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 Nouv. Arch. Mus. Paris, s6r. 2, X. 52, t. 12 

 (PL David. 11. 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 Wen-ch'uan Hsien, upon rocks, alt. 2000-2800 m., July 1908 

 (No. 879, in part; bush 0.60-1 m. tall); west and near Wen-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, s^r. 2, X. 51, t. 13' 

 (PI. David. II. 89, t. 13») (1887). 



Western Szechu'an: Mupin, forests, alt. 2600-3000 m., June 

 1908 (No. 3471; epiphytic, 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- 

 dodendron in the sense of Maximowicz, though unfortunately it does not include 

 the type of the genus, which is R. ferrugineum Linnaeus and also R. hirsntum 

 Linnaeus. De Candolle, who first used Eurhododendron, includ(>s them, but Maxi- 

 mowicz, 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, ser. 2, X. 48 {PL 



