SAXIFRAGE FAMILY. 533 
ALABAMA: Mountain region. Wet sandstone rocks. Walker County (7. M. 
Peters). Flowers white. Rare. Perennial. 
Type locality: ‘‘ Hab. in Carolina septentrionali, loco dicto Flat-rock,” 
Herb. Geol. Surv. Herb. Mohr. 
TILLABA L.Sp. Pl.1:128. 1753. TrLiara. 
Cosmopolitan genus of about 20 species. North America, 4. 
a6 
Tillaea aquatica L.Sp. P1.1:128. 1753. PIGMY-WEED. 
Tillaea simplex Nutt. Journ, Acad. Phila. L:114. 1817. 
Gray, Man.ed.6, 177. Chap. Fl. Suppl. 622; ed. 3, 150. 
KUROPE, 
Alleghenian to Louisianian area. Southeastern Massachusetts to Maryland and 
southeastern Pennsylvania. 
ALABAMA: Coast plain. Low wet pine barrens, border of ponds, Mobile. March; 
rare. Annual. 
Type locality: “Hab. in Europae inundatis.” 
Herb, Geol. Surv. Herb. Mohr. 
PENTHORUM L. Sp. P1.1:482. 1753. 
Two species. China, North America. 
Penthorum sedoides L. Sp. P1.1:482. 1753. DITCH STONECROP. 
Ell. Sk.1:528. Gray, Man. ed.6,176. Chap. F1. 151. 
CHINA, JAPAN. 
Alleghenian to Louisianian area. New Brunswick, Quebec, Ontario; New England 
west to Minnesota, Nebraska, and Kansas, south to Texas and Florida. 
ALABAMA: Tennessee Valley to Coast Pine belt, Wet woods. Tuscaloosa County, 
Clarke County, Choctaw Corner; most southern station. Common, Perennial. 
Type locality: ‘“ Hab.in Virginia.” 
Herb. Geol. Surv. Herb. Mohr. 
SAXIFRAGACEAE. Saxifrage Family. 
THEROFON Raf. New FI. N. A. 4:66. 1836. 
(BoYKINIA Nutt. Journ. Acad. Phila. 7:113. 1834. Not Raf.) 
Therofon aconitifolium (Nutt.) Millsp. Bull. W. Va. Agr. Exp. Sta, 2:361. 1892. 
Boykinia aconitifolia Nutt. Journ, Acad. Phila. 7:1138. 1834, 
Gray, Man. ed. 6,170. Chap. FI. 153, 
Carolinian area. Mountains of southern Virginia along the mountains to Georgia. 
ALABAMA: Mountain region. Damp rocky banks of streams. Dekalb County, 
banks of Little River, 1,800 feet. Walker County, wet rocks on Clear Creek Falls. 
Flowers white; June, July. Rare. Perennial. 
Type locality: “In the valleys of the Alleghany Mountains, probably in Virginia 
or North Carolina. * * * In Mublenberg’s herbarium,” 
Herb. Geo]. Sury. Herb. Mohr. 
SAXIFRAGA L. Sp. Pl. 1:39%. 1753. 
Two hundred species, chiefly perennials, mostly mountainous, alpine, North and 
South Hemisphere, Europe, South America, North America, 45, 
Saxifraga virginiensis Michx. Fl]. Bor. Am. 1: 269. 1803. 
Ell. Sk.1:511. Gray, Man. ed. 6,170. Chap. FI. 153. 
Canadian zone to Carolinian area. New Brunswick west to the Pacific. New 
England (Mount Desert Island, Maine) west to Michigan, West Virginia, Ohio, and 
Kentucky, south along the mountains to Georgia. 
ALABAMA: Tennessee Valley to Lower hills. Shaded rocky banks. Frequent 
throughout the mountains. Winston County, 1,500 feet. Dekalb County, Lookout 
Mountain. Tuscaloosa County, 300 to 400 feet; most southerly station. Flowers 
yellow; March, April. 
Type locality: ‘Hab. in rupibus Pensylvaniae, Virginiae et in montibus Carolinae.” 
Herb. Geol, Surv. Herb. Mohr. 
