ERICACEAE. — RHODODENDRON 527 
which are irregularly notched. This variety differs from the type chiefly in its 
glabrous branchlets, smaller leaves inclined to be rounded at the base and in the 
broad campanulate or cup-shaped corolla; it is similar to R. hypoglaucum Hemsley 
but differs in its ovary being densely covered with white hairs. 
Rhododendron argyrophyllum, var. omeiense Rehder & Wilson, n. 
var. 
Frutex 2-metralis; ramuli graciles, glabri v. fere glabri. Folia 
oblanceolata v. lanceolata, acuminata, basi cuneata, subtus tomento 
cinereo-albido v. fulvescente obtecta, 7-10 em. longa. Corolla cam- 
panulata, basi leviter angustata, 3.5-4 cm. longa et circiter 4.5 cm. 
diam. 
Western Szech'uan: without precise locality, May 1904 (Veitch 
Exped. No. 3962, type); Mt. Omei, June 1904 (Veitch Exped. No. 
51379). 
This variety differs from the type chiefly in the dun-colored tomentum of the 
under side of the generally smaller leaves and in the broader corolla less narrowed 
at the base. 
Rhododendron hypoglaucum Hemsley in Jour. Linn. Soc. XXVI. 
25 (1889). — Diels in Bot. Jahrb. XXIX. 512 (1910). — Bean in Flora 
& Sylva, III. 164 (1905). — Hemsley & Wilson in Kew Bull. Misc. 
Inform. 1910, III. — Pampanini in Nuov. Gior. Bot. Ital. n. ser. XVII. 
683 (1910). 
Rhododendron gracilipes Franchet in Jour. de Bot. IX. 391 (1895). 
Rhododendron chionophyllum Diels in Bot. Jahrb. XXIX. 512 (1900). 
Western Hupeh: Fang Hsien, woods, alt. 2300 m., May 19, 
1907 (No. 3443, in part; bush 2.5-6 m. tall, flowers white with reddish 
blotch); Hsing-shan Hsien, woods, alt. 1600-2300 m., May 14, 1907 
(No. 3443, in part; bush 2.5-4 m. tall, flowers pale rose-pink) ; Changlo 
Hsien, woods, alt. 1600-2000 m., May 1907 (No. 3443, in part; bush 
1-3 m.tall, lowers, white, spotted) ; Patung Hsien, woods, alt. 2000 m., 
May 1907 (No. 3443, in part; bush 2.5—4 m. tall, flowers pink, spotted) ; 
without locality, May 1900 (Veitch Exped. No. 311). 
This is an exceedingly common species in western Hupeh and possibly only a 
geographical form of R. argyrophyllum Franchet. The ovary varies from hirsutely 
glandular to glabrous, as described by Diels for his R. chionophyllum, and with 
the material before us we cannot separate this species. The pedicels in R. hypo- 
glaucum Hemsley vary considerably in length and are either glabrous or sparsely 
Pubescent; the loan of a specimen of R. gracilipes Franchet from the Paris 
Museum has enabled us to establish the identity of these two species. R. graci- 
m Franchet and R. chionophyllum Diels are identical and merely non-glandular 
orms of R. hypoglaucum Hemsley. 
