Lq% 
See 
104 BALFOUR—NEW SPECIES OF RHODODENDRON. 
entiation of species amongst those yellow-flowered Lapponicums, 
My knowledge of them at this time leads me to differentiate 
the five species named in the preceding lines—Kh. psilostylum 
being the plant diagnosed by Rehder and Wilson as Rh. flavidum 
var. psilostylum. We have at Edinburgh a plant under Wil- 
son’s number 1202 which therefore ought to be the Rh. flavidum 
of the Plantae Wilsonianae, but which is certainly not Rf. 
flavidum of Franchet nor yet Rh. primulinum of Hemsley. It 
has now flower-buds for the first time. Until they expand and 
the plant can be assigned its right place a discussion of the 
relationships in the series would be premature. 
. Rhododendron orthocladum,* Balf. f. et Forrest. 
A small densely but not intricately branched shrub about I 
m. high with straight ascending divaricate twiggy branches. 
Branches of the year not 1 mm. in diameter densely scurfy with 
overlapping ferruginous and pale-green intermixed peltate scales 
which remain more or less as small warts on the blackening older 
twigs which soon decorticate. Foliage-buds very small ovoid en- 
closed in a few lepidote and ciliate scale-leaves. Leaves petiolate 
as much as 1.5 cm. long persisting for 2 or 3 years; lamina cori- 
aceous linear-lanceolate slightly narrowed at both ends as much 
as I.4 cm. long 3 mm. broad, apex obtuse and mucronulate, 
margin flat or slightly recurved, when young distantly ciliate 
with long hairs erectly branched from above the middle the 
branches thin and sharp-pointed, when older obscurely notched 
by the scars of the fallen hairs, base obtuse or cuneate ; upper 
surface grey-green lepidote with contiguous and overlapping 
* o04dc, straight—in allusion to the form of the branches. 
+ Rho hododendron orthocladum, Balf. fi et Forrest. -—Frutex nanus ad 1 m 
R divaricati haud intricati, hornotini porriginosi squamis 
peltatis imbricatis ferrugineis et albido-viridibus intermixtis vestiti. Folia 
petiolata ad 1.5 cm. lon mina coriacea lineari-lanceolata ad 1.4 cm. longa 
lobi 5 elliptici vel oblongi. Stamina ro corolla breviora ; filamenta albida basi 
aurantica et villosa; antherae rubrae. Discus puberulus. Gynaeceum stamini- 
revius ; Ovarium circ. 1.5 mm. longum conoideum truncatum imbricatim 
albido-lepidotum ; stylus glaber ruber; stigma purpureum. Capsula ovoidea 
cire. 3.5 cm. longa sq iccis vestita vab apice valvis 5 dehiscens. 
