122 THE AZALEAS OF NORTH AMERICA 



relation to Rhododendron was perceived as early as 1791 by Gmelin who referred 

 it to that genus. The species was first described and figured by Duhamel from a 

 cultivated plant which flowered the first time in March, 1756, in the Botanic Gar- 

 den at Paris, where it had been brought from Canada a few years earlier. Into 

 England it was introduced by Joseph Banks in 1767. 



Observations on the pollination of this species have been made by F. Hildebrand 

 (Flora, LXIV. 501, t. 10, fig. 6, 7 (1881) ), who describes the peculiar arrangement 

 to avoid self-fertilization. When the flower opens, the apex of the style with the 

 stigma remains enclosed in a little hood formed by the lobes of the upper lip, 

 while visiting insects carry away pollen from the anthers; further elongation of the 

 style forces it out of the hood and the bent style stretches itself, extending the 

 stigma beyond the stamens, and is then in a position to be fertilized by insects 

 carrying pollen from other flowers. 



Rhododendron canadense f. albiflorum Rehder, comb. nov. 

 Rhododendron Rhodora f. alUflora Rand & Redfield, Fl. Mi. Desert IsL 127 



(August, 1894). 

 Rhododendron canadense f. album Voss, Vilmorin's Blumengdrt. I. 587 (Sept. 



or Oct., 1894). Zabel in Mitt. Deutsch. Dendr. Ges. XI. 31 (1902). 

 A form with white flowers, occasionally found wild under the typical form, e.g. 

 Maine, Mt. Desert, Southwest Harbor. 



Rhododendron canadense f. viridifolium Fernald, n. forma. 



Ramulis glabriusculis; foliis subtus sparse pilosis supra atroviridibus lucidis 

 nee glaucis. 



NOVA SCOTIA: boggy thickets bordering Trefry's Lake, Arcadia, 

 July 29, 1920, Fernald & Long, No. 22,150 (TYPE in Gray Herb.). 



This shrub occurs in scattered clumps on the shore of Trefry's Lake, the only 

 place we met it, the ordinary form of the species with glaucous foliage being 

 generally common in the province. M. L. FERNALD. 



Rhododendron Vaseyi A. Gray in Proc. Am. Acad. XV. 48 (1879) ; in 

 Bot. Gaz. VIII. 282 (1883); Syn. Fl. ed. 2, II, 1, 398 (1886). 

 Donnell Smith in Bull. Torr. Bot. Club, XV. 164 (1888). Sargent in 

 Gard. & For. I. 376, fig. 60 (1888). Dippel, Handb. Laubholzk. 

 I. 419 (1889). Skan in Bot. Mag. CXXXII. t. 8081 (1906). 

 Schneider, III. Handb. Laubholzk. II, 495, fig. 325o,327 c-d (1909). 

 Millais, Rhodod. 257, t. opp. p. 10 and 20 (1917). 



Azalea Vaseyi Rehder in Moller's Deutsch. Gartn.-Zeit. XIV. 332, fig. (1899) ; 



in Bailey, Cycl. Am. Hort. I. 122 (1900). 

 Biltia Vaseyi Small, Fl. S. E. U. S. 884 (1903); in N. Am. Fl. XXIX. 49 



(1914) - 1 



1 ADDITIONAL ILLUSTRATIONS. COLORED PLATES: Meehan's Monthl. VII. 121, 

 t. 7 (1897). Garden, LIV. t. 1191, opp. p. 282 (1898). BLACK FIGURES: Gard. 

 Chron. ser. 3, XX. 71 (1896); LI. 313 (1912). Mover's Deutsch. Gartn.-Zeit. XIV. 

 332 (1899) . Gard. LVI. 122 (1899) ; LXXVI. 332 (1912) ; LXXXIV. 239 (1920) . 

 Gard. Mag. V. 219 (1907). Country Life Am. XI. 499 (1907). Bean, Trees & 

 Shrubs Gt. Brit. II. 384 (1914) . Bailey, Stand. Cycl Hort. V. fig. 3391 (1916) , after 

 Gard. & For. HABIT FIGURES: Mailer's Deutsch Gartn.-Zeit. XIV. 333 (1899). 



