ue 
BALFOUR—NEW SPECIES OF RHODODENDRON,. 29 
resemble those of Rh. comisteum, Balf. f. et Forrest, which is 
placed in the Roxieanum series, although the hairs are not quite 
those of the type of the series. Then its glandular inner scale- 
leaves, long bracteoles, dense terminal inflorescence, white corolla 
with crimson markings, puberulous stamens, tomentose ovary and 
glabrous style are all characters found more or less in the Roxie- 
anum series, but its calyx is different, as is the oblique corolla. 
It is not quite the Roxieanum type as exhibited by Rh. Roxte- 
anum, Forrest et W. W. Sm., Rh. recurvum, Balf. f. et Forrest, 
and Rh. proteoides, Balf. f. et W. W. Sm., but is on the fringe of 
that series 
Forrest has recently tapped a region in which there is a great 
development of species which are extremely alike in flower- 
character but in foliage show slight variation in form along with 
marked difference in construction of indumentum, although to 
casual observation the similarity is great. At one extreme are 
forms like Rh. lactewm, Franch. and Rh. Tratllianum, Forrest et 
W. W. Sm., with their unistrate suéde-surfaced indumentum, 
and at the other species like those of the Roxieanum series, with 
a well-developed bistrate woolly tomentum. Between come 
forms grading to each extreme, the elucidation of which is far 
from being accomplished as yet, though several of the species 
are described in these pages. Rh. bathyphyllum is one of them. 
Rhododendron calvescens,* Balf. f. et Forrest.f 
Shrub m. high with few medium-thick branches. 
Branchlets of the year completely enclosed in a pale-coloured 
detersile tomentum of floccose hairs mixed with an under- 
stratum of red ovoid shortly-stalked glands very soon shed, 
branchlets a year old naked or nearly so slightly red not 
glossy, older branches grey and soon decorticating. Foliage-bud 
unknown; young unfolding leaves revolute, on both surfaces 
* calvescens, becoming bald—in allusion to the rapid disappearance of the 
hairs and glands which cover the juvenile parts. 
} Rhododendron calvescens, Balf. f. et Forrest —Frutex ad 2 m. altus ramis 
juvenilibus dense floccosis et rubro-glandulosis, senioribus glabrescentibus. Folia 
i - lamina coriacea oblongo-ovalis ad 3 cm. lata apiculata, 
e paullo revoluta, basi truncatula vel cordulata ; supra opaca glabrescems 
pilorum glandularumque vestigiis plus minusve notata ; infra rufo-brunnea indu- 
mento detersili e glandulis rubris et floccis al ee emer ores 
evioribus composito uw a pallide roseo- pr ula ; 
petiolus si, Pa Inflores aa circ. 8-flora racemoso-umbellata ; pedicelli 
ad 1.3 cm. longi —, et floccosi. Calyx parvus succulentus ae ae 
lobi rotundati vix -5 mm. longi eadulobo-fihbeiatl Corolla campanulata ci 
3-5 cm. longa intus puberula extus glabra 5-loba ; lobi rotundati circ. 1.8 cm. 
. a ro inaequalia corolla breviora ; basi ad ovarii verti- 
cem puberula. Disc us glaber. Gynaeceum corollam subaequans ; arium 
conoideum Hv ee circ. 7 mm. floccosum et aE RE, Veaylis 
glaber sub stigmate lobulato in discum expansus. 
