ENUMERATION OF THE SPECIES 165 



This variety is apparently restricted to the mountains of North Carolina and 

 grows in swamps or sometimes in woods or on mountain slopes. It was introduced 

 into cultivation through the Arnold Arboretum, where plants were raised from 

 seed collected in January, 1919, by Mr. T. S. Harbison near Highlands. With it 

 grows a form with glaucescent leaves and often more intensely pink flowers which 

 may be distinguished as: 



Rhododendron viscosum var. montanum f. coerulescens Rehder, 

 f. nov. 



A typo recedit foliis subtus glaucis et supra glaucescentibus vel opace coeruleo- 

 viridibus et floribus saepius plus minusve roseis. 



NORTH CAROLINA. Macon County: Highlands, alt. 3825 and 

 3900 ft., July 9 and September 30, 1918 (No. 66, type, Nos. 57 and 65), 

 June 17, 1918 (No. B 39), June 19, 1918 (No. 35), September 2, 1920 

 (No. 116), July 14, 1920 (No. 5845), T. G.Harbison. Avery County, 

 Linville (Plant collected by H. H. Richardson and cultivated in his 

 garden; specimen June 28, 1918). Transylvania County: Little 

 Pisgah Mountain, alt. 5100ft., June 24, 1909, H. D. House (No. 4311; 

 Nat. Herb. No. 513,348). Buncombe County: Asheville, May, 

 1888, G. McCarthy (Nat. Herb. No. 42,623). 



This form appears quite distinct with its bluish green leaves glaucous beneath 

 and the more or less pink flowers which are in the plant brought by Mr. Richard- 

 son from Linville in 1913 carmine in bud and suffused with rosy pink all over when 

 open. As an ornamental shrub it is certainly one of the handsomest forms of 

 Rhododendron viscosum. 



Rhododendron viscosum var. aemulans Rehder, var. nov. 



A typo praecipue recedit foliis majoribus latioribusque ad 6 cm. longis et ad 

 3.5 cm. latis, subtus glaucescentibus v. pallidis plerumque obovatis saepe obtusius- 

 culis, ramulis praesertim apicem versus dense ferrugineo-strigosis, floribus majori- 

 bus, tubo fere 3 cm. longo satis dense villoso, perulis dense griseo-sericeis. 



GEORGIA. Randolph County: in low woods near Cuthbert, 

 May 9, 1918, T. G. Harbison (No. 39, type, Nos. 36, 37, 38). Here 

 may also belong Harbison's Nos. 17 and 20, Cuthbert, low shrub in 

 burned-over pine woods, March 29, 1918. 



This is a very perplexing form and seems to be equally closely related to R. vis- 

 cosum, R. serrulatum var. georgianum and R. oblongifolium. From the first it differs 

 chiefly in the larger leaves glaucescent beneath, the densely rufous-strigose branch- 

 lets, the larger rather densely villose flowers and the densely pubescent winter- 

 buds; from the second it differs in its early flowering time, the more villose corolla, 

 and from the third in the densely rufous-strigose branchlets, destitute or nearly 

 destitute of villose pubescence, in the more densely glandular corolla and in the 

 small sepals. The winter-buds are densely grayish pubescent. The leaves are 

 obovate to nearly elliptic often almost rounded at the apex, mucronulate, 3 to 6 

 cm. long and 1.5 to 3.5 cm. broad, glabrous above, the upper ones narrower and 

 acute and strigillose above, pale or glaucescent beneath and glabrous except the 



