ENUMERATION OF THE SPECIES 75 



(1911). — Matsumura, Ind. PI. Jap. II. pt. 2, 463 (1912). — Millais, Rho- 



dod. 205 (1917). — Komatsu in Tokyo Boi. Mag. XXXII. [13] (1918). 

 Azalea macrosepala K. Koch, Dendr. II. pt. 1, 180 (1872). — O. Kuntze, Rev. 



Gen. II. 387 (1891). 

 Rhododendron linearifolium 0. macrosepalum forma a. genuinum Makino in 



Tokyo Bot. Mag. XXVII. 108 (1913). 



Japan: Kyushu, prov. Hizen, roadside, Nagasaki to Mogi, No- 

 vember 12, 1903, C. S. Sargent. Shikoku, prov. Tosa, thickets up to 

 300 m. alt. November 20, 1914, E. H. Wilson (No. 7794). Hondo, 

 prov. Settsu, near Kobe, April, 1875, H. N. Moseley (Herb. Kew); 

 prov. Kawachi, Yomomoto and Ikeda, May 8, 1918, E. H. Wilson 

 (No. 10,355); prov. Yamato, Koyasan, August 26, 1907, U. Faurie 

 (No. 124); Yoshino, April 22, 1914, E. H. Wilson (No. 6574, in part); 

 prov. Yamashiro, Kyoto, Temple Garden, October 16, 1892, C. S. 

 Sargent; Kyoto, J. Rein, ex Mus. Bot. Berol. (Herb. Bur. Sci. Manila) ; 

 prov. Omi, mountains round Lake Biwa, April 30, 1892, U. Faurie 

 (No. 7820, Herb. Kew) ; prov. Mino, Pine-barrens near Gifu, October 

 20, 1892, C. S. Sargent; prov. Mikawa, Pine-woods, Futagawa, May 9, 

 1918, E. H. Wilson (Nos. 10,346, 10,348, 10,349); prov. Shimotsuke 

 " alpe Niko," 1866-74, L. Savatier (No. 766, Herb. Kew). 



This is the Mochi-tsutsuji (Glandular Azalea) of Japan, where it is common in 

 central Hondo at low altitudes from near Osaka north to Hamamatsu in Totomi 

 province; also in Tosa province, Shikoku. It is partial to gravelly soil and dry 

 situations such as Pine-woods and open thickets afford. A social plant it occurs 

 in great numbers either alone or with R. dbtiisum var. Kaempferi Wils. At Futa- 

 gawa, for instance, in Pine-woods these two species grow in thousands and in early 

 May when in full blossom they are conspicuous from the railway carriage windows. 

 The specimen from Nagasaki is probably from an escaped plant and there is no 

 other record of its growing in Kyushu. North of Totomi province I have not seen 

 it wild, and I think there is some mistake about it being indigenous in the Nikko 

 region, Maximowicz's statements and Savatier's specimens notwithstanding. It is 

 not mentioned by Matsumura in his Plants of Nikko nor by Hayata in his Vege- 

 tation of Mt. Fuji. 



As usually seen R. linearifolium var. macrosepalum is a low, rather laxly branched 

 shrub spreading in habit and less than one metre high but in Shikoku I saw it 

 full three metres tall. It has the usual dimorphic leaves and these are mostly 

 deciduous. The shoots are terete and with the petioles are densely clothed with 

 gray to gray-brown pilose (some of them gland-tipped) hairs and a few flattened, 

 spreading bristles which disappear in the second season; the winter-buds are ovoid, 

 acute, densely covered with strigose, yellow-brown hairs. The leaves are mem- 

 branous, scattered on the free-growing shoots and crowded on others, short- 

 petioled, lanceolate-ovate to ovate-elliptic, sometimes lanceolate or ovate, short 

 acuminate, acute or merely mucronulate; those immediately beneath the winter- 

 buds oblanceolate to oblanceolate-oblong obtuse, or rounded, usually mucronulate, 

 the under surface clothed with soft, spreading, gray to gray-brown glandular hairs, 

 the upper surface sparsely glandular hairy, slightly rugulose and hispid; dull green 

 during summer changing to rich vinous purple in the autumn. The flowers are 



