548 WILSON EXPEDITION TO CHINA 



Exped. No. 5143); without locality, A. von Rosthorn (No. 2148). 

 Yunnan: Mi-le, forests, A. Henry (No. 9900"); Mengtze, grassy 

 mountains, alt. 2000 m., A. Henry (Nos. 9900^, 9900=); Szemao, alt. 

 1600 m., ^. i/enr?/ (No. 9900^^). Kwangtung: Hongkong, Happy 

 Valley, November 5, 1903, C. S. Sargent. Chekiang: Chusan 

 Islands, Pootoo, Faber. 



This plant is abundant in western Hupeh and in Szech'uan up to 1500 m. alti- 

 tude, where in May the thin, dry woods, cliffs and dry thickets are commonly a 

 blaze of scarlet from its flowers. Our specimens show considerable variation in the 

 size of the leaves but their size depends on altitude. At a low altitude the leaves 

 are large and are all persistent, while at the upper Umits of the species the 

 leaves are very much reduced in size and are more or less deciduous. A colloquial 

 name for this shrub is " Yin-shan-hung." 



Rhododendron Mariesii Hemsley & Wilson in Kew Bull. Misc. 

 Inform. 1907, 244. — Hutchinson in Bot. Mag. CXXXIV. t. 8206 

 (1908). — Schneider, 7//. Handb. Lauhholzk. II. 496 (1909). 



Rhododendron Weyrichii Hemsley in Jour. Linn. Soc. XXVI. 32 (non Maxi- 



mowicz) (1889). 

 Rhododendron Farrerae, var. leucotrichum Franchet in Jour, de Bot. IX. 394 



(1895). — Diels in Bot. Jahrb. XXIX. 513 (1900). 

 Rhododendron Farrerae, var. Weyrichii Diels in Bot. Jahrb. XXIX. 513 (1900). 

 Rhododendron Farrerae, var. mediocre Diels in Bot. Jahrb. XXIX. 514 (1900). 

 Rhododendron rhombicum Diels in Bot. Jahrb. XXIX. 514 (non Miquel) 



(1900). 



Western Hupeh: north and south of Ichang, dry woods and 

 cliffs, alt. 300-1300 m.. May 1907 (No. 6o6, in part; erect growing 

 bush 1-2.5 m. tall, flowers rose-pink, abundant); Hsing-shan Hsien, 

 woods and cliffs, alt. 300-1300 m., May and November 1907 (No. 

 6o6, in part; erect bush, leaves deciduous, 1-2.5 m. tall, common); 

 without precise locality, April 1900 (Veitch Exped. No. 29, type), A. 

 Henry, Nos. 3829, 5274. Kiangsi: Kuling, thickets, alt. 1300 m., 

 July 29, 1907 (No. i68i; bush 1-2 m. tall, abundant). Fokien: 

 without locality, Dunn's Exped., April to June 1905 (Herb. Bot. 

 Gard. Hongkong, No 2882). 



This and Rhododendron sinense Sweet are the only deciduous leaved species 

 reported from central and western China. In the Fokien specimens the pubescence 

 is rufous-gray; on the specimen from Kiangsi both white and rufous-gray pubes- 

 cence occur on the same branch. 



Rhododendron Mariesii Hemsley & Wilson, with R. rhombicum Miquel, R. 

 dilatatum Miquel, R. Schlippenbachii Maximowicz, R. Weyrichii Maximowicz and 

 R. quinqueloculare Moore & Bisset must be placed in the section Tsutsutsi, as in 

 all these species the young shoots spring from the axils of the lower scales of the 

 same terminal bud as the flowers, while in Euasalea they spring from separate 



