516 WILSON EXPEDITION TO CHINA 
Western Szech’uan: south-east of Tachien-lu, thickets, alt. 
2000-2500 m., May and October 1908 (No. 1275, type); same locality, 
margins of woods, alt. 2300 m., June and October 1908 (No. 1274); 
same locality, thickets and woodlands, alt. 3000-3300 m., October 
1910 (Nos. 4280, 4239); vicinity of Tachien-lu, on cliffs, alt. 2300- 
3000 m., September and October 1908 (Nos. 1223, 1276); same locality, 
alt. 2100-3300 m., July 1903 and 1904 (Veitch Exped. Nos. 3947, 
3950 and seed No. 1535); Ching-chi Hsien, Ta-hsiang-ling, thickets, 
alt. 2000-2500 m., May and October 1908 (No. 1352); Ching-chi 
Hsien, Fei-yueh-ling, thickets, alt. 2000-2600 m., May 25, 1908 (No. 
3426). 
This species is closely allied to R. chartophyllum Franchet, which differs chiefly 
in its oblong or narrowly lanceolate leaves, very sparsely lepidote below, longer 
pedicels and larger flowers. We hesitated in making this a distinct species until, 
through the courtesy of the Director of the Royal Gardens at Kew, we received 
a specimen of Franchet’s species from a cultivated plant. Our new species is also 
growing at Kew, where the two plants look decidedly different. Hemsley & Wilson 
(in Kew Bull. Misc. Inform. 1910, 115) refer Nos. 3947 and 3950 to R. rigidum 
Franchet and R. siderophyllum Franchet, respectively. The specimens in this 
herbarium under those numbers have certainly nothing to do with these species. 
, Rhododendron Davidsonianum is a very common plant in exposed sunny situa- 
tions in the vicinity of Tachien-lu and we suspect the specimens collected in 
that neighborhood by Soulié and referred by Franchet (Jour. de Bot. 1895, 398) 
to R. chartophyllum Franchet belong here. The species is very floriferous, the mass 
of flowers almost hiding the small, neat foliage. No. 3426 has leaves up to 8cm. 
long and the shoots appear very vigorous. 
Rhododendron racemosum Franchet in Bull. Soc. Bot. France 
XXXIII. 235 (1886).— Hemsley in Jour. Linn. Soc. XXVI. 28 
(1889). — Watson in Garden, XLII. 320, t. (1892). — Hooker f. in 
Bot. Mag. CXIX. t. 7301 (1893). — Bean in Flora & Sylva, III. 165 
(1905). — Rehnelt in Gartenfl. LVII. 561, fig. 67, t. 1577, fig. 1 
(1908). — Hemsley & Wilson in Kew Bull. Misc. Inform. 1910, 120.— 
Forest in Gard. Chron. ser. 3, XLVII. 343, fig. 147 (1910). 
Rhododendron racemosum, var. rigidum Rehnelt in Gartenfl. LVII. 561, fig. 68, 
t. 1577, fig. 3-4 (1908). 
Western Szech'uan: Ching-chi Hsien, Ta-hsiang-ling, thickets, 
alt. 2000-2600 m., May 16, 1908 (No. 3428; bush 2 m. tall, flowers 
pale rosy-pink). 
This plant is very rare in Szech'uan, but is abundant in north-western Yunnan. 
Rhododendron lutescens Franchet in Bull. Soc. Bot. m 
XXXIII. 235 (1886); in Nouv. Arch. Mus. Paris, sér. 2, X. 52 (P 
