Taz. 8759. 
RHODODENDRON sIDEROPHYLLUM. 
Yunnan. 
Ericaceak. Tribe RHoDOREAE. 
Ruopopenpron, Linn.; Benth. et Hook. f. Gen. Plant. vol. ii. p. 599. 
Rhododendron siderophyllum, ranch. in Journ. de Bot. vol.'xii. p. 262 (1898) ; 
Hemsl., et E. H: Wils. in Kew Bull. 1910, p. 115; Millais, Rhod. p. 242; 
species R. Davidsoniano, Rehd. et Wils., affinis sed foliis supra glandulis 
nigris conspicue ornatis infra densissime ferrugineo-glandulosis differt. 
Frutex laxe ramosus; ramuli parce foliati, superne glandulis resinosis 
sessilibus instructi. Folia lanceolata vel oblongo-lanceolata, apice sensim 
acuta, basi angustata, 83-6 cm. longa, 1-2 cm. lata, tenuiter chartacea, 
minute crenulata, supra glandulis nigris laxe infra glandulis ferrugineis 
dense obtecta, glandulis infra fere contiguis; nervi laterales vix perspicui ; 
petiolus circiter 8 mm. longus, glandulosus. Gemmae floriferae in axillis 
foliorum superiorum solitariae, circiter 3-florae ; perulae dorso dense glandu- 
liferae, ciliatae; pedicelli squamis cinereis sessilibus dense obtecti, 1-5-2cm. 
longi, graciles. Calyx obsoletus, margine undulatus, extra densissime 
glandulosus. Corolla rosea, indistincte bilabiata, dorso in tubo rubro- 
maculata ; tubus apertus, 1 em. longus, extra eglandulosus ; lobi 5, patuli, 
oblongo-ovati, extra parce glandulosi. Stamina 10, declinata, longe 
exserta ; filamenta inferne parce pilosa; antherae pallide flavae, 2°5 mm. 
longae. Ovariwm 5-loculare, glandulis sessilibus obtectum; stylus 
staminibus paullo longior, roseus, glaber, stigmate viscido coronatus. 
Fructus haud visus.—J. Hurcarson. 
The Riododendron here figured is a native of Yunnan, 
where it was originally met with by the Abbé Delavay 
and where it has since been collected by Messrs. Ducloux, 
Soulié, Wilson and Forrest. The last mentioned traveller 
records it as occurring on dry wooded hills to the north 
of the Tsu-hsiong-fu valley at elevations of from 6,000- 
7,000 feet. It was first described by the late Mr. 
Franchet as /. siderophyllum. Its nearest ally in the 
genus is A. Davidsonianum, Rehd.'& Wils., figured at 
t. 8605 of this work, and it shares with that species and 
a few others belonging to the group with glandular 
leaves the peculiarity of producing its flowers from 
several axillary buds, instead, as is more usual, of doing so 
only from a terminal one. From R. Davidsomanum our 
Aprit—Juneg, 1918, 
