ENUMERATION OF THE SPECIES 53 



(1911). — Matsumura, Ind. PI. Jap. II. pt. 2, 465 (1912). — Ko- 

 matsu in Icon. PI. Koisikav. II. 91, t. 130 (1915); in Tokyo Bot. Mag. 

 XXXII. [17] (1918). 



Japan: Shikoku, prov. Tosa, round Kochi, sea-level to 1000 m. 

 altitude, November 20, 1914, E. H. Wilson (No. 7801). 



A twiggy, eglandular shrub growing from 0.3 to 2.5 m. but usually from 1 to 

 1.5 m. tall, with slender branches clothed with appressed, straight gray to gray- 

 brown hairs. The leaves are scattered on the shoots and free-growing branches 

 and crowded at the end of the branchlets. They are more or less deciduous and 

 change in the autumn to purplish crimson; those formed in the spring are oblance- 

 olate or lanceolate from 1.2 to 3.5 cm. long and from 0.5 to 1 cm. broad and are 

 acute and clothed with appressed, straight, gray hairs; the summer leaves are 

 linear to oblanceolate from 0.5 to 1 cm. long and from 1 to 5 mm. wide. The 

 flowers are produced in clusters of from 2 to 6, but occasionally are solitary. The 

 corolla is lilac-purple, about 3 cm. across. The pedicels are short and the calyx 

 is very small and clothed with long, straight white hairs. The stamens vary in 

 number from 5 to 8, are of unequal length, included and overtopped by the style 

 which is exserted. The fruit is ovoid, about 9 mm. long, clothed with appressed, 

 straight hairs and subtended by the persistent calyx-lobes. 



The species is abundant on the lower mountain-slopes of Tosa province, Shi- 

 koku, from sea-level to altitudes of 1000 m. On exposed slopes it is dwarf and 

 dense in habit, but in thickets it is tall and loosely branched. The summer 

 leaves are minute and with the slender twiggy branchlets easily distinguish this 

 species from others. I have seen a few flowers, but the color is not attractive 

 though doubtless in spring when covered with blossoms, the plant would have a 

 charm of its own. I saw plenty of it in November, 1914, and collected seeds for 

 the Arnold Arboretum. These were distributed but the plants raised here have 

 not proved hardy. 



Rhododendron serpyllifolium Miquel in Ann. Mus. Lugd.-Bat. II. 

 165 (1865-66); Prol. Fl. Jap. 97 (1866-67). — Maximowicz in Mem. 

 Acad. Sci. St. Petersbourg, sfr 7, XVI. 42, t. 4, figs. 18-25 (Rhodod. 

 As. Or.) (1870). Franchet & Savatier, Enum. PL Jap. I. 292 (1875).— 

 Hooker f. in Bot. Mag. CXXII. t. 7503 (1896). — Boissier in Bull. 

 Herb. Boiss. V. 919 (1897). — Matsumura in Bot. Mag. Tokyo XIV. 

 69 (1900); Ind. PI. Jap. II. pt. 2, 464 (1912). — Schneider, III. Handb. 

 Lavbholzk. II. 507, fig. 333 a-d (1911). — Bean, Trees & Shrubs 

 Brit. Isl. II. 378 (1914). — Millais, Rhodod. 240 (1917). — Komatsu in 

 Tokyo Bot. Mag. XXXII. [15] (1918). 



Azaleaf serpyllifolia A. Gray in Perry, Jap. Exped. II. 315 (1857); in Mem. 

 Am. Acad. n. ser. VI. 399 (1858-59) . — Masters in Gard. Chron. n. ser. XVII. 

 429 (1882). 



Japan: Kyushu, prov. Osumi, Mt. Takakuma, March, 1912, K. 

 Toyohira; prov. Hizen, Mt. Unzen, April 14, 1914, K. Sakurai; Naga- 

 saki, cultivated, 1863, C. Maximowicz (Herb. Kew). Hondo, prov. 

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



