108 JOURNAL OF THE ARNOLD ARBORETUM [vol. vi 



related to R. formosanum Hemsl. which is a more vigorous plant with 



rounded bud-scales, a very much larger inflorescence, and pedicels densely 



clothed with short curled rufous-brown pubescence and a glabrous style. 



Rhododendron fokienense Franch. was discovered on the mountains 



round Kuatnn in April, 1898, by J. de la Touche. It is unknown to nie 

 except from Franchet's description and photographs of the type specimens 

 preserved in Herb. Paris. It would appear to be a very critical plant 

 but in the present imperfect state of our knowledge of the flora of Fokien 

 it would be unwise to unite it witli any known species. It is not in culti- 

 vation. 



9. Rhododendron hyperythrum Hayata, Icon. PI. Formos. in. 133 



(1913).— Kanehira, Formos. Trees, 31!), fig. 5, 3^20 (1!)17). 



Rhododendron rubro-punctahim Havata, Icon. PI. Formos. in. 141 (I'M.']). — 

 Kanehira, Formos. Trees, 319, fig. 7, 327 (1017). 



Hush with stoui branches, glaucescent the first year. Leaves coriace- 

 ous, oblong to elliptic-oblong, without petiole 7-12 cm. long, 2-3.5 cm. 

 wide, abruptly subacute, base narrowed, glabrous on upper surface, 

 dotted with rufous pustulate glands on lower, midrib impressed above, 

 prominent below, secondary veins ascending-spreading, slightly raised 

 on under surface; petiole stout, glabrous, 1.5 2.5 em. long, furrowed 

 above. Flowers racemose-umbellate, 10 or more; pedicels ascending- 

 spreading, 3-4.5 cm. long, sparingly glandular; calyx saucer-shaped 

 with 5 small irregular rounded or acute teeth, glandular; corolla wide- 

 funnelform-campanulate, about 4.5-5 cm. long and broad, dotted with 



dark honey-guides, 5-lobed, lobes rounded; stamens about 10, unequal 



in length, shorter than corolla, filaments filiform, flattened and pubescent 

 at base, anthers oblong, 15 mm. long; pistil as long as corolla, ovary 

 ovoid, 0.6 em. long, furrowed, densely glandular, style filiform, curving, 

 sparsely glandular in lower half, stigma large, capitate, lobed. Fruit 

 not seen. 



Habitat: Formosa, Mt. Shichisei, and central regions of the island. 



This is a very handsome Rhododendron, well distinguished by the 

 multitude of red-brown minute pustules which dot the lower surface of 

 its elliptic-oblong leaves. It obviously belongs to the sect ion Leiorhodium 



and not to that of Lepipherum, in spite of the presence of these pustulate 

 leaf-glands. I know of no other species so anomalous. Unfortunately 

 I did not see this Rhododendron growing in Formosa, and my knowledge 



of it is based on co-type herbarium specimens. The species was dis- 

 covered in central Formosa by N. Konishi and is not in cultivation. 

 On material collected by S. Sasaki in 11)10 on Mt. Shichisei in Taihoku 

 Prefect ure, Hayata has based another species (R. rubropunctatum) . 

 1 can find nothing to distinguish these supposed two species; both have 

 the remarkable pustulate glands on the under surface of the leaves. 



10. Rhododendron Westlandii llemsley in Jour. Linn. Soc. xxvi. 31 

 (1889). — Dunn & Tutcher in Kew Bull. Misc. Inform, add. ser. x. 155 



