1925] WILSON, THE RHODODENDRONS OF EASTERN CHINA 173 



shoots are red-brown and the bark is thin and peeling in the third year. 

 It is most closely related to R. ciliicalyx Franch. which has glabrous 

 shoots and petioles, a minute calyx and usually acuminate leaves. R. 

 Levinei Merrill was discovered in 1917 on Lo-fau Mountain, and has 

 not been introduced into cultivation. 



15. Rhododendron Kawakamii Hayata in Jour. Coll. Sci. Tokyo, 

 xxx. art. 1, 171 (Mat. Fl. Formos.) (1911). 



Epiphytic shrub, 0.3-1.3 m. tall; branches numerous, slender, often 

 tortuous, glabrous, gland-dotted; bud-scales acute, ciliolate, punctate. 

 Leaves subsessile, coriaceous, glabrous, numerous, clustered into remote 

 false verticils, spathulate to oblanceolate or obovate, 1.5-5 cm., usually 

 2.5-4 cm. long, 0.8-3 cm., usually 1.5-2 cm. wide, rounded, mucronulate, 

 base narrowed, upper surface dark green, lower paler, often yellow- 

 brown, copiously punctate, margin slightly recurved, midrib and sec- 

 ondary veins impressed above, raised below; petiole 0.2-0.5 cm. long, 

 winged. Flowers racemose-umbellate, 5 or more; pedicels spreading, 

 2-2.5 cm. long, sparsely gland-dotted; calyx saucer-shaped, 5-lobed, 

 lobes irregular, oblong, lanceolate or triangular, 1-2 mm. long, glandular- 



ciliolate; corolla glandular-punctate, rotate-campanulate, 1 cm. long, 

 1.2 cm. broad, 5-lobed, lobes broad-oblong, rounded; stamens 10, 

 shorter than the corolla, unequal, filaments villose at the base, anthers 

 oblong, 2.5 mm. long; pistil shorter than the corolla, ovary ovoid, 

 2 mm. long, pubescent, style curved, glabrous, stigma capitate. Fruit 

 oblong-ovoid, about 1.2 cm. long, sparsely villose, dehiscing to base, 

 margins of valves waved. 



Habitat: Formosa, forests on upper parts of Randai-san and Arisan. 



On and around Arisan between 5000 and 8000 ft. above sea-level, this is 

 a very common epiphyte. It is particularly abundant in the forests of 

 C ham aecy parts formosensis Matsum. growing high up in the forks and 

 on the branches of these gigantic trees. But it is not confined to this 



Conifer being found epiphytic on many kinds of trees in these rain forests. 

 It is a bushy plant, from 2 to 5 ft. high and broad, with numerous often 

 gnarled and lichen-clad branches. I did not see it in bloom and my 

 description of the flowers is from Ilayata's original account. The 

 species, as Hayata points out, is closely related to R. emarginatum Hemsl. 

 & Wils, which is native of southern Yunnan. These with which must 

 be associated Rhododendron Vidalii Rolfe and several other Philippine 

 and Malaysian species with their cuneate, spathulate to obovate, verticil- 

 late leaves, punctate on the under surface, form a little group distinct 

 from other sections of the vast genus. All are tropical and many of them 

 epiphytic, the last from necessity rather than choice. None are in culti- 

 vation. 



Rhododendron Kawakamii Hayata was discovered in the neighborhood 

 of Arisan, at an elevation of 7000 ft. above the sea-level, in 1906 by 

 Messrs. T. Kawakami and U. Mori. 



