70 
1. Therofon aconitifolium (Nutt.) Millsp. Bull. West Va. Agric. 
Exp. Sta. 2: 361. 1892. 
Virginia to Tennessee and Georgia. 
2. Therofon elatum (Nutt.) Greene, Man. 121. 1894. 
Saxifraga elata Nutt.; T. & G. Fl. N. A. 1: 575. 1840. 
Boykinia occidentalis T. & G. Fl. N. A. 1: 577. 1840. 
Boykinia elata Greene, Fl. Francis. 190. 1891. 
Boykinia Nuttallit J. M. Macoun, Can. Rec. Sci. 1895. 
British Columbia to southern California. 
The plant for which Mr. J. M. Macoun suggests the name 
Boykinia Nutallu does not seem to us sufficiently distinct from 2. 
occidentalis T. & G. We have the form to which Mr. Macoun 
evidently refers even from Santa Cruz, California, but hardly” 
hirsute. We must consider, that Mr. Nuttall was describing a 
Saxifraga when he wrote ‘‘a very remarkable robust species.” 
3. Therofon rotundifolium (Parry). 
Boykinia rotundifolia Parry; A. Gray, Proc. Am. Acad. 
371. 1878: 
Southern California. 
4. Therofon Richardsoni (Hook.). 
Saxifraga Richardsonit Hook. Fl. Bor. Am. 1: 247, 1833. 
Saxifraga Nelsoniana Hook. & Arn. Bot. Beechey,*124. pl. 29- 
1832. Not D.Don. 1822. 
Hemieva Richardsoni Raf. F). Tell. 2: 70. 1836. 
Boykinia Richardsoni A. Gray, Bot. Cal. 1: 196. 1876. 
Arctic America. - 
5. Therofon majus (A. Gray). 
Boykinia occidentalis var. elata A. Gray, Proc. Am. Acad. 8: 
383,name only. 1872. Not Sazifraga elata Nutt. 1840. 
Boykinia major A, Gray, Bot. Cal. 1: 196. 1876. 
California to Oregon. 
6. Therofon Jamesii (Torr.). 
Saxifraga Jamesit Torr. Ann. Lyc. N. Y. 2: 204. 1826. 
Telesonix Jamesti Raf. Fl. Tell. 2: 69. 1836. 
Rocky Mountains, Montana, Dakota. 
