548 WILSON EXPEDITION TO CHINA 
Exped. No. 5143); without locality, A. von Rosthorn (No. 2148). 
Yunnan: Mi-lé, forests, A. Henry (No. 9900*); Mengtze, grassy 
mountains, alt. 2000 m., A. Henry (Nos. 99005, 9900°); Szemao, alt. 
1600 m., A. Henry (No. 99002). 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 limits 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, Ill. Handb. Laubholzk. 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. 606, 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. 
606, in part; erect bush, leaves deciduous, 1-2.5 m. tall, common); 
without precise locality, April 1900 (Veitch Exped. No. 29, type), 4- 
Henry, Nos. 3829, 5274. Kiangsi: Kuling, thickets, alt. 1300 n 
July 29, 1907 (No. 1681; 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. : R 
Rhododendron Mariesii Hemsley & Wilson, with R. rhombicum Miquel, P. 
dilatatum Miquel, R. Schlippenbachii Maximowicz, R. Weyrichii Maximowicz in 
R. quinqueloculare Moore & Bisset must be placed in the section Tsutsuts?, Y 
all these species the young shoots spring from the axils of the lower scales of 
same terminal bud as the flowers, while in Euazalea they spring from 
