ERICACEAE. — RHODODENDRON 525 
A very common species, especially in woodlands where it often forms dense thick- 
ets; the flowers are very variable in color. 
Rhododendron moupinense Franchet in Bull. Soc. Bot. France, 
XXXIII. 233 (1886); in Now. Arch. Mus. Paris, sér. 2, X. 52, t. 12 
(Pl. David. II. 90, t. 12) (1887). — Hemsley & Wilson in Kew Bull. 
Misc. Inform. 1910, 115. 
Western Szech’uan: Mupin, epiphytic on trees, alt. 2000-2600 
m., September 1908 (No. 879, in part; shrub 0.65-1 m. tall); west and 
near Wén-ch'uan Hsien, upon rocks, alt. 2000-2800 m., July 1908 
(No. 879, in part; bush 0.60-1 m. tall); west and near Wén-ch'uan 
Hsien, cliffs, alt. 3000-3300 m., October 1910 (No. 4256; bush 0.60- 
1.25 m. tall, flowers white); Mt. Omei, alt. 2000 m., October 1903 
(Veitch Exped. No. 3937). 
This species is usually found growing upon evergreen oaks and other broad- 
leaved trees, 
Rhododendron dendrocharis Franchet in Bull. Soc. Bot. France 
XXXIII. 233 (1886); in Nouv. Arch. Mus. Paris, sér. 2, X. 51, t. 13* 
(Pl. David. YI. 89, t. 13°) (1887). 
Western Szechu'an: Mupin, forests, alt. 2600-3000 m., June 
1908 (No. 3471; epiphytie, shrub 35—70 cm. tall; flowers bright rosy- 
red); without precise locality, alt. 2800 m., May 1904 (Veitch Exped. 
No. 3938). 
This species is usually epiphytic on Abies and Tsuga. 
Subgen. II. EURHODODENDRON Maxim. . 
Leaves not lepidote, quite glabrous or tomentose beneath, persistent. Ovary 
glabrous, glandular or woolly, never lepidote, often more than 5-celled, stamens 
10-20; flowers always from a terminal bud. 
We have retained for this subgenus, for lack of another name, the name Eurho- 
ron in the sense of Maximowicz, though unfortunately it does not include 
the type of the genus, which is R. ferrugineum Linnaeus and also E. hirsutum 
aeus. De Candolle, who first used Eurhododendron, includes them, but Maxi- 
mowiez, who divided De Candolle’s section, referred the typical species to his new 
Section Osmothamnus and left the remainder in Eurhododendron. - ; 
«the colloquial name in central and western China of the species of this group is 
Yeh-pi-pa"; in Chinese books they are referred to as “ Shan-pi-pa.” 
Group a. 
Leaves covered below with a close and compact tomentum. 
Rhododendron argyrophyllum Franchet in Bull. Soc. Bot. France, 
XXXIII. 231 (1886); in Nouv. Arch. Mus. Paris, sér. 2, X. 48 (Pl. 
