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BALFOUR—NEW SPECIES OF RHODODENDRON. 103 
showing as a very fine much-branched reddish reticulum ; 
petiole as much as 2.5 cm. long red grooved above, glabrous but 
with vestiges of the juvenile red glands. Flowers in a terminal 
4~7-flowered umbel or shortly racemose umbel, the rhachis red- 
glandular; bracts unknown; bracteoles shorter than pedicels 
about 8 mm. long linear slightly clavate at top pilose throughout 
not markedly hair-crested ; pedicels 2.5-3.5 cm. long expanded 
beneath the calyx spreading purple sparingly glandular with 
ovoid stalked red glands. Calyx conspicuous about 4 mm. long 
with a cup about I mm. sparingly glandular outside, 5-lobed ; 
lobes yellowish oblong rounded at top about 3 mm. long sprinkled 
with glands. Corolla yellow without spots or blotch openly eup- 
shaped or widely campanulate from the base 4 cm. or a little 
more long, longer than stamens and gynaeceum, glabrous outside 
and inside, 5-lobed; lobes broad nearly orbicular about 2 cm. 
long 2.5 cm. broad emarginate. Stamens Io unequal all shorter 
than corolla and gynaeceum, longest about 2.5 cm. long, shortest 
about 1-5 cm. ; filaments slightly expanded downwards obscurely 
puberulous above the base the hairs often mere vesicular papillae. 
Disk glabrous. Gynaeceum shorter than corolla longer than 
stamens about 3.5 cm. long or a little more; ovary conoid 
grooved truncate 3.5 mm. long densely red-glandular, the stalks 
of the glands yellow ; style glandular with long yellow-stalked 
glands to about its middle, slightly expanded below the lobulate 
dark-coloured stigma. 
N.W. Yunnan. Onthe Bei-ma-Shan. Lat.28°12’N. Alt. 
I1,000-12,000 ft. Shady pine forests and amongst scrub. 
Shrub of 4-8 ft. Flowers yellow without markings. G. Forrest. 
No. 13,939. June 1917. 
One of the Souliei series, with markedly oblong leaves and 
glandular petioles and stems and bearing yellow flowers with 
yellowish calyx-lobes, puberulous stamens, and style glandular 
to the middle. In this corolla it approaches Rh. Wardii, W. W. 
Sm. and Rh. croceum, Balf. f. et W. W. Sm., but the colour is 
not so intense and the flowers are smaller. Rh. panteumorphum, 
Balf. f. et W. W. Sm. of the Selense series, is not unlike our 
plant, and has also yellow flowers, but it has a glabrous style. 
Forrest has collected quite a number of forms of the Souliei 
and Selense series showing that the type which includes many 
good garden plants is widespread in N.W. Yunnan. 
Rhododendron dendritrichum, Balf. f. et Forrest.* 
Shrub as much as 4.5 m. high with stout branches. Branches 
a year old about 4 mm. in diameter ash-grey through a close 
* Rhododendron dendritrichum, Balf. f. et Forrest—Frutex ad 4.5 m. altus 
ramis crassis. Ramuli annotini circ. 4 mm. diam. indumento griseo subaggluti- 
