1925) WILSON, THE RHODODENDRONS OF EASTERN CHINA 183 



Rhododendron Simsii var. eriocarpum Wilson in Wilson & Rehder, 

 Monog. Azal. 49 (1921), where a full account is given. In his Trees and 

 Shrubs of Japan (i. 97, fig. 53. 1922) and in the Tokyo Bot. Mag. 

 (xxxviii. 27. 1924) Nakai has raised this plant to specific rank designat- 

 ing it R. eriocarpum Nakai. 



31. Rhododendron longiperulatum Hayata, Icon. PI. Formos. in. 138 

 (1913).— Kanehira, Formos. Trees, 319, fig. 13, 323 (1917).— Komatsu, 

 in Tokyo Bot. Mag. xxxn. 14 (1918). 



Shrub with numerous twiggy branches, densely clothed with flattened 

 appressed chestnut-brown strigose hairs. Leaves homomorphic, 

 scattered, short-petioled, chartaceous, ovate to ovate-lanceolate, 1-2 

 cm. long, 0.5-1 cm. wide, mucronate, base cuneate, obscurely crenulate, 

 upper surface dark green, lower pale green, with scattered rufous ap- 

 pressed strigose hairs on both surfaces; petiole 1-2 mm. long. Flowers 

 umbellate, 2-3; pedicels stout, 1 cm. long with calyx and ovary densely 

 clothed with shining rufous strigose hairs; calyx discoid, with 5 acute 

 teeth each 2-3 mm. long; corolla red, funnelform-campanulate, about 

 3 cm. long and broad, deeply 5-lobed, lobes spreading, rounded; stamens 

 10, unequal, slightly shorter than corolla, filaments papillose in lower 

 half, anthers dark, ovoid, 1-1.5 mm. long; pistil overtopping stamens, 

 equaling corolla, ovary ovoid, 2-3 mm. long, style filiform, curving, 

 glabrous or nearly so, stigma capitate. Fruit oblong-ovoid, about 7 mm, 



long, strigose. 

 Habitat: Formosa, Taihoku prefecture, Mt. Daiton and Hokuto. 



This Azalea is most closely related to R. Kanehirai Wils. which is 

 distinguished by its subverticillate branches, its more crowded, much 

 longer, more membranous leaves and by its larger flowers with exserted 

 style. In my Monograph of the Azaleas of the Old World I WTongly 

 referred R. longiperulatum Hayata to R. Oldhamii Maxim, as a synonym, 

 with which species I now find it has nothing to do. Indeed, Hayata's 

 species with its neat scattered nearly oval subcoriaceous leaves pallid 

 on the under surface is quite distinct from all of its group. Rhododendron 

 longiperulatum Hayata was discovered on Mt. Daiton by Y. Shimada in 

 1910; it is not in cultivation. 



32. Rhododendron Nakaharai Hayata in Jour. Coll. Sci. Tokyo, xxv. 

 art. 19, 153 (Fl. Mont. Formos.) (1908).— Millais, Rhodod. 216 (1917). 

 Kanehira, Formos. Trees, 319, fig. 15, 325 (1917).— Komatsu in Tokyo 

 Bot. Mag. xxxn. 14 (1918).— Wilson in Wilson & Rehder, 

 54 (1921). 



Rhododendron serpyllifoUum Hayata in Tokyo Bot. Mag. xx. 72 (1906). — 

 Not Miquel. 



An intricately branched shrub, branches twiggy, rigid, clothed with 

 shining brown flattened appressed strigose hairs. Leaves scattered, 

 numerous, oblanceolate to oval, 0.6-1 cm. long, 0.3-0.5 cm. wide, obtuse 

 or subacute, mucronulate, base narrowed, margin slightly recurved, 



Mon 



