ENUMERATION OF THE SPECIES 167 



Curtis, Descript. Trees & Shrubs (in Geol. Nat. Hist. Surv. N. Car. III. Bot.) 

 (I860). Britton & Brown, III. Fl. II. 559, fig. 2746 (1897). Britton, 

 Man. 698 (1901). Gattinger, Fl. Term. 131 (1901). Porter, Fl. Penn- 

 sylv. 238 (1903). Keller & Brown, Handb. Fl. Phila. 246 (1905). Small, 

 Fl. S. E. U. S. 883 (1903); in N. Am. Fl. XXIX. 43 (1914). Millspaugh, 

 Uv. Fl. W. Virginia, 322 (in W. Va. Geol. Surv.) (1913). 



Azalea vertidllata Carr, Cat. Trees & Shrubs Bartram's Bot. Gard. 11 (1814), 

 name only. Loddiges, Bot. Cab. XVII. t. 1632 (1830). 



Azalea arborea Bartram ex Pursh, Fl. Am. Sept. 152 (1814), as synonym. 



Azalea fragrans Rafinesque, Ann. Nat. 12 (1820), not Adams. 1 



Upright shrub to 3 m., rarely a small tree 6 m. tall; young branchlets glabrous 

 or rarely with a few scattered strigose hairs, often slightly bloomy, yellowish brown 

 or reddish brown at the end of the first season, becoming light gray or light gray- 

 ish brown the second year; floral winter-buds glabrous, light brown, with broadly 

 ovate rounded and usually mucronulate ciliate scales. Leaves obovate or some- 

 times elliptic to oblong-oblanceolate, acute or obtuse and gland-tipped at the apex, 

 cuneate at base, 3 to 8 cm. long and 1.3 to 3 cm. broad, ciliate, lustrous bright 

 green above, glaucous or glaucescent or sometimes nearly green beneath, glabrous 

 except sparingly short-villose on the midrib above and sparingly strigose on the 

 midrib beneath or sometimes quite glabrous beneath; petioles slender, 3 to 7 mm. 

 long, glabrous or rarely with a few strigose hairs. Flowers very fragrant, appear- 

 ing the end of June or beginning of July in 3- to 6-flowered, umbel-like clusters; 

 pedicels slender, 0.8 to 2 cm. long, glandular-hirsute or without glands, sometimes 

 glabrous; sepals ovate to linear-oblong, usually obtuse, 3 to 6 mm. long, glandu- 

 lar-ciliate, otherwise glabrous or sometimes villose; corolla funnel-form, white or 

 pinkish, the tube 2.5 to 3 cm. long, slightly dilated at the apex, usually sparingly, 

 rarely densely glandular-hirsute outside, otherwise glabrous or slightly, rarely 

 rather densely villose, pubescent inside except on the lower third, lobes ovate- 

 oblong, acuminate 1.5 to 2 cm. long; stamens exserted about twice as long as the 

 tube, the filaments purple above, pubescent below the middle; anthers 2 to 3 mm. 

 long, ochraceous; style as long or somewhat longer than the stamens, 5.5 to 7 cm. 

 long, purple above, glabrous or sometimes finely pubescent near the base, rarely 

 villose on the lower third; ovary glandular-setose, with reddish glands. Capsule 

 oblong-ovoid, 0.8 to 1.7 cm. long, densely glandular-hispid. 



This species is distinctly a species of the Appalachian Mountain regions and 

 does not occur in the coastal plane but along the Susquehanna it descends to the 

 southern part of Lancaster County, Pennsylvania, along the Potomac to Fairfax 

 County, Virginia, along the Savannah River to Richmond County, Georgia, 

 and along the Chattahoochee River to Decatur County, Georgia; it is distributed 

 from southern Pennsylvania through western Maryland, northern and western 

 Virginia, eastern West Virginia, and eastern Kentucky, western North Carolina, 

 northwestern South Carolina, eastern Tennessee to northern (Winston County) 

 and eastern Alabama (Talladega and Clay Counties) 2 and to eastern (Richmond 

 County) and southwestern Georgia (Decatur County). It grows chiefly on the 

 banks of mountain streams, rarely on the borders of swamps and ascends to an 

 altitude of 5200 feet on the mountains of North Carolina. 



1 ADDITIONAL ILLUSTRATIONS. COLORED PLATE: Lounsberry, Guide to Trees, t. 

 75 (1900). BLACK FIGURES: Keeler, Our North. Shrubs, 353, fig. (1903). Garden 

 Mag. V. 219, fig. (1907). Country Life Am. XL 496 (1907). Bailey, Stand. 

 Cyd. Hort. V. f. 3388 (1916), after Gard. & For. 



a Sheet No. 770,587 in the National Herbarium labeled "Rhododendron visco- 

 sum, borders of stream in thickets, Pointclear, C. Mohr, June 16, 1889," contains 



