Tarn. 8400. 
RHODODENDRON AMBIGUUM. 
Western China. 
Ericacear. Tribe RHopoREAR. 
Ruoropenpron, Linn.; Benth. et Hook. f. Gen. Plant. vol. ii. p. 599. 
Rhododendron (Enrhododendron) ambiguum, //ems/.; inter species foliis 
lepidoto-glandulosis R. trifloro, Hook. f., valde affinis, differt tamen foliis 
maturis minus coriaceis, magis acuminatis, lepidibus majoribus minns 
crebris, cymis plus quam trifloris et corolla extra pauci-lepidota intus 
postice viridi-maculata. 
Frutex dense ramosus, ramis floriferis graciliuseulis primum praeter glandulis 
paucis nudis. Folia persistentia, sparsa, petiolata, lanceolata, cum petiolo 
em. longa, acuminata, apice glandula. subglobosa instructa, basi 
rotundata, utrinque primum crebre |-pidoto-glandulosa, supra cito nuda, 
subtus inter lepides primum Iuteas demum feres nigras pallida, venis 
immersis obscuris. Corymbi umbelliformes, terminales, saepius 5-7-flori; 
pedicelli graciliuscnli 1°5-2 cm. longi, curvati, crebre lepidoti. Calyx 
brevissimus, dentibus obtusis. Corol/a late campanulata, circiter 5 cm. 
diametro, viridi-flava, intus pubernla postice viridi-maculata, extra pauci- 
lepidota, tubo brevi, lobis latis rotundatis. Stamina 10, alterna breviora, 
longiora corollam paullo excedentia; filamenta filiformia, medio pilis latis 
tubuloso-vesiculatis 1-locu!aribus dense vestita. Ovarium dense lepidotum, 
5-loculare, stylo glabro stamina paullo excedente. Capsula adhuc ignota. — 
W. Bottinc HEMSLEY. 
Tlie Rhododendron here figured is a member of the group 
of Eurhododendra, the species of which are characterised by 
being more or less lepidote both as regards leaves and 
flowers, and by having both leaves and flowers of medium 
size, the latter often yellow and in few flowered corymbs. 
This group is represented in China by a considerable 
number of closely related forms, including &. Jlutescens, 
Franch., and &. concinnum, Hemsl., which is also in culti- 
vation in this country. ‘he nearest. ally of the form here 
described is perhaps the Himalayan &. triflorum, Hook. f. 
R. ambiguum, which was introduced from Western China by 
Mr. E. H. Wilson on behalf of Messrs. J. Veitch & Sons, to 
whom we are indebted for the material from which our 
figure has been prepared, will be welcomed in gardens as 
an addition to the scanty number of species with yellow 
Octosrr, 1911. 
