50 THE AZALEAS OP THE OLD WORLD 



Japan : Kawanabe Islands, Suwanose-shima, May, 1917, H. Ushiwo 



(No. 1°); Takara-shima, May 4, 1917, H. Ushiwo (No. l d , l e ); Taira- 



shima, May, 1917, H. Ushiwo (No. l f )- 



These specimens were collected for me by Forestry-oflBcer Ushiwo by courtesy 

 of Dr. Naito, chief of the Kagoshima forestry bureau, and are excellent, though 

 unfortunately unaccompanied by field notes. The flowers of the Takara-shima 

 specimens are white, those of that from Taira-shima pink or rose-colored. The 

 color of the flowers and of the pubescence more readily distinguish this variety 

 from the type than does the shape of the leaves pointed out by Hayata. I am sorry 

 that I did not see this interesting plant in a wild state and am inclined to the view 

 that ultimately it may prove to be a distinct species. The Kawanabe Islands are 

 a number of small rocky eminences which jut out of the sea south of Yaku-shima 

 toward the Liukfu Islands and have a flora like that of Liukiu (see Jour. Arnold 

 Arb. I. 183-186 [1920]). 



Rhododendron atrovirens Franchet in Bull Soc. Bot. France, 



XXXIII. 235 (1886). — Hemsley in Jour. Linn. Soc. XXVI. 19 



(1889). — Millais, Rhodod. 124 (1917). 



The species from western Yunnan is unknown to me, except from Franchet's 

 description. It would appear to be intermediate between R. Simsii Planch, and 

 B. microphyton Franch. It is said to be a large bush or small tree with lanceolate, 

 long-acuminate leaves narrowed to the base and glaucescent on the underside. The 

 flowers are described as red, clustered 3 or 4 together, and each 2.5 cm. or less in 

 diameter. It was discovered by Pere Delavay at " Tchen-fang-chan " near Ta- 

 kouan in May, 1882, but apparently has not yet been introduced to cultivation. 



Rhododendron lasiostylum Hayata, Icon. PI. Formos. III. 135 

 (1913). — Kanehira, Formos. Trees, 321 (1917). — Komatsu in Tokyo 

 Bot. Mag. XXXII [14] (1918). 



Formosa: prov. Nanto, between Shushu and Horisha, March 12, 

 1918, E. H. Wilson (No. 10,020). 



This is a pretty pink-flowered Azalea of which I have seen only one plant. It 

 was growing on top of a rock by the trolley line at about 400 m. altitude, and was 

 about 1 m. high and less broad. The branches are slender and twiggy and when 

 young clothed with the usual appressed, flattened chestnut-brown hairs. The 

 young leaves, petioles, pedicels, calyx and ovary are all densely clothed with chest- 

 nut-brown pubescence changing to gray. The leaves are dimorphic; the spring 

 leaves are lanceolate to ovate-lanceolate and from 2 to 4.5 cm. long and 1 to 1.5 cm. 

 wide, acute and deciduous; the summer leaves are oblong-obovate to oblanceo- 

 late from 2 to 4.5. cm. long and 1 to 2 cm. wide, rounded and mucronate at apex 

 and cuneate at base; both surfaces are clothed with appressed gray to rufous* 

 brown hairs. The flowers are terminal, three or four together at the end of the 

 branchlet. The corolla is funnel-shape, pink, about 2 cm. long with spreading 

 lobes and about 2.5. cm. across, the tube being rather less than 1 cm. long. The 

 calyx is variable in size being either nearly obsolete or with distinct, rounded lobes 

 each a millimetre or more long. The stamens are of unequal length, the longest 

 equalling the corolla-lobes and overtopped by the style. It is with considerable 

 hesitation that I identify my specimens with this species. There are many dis- 

 crepancies but of trivial character the more important being the difference in 



