punctate. [Greek, beast-killing; an old name of aconite.] 



About 5 species, natives of the southern Allejjhanies and the mountains of western North 

 America. 



