164 THE AZALEAS OF NORTH AMERICA 



is given by Pursh as occurring "on the borders of lakes on the highest parts of the 

 Blue Mountains: New York and Pennsylvania"; by Britton it has been reported 

 from Shawangunk Mountain, Ulster County, New York, and Montauk Point, Long 

 Island, and by Porter from Monroe County, Pennsylvania, but I have not yet seen 

 a specimen which agrees with Pursh's description. The specimen from Montauk 

 Point I consider a rather copiously strigose specimen of typical R. viscosum. 



Rhododendron viscosum var. montanum Render, var. nov. 



A typo recedit gemmis florif eris perulis paucioribus sericeo-pubescentibus praedi- 

 tis, ramulis minute-villosulis et praesertim apicem versus pilis longis patentibus 

 pallidis instructis ut petioli, foliis subtus ad cost am sericeo-strigulosis v. subpaten- 

 tim hirsutis et satis dense v. interdum sparsissime minute villosulis vel interdum 

 fere glabris, pedicellis dense glanduloso-pilosis. 



North Carolina. Macon County: Highlands, alt. 3825 and 

 3900 ft., July 9 and September 30, 1918 (No. 58, type, No. 60); alt. 

 3900 ft., June 20 and September 30, 1918 (Nos. 40, 41), July 9, 1918 

 (No. 63), June 13, 1918 (No. 38), June 20, 1918 (Nos. 31, 36), Sep- 

 tember 2, 1910 (No. 117), June 10, 1911 (No. 650), July 2, 1911 (No. 

 656), T. G. Harbison; Mt. Satuloh, June 21, 1898, A. P. Anderson 

 (No. 1507; Nat. Herb. No. 344,433). Buncombe County: Bilt- 

 more, June 12, 1897 (Biltmore Herb. No. 1399 a), -vicinity of Black 

 Mountain, Sept. 8, 1913, P. C. Standley & H. C. Bollman (No. 10,453; 

 Nat. Herb. No. 689,191). Wake County: Raleigh, June 11, 1918, 

 T. G. Harbison. 



This variety differs from the type chiefly in its pubescent winter-buds with 

 comparatively few scales, in the spreading hairs and the minute pubescence of the 

 branchlets and pedicels and of the midrib of the under side of the leaves. It is a 

 low densely branched shrub, usually not exceeding 1.25 m. in height. The silky- 

 pubescent winter-buds have only 5 to 7 larger broad rounded scales with 3 to 4 

 small acuminate scales at the base. The young branchlets are minutely puberu- 

 lous and toward the apex more or less densely furnished with long spreading pale 

 hairs not brown and loosely accumbent as on the otherwise glabrous branchlets 

 of the typical plant. The leaves are obovate to oblong-obovate, 2.5 to 4 cm. long, 

 glabrous and bright green somewhat lustrous above, the terminal leaves very rarely 

 strigose, lighter or paler green beneath, the midrib with long pale subaccumbent 

 or sometimes more or less spreading hairs and besides usually minutely villose 

 particularly toward the base; the very short petioles have a pubescence similar to 

 that of the branchlets. The flowers appear from the middle of June to the begin- 

 ning of July; their pedicels are finely villose and rather densely glandular-pilose; 

 the corolla is finely villose and furnished with numerous red long-stipitate glands 

 and seems to be usually more or less suffused with pink; the calyx-lobes are very 

 short; the style is purplish above, with purple stigma. The capsule is oblong- 

 ovoid, 0.8 to 1.5 cm. long, finely villose and glandular-setose. The variety seems 

 to be similar to and may be identical with Azalea hispida of Pursh, which is also a 

 mountain form of R. viscosum; but Pursh describes his plant as 10 to 15 feet tall, 

 the leaves as hispid above and the calyx-teeth as oblong, while this variety is a 

 low shrub, with the leaves smooth above or only very exceptionally strigillose 

 above, and the calyx-teeth very short. 



