ENUMERATION OF THE SPECIES 143 



and the generally broader leaves. Rhododendron alabamense shows some variation 

 chiefly in the size and pubescence of its flowers. The type specimen has large 

 flowers with a glandular-pilose tube, while in Nos. 6258 and 6259 the tube has 

 longer and quite glandless hairs; the specimens from Albertville have generally 

 smaller flowers, the tube sometimes scarcely 2 cm. long and the lobes longer and 

 narrower, sometimes nearly oblong and acuminate, the leaves are also smaller and 

 less glaucescent and often less pubescent beneath. The Abbeville specimen from 

 southeastern Alabama is again much like the type in its flowers, but the leaves are 

 less densely pubescent and less glaucescent beneath. In the National Herbarium 

 is a sheet (No. 770,587) labeled "R. viscosum Torr., borders of stream in thickets, 

 Pointclear (not quite legible), C. Mohr, June 16, 1889," which contains a specimen of 

 R. arborescens and two specimens which suggest a glabrous form of R. alabamense, 

 but as apparently the locality and the date do not belong to these two specimens, I 

 consider them for the present as doubtful. 



Rhododendron alabamense was apparently first observed in 1883 by Dr. C. Mohr, 

 who recognized it as distinct from the more widely distributed R. canescens which 

 he included under his A. nudiflora; this probably induced him to identify this 

 particular form with A. nudiflora var. alba Aiton. The Bpecies has not yet been 

 introduced into cultivation; it may be hardy North, and for southern gardens it 

 would be superior to R. canescens on account of its very fragrant larger flowers, 

 which are "snowy white" according to Dr. Mohr. 



Rhododendron canescens Sweet, Hort. Brit. ed. 2, 343 (1830). — 



G. Don, Gen. Syst. Ill, 848 (1834), excl. the reference to plant of 



Winchester. — Loudon, Arb. Brit. II, 1143 (1838), in part. — Millais, 



Rhodod. 136 (1917). 



Azalea lutea Linnaeus, Spec. 150 (1753), as to the synonym of Gronovius only. 

 Azalea nudiflora Linnaeus, Spec. ed. 2, 214 (1762), as to the synonym of 



Gronovius only. — Walter, Fl. Car. 97 (1788). — Elliott, Sketch Bot. I. 240 



(1821), in part. — Mohr, PI. Life Ala. 653 (1901). 

 ? Azalea nudiflora t. bicolor Aiton, Hort. Kew. I. 203 (1789). 

 Azalea canescens Michaux, Fl. Bar. -Am. I. 150 (1803). — Pursh, Fl. Am. Sept. 



152 (1814), in part. — Elliott, Sketch Bot. I. 239 (1821). — De Candolle, 



Prodr. VIII. 717 (1838). — Small, Fl. S. E. V. S. 883 (1903); Shrubs Fla. 



93 (1913); in N. Am. Fl. XXIX. 42 (1914). 

 Azalea bicolor Pursh, Fl. Am. Sept. I. 153 (1814). — Elliott, Sketch Bot. I. 



239 (1821). — De Candolle, Prod. VII. 717 (1839). 

 Rhododendron bicolor Sweet, Hort. Brit. ed. 2, 344 (1830). — G. Don, Gen. 



Syst. III. 847 (1834). — Loudon, Arb. Brit. II. 1142 (1838). 

 Rhododendron nudiflorum Chapman, Fl. S. U. S. 265 (1865), not Torrey. 

 Azalea nudiflora var. canescens Rehder in Bailey, Cycl. Am. Hort. 1. 121 (1900), 



in part. 1 



A shrub to 4 or 5 m. tall with irregularly whorled upright branches; young branch- 

 lets finely villous-pubescent and usually sparingly strigose; winter-buds with 

 broadly ovate, acuminulate and densely grayish pubescent scales. Leaves usually 



1 Prelinnean Synonym: Cistus Virginiana flore et odore Periclymeni, Catesby, 

 Nat. Hist. Car. I. 57, t. 57 (1731), not Banister apud Plukenet. 



Additional Illustrations. Colored Plates: Abbot, Nat. Hist. Lepidopt. 

 Georgia, I. t. 27 (1797). — Audubon, Birds of Am. IV. t. 398 (1835-38). 



