BALFOUR—NEW SPECIES OF RHODODENDRON. 55 
Rh. diphrocalyx *—by which name Mr. Magor’s plant is known 
—shows a larger flower than belongs to Rh. dimidiatum. The 
flowers are, as has been stated, outwardly like those of Rh. 
neriiflorum. The calyx is remarkable from its size—on the 
posterior side reaching to the top of the corolla-tube, and being 
as brightly coloured as the corolla. Both calyx and corolla 
are spotted. Other flower-differences from Rh. dimidiatum 
are—the stamens are puberulous and the style is floccose. The 
former is a character of difference too from Rh. neriiflorum, 
the latter one of resemblance with it, and the ovary also has 
more of a taper at the top, as we find it in Rh. neriiflorum. The 
puberulous stamens are found in Rh. dimitrum, as is also the 
floccose style. In the foliage we find pointed leaves and a 
green under surface to the leaf, and there are setulose glands 
on the lamina, petiole, and young stems, as there are in Rh. 
dimidiatum. The glands are larger and more conspicuous, and 
the epidermal papillae are more numerous and form lower 
domes than in Rh. dimidiatum. 
The same question of natural hybridisation is raised by 
Mr. Magor’s plant—but with the different element of Rh. habro- 
trichum as a parent instead of Rh. callimorphum. 
Rh. habrotrichum is a Shweli-Salween plant, and the dis- 
tributional elements in the problem are therefore the same in 
the two cases. Structurally Rh. habrotrichum is a plant with 
large leaves as much as 12 cm. long and 7 cm. in diameter, and 
they are pointed. They as well as the stems carry quite long 
setulose glands with a few hair-flocks, and the glands are very 
persistent: the leaves and stems are not glabrescent above. — 
The under surface of the leaves is green, not glaucous, and the 
papillae are quite low domes. The flowers have a minute 
calyx without membranous expansions, the corolla is funnel- 
shaped unspotted and without blotches, the stamens are 
puberulous, and the truncate glandular setose ovary has a style 
glandular-setose in its lower third. Sifting the evidence here 
leads to much the same conclusion as was arrived at in the 
case of Rh. dimidiatum. If hybridisation by Rh. habrotrichum 
has taken place in nature, Rh. dimitrum is more likely than 
Rh. neriiflorum to have been the other parent. For purposes 
of comparison the tabular statement presented here, of differ- 
entiating characters of the suggested parents and their hybrid 
progeny, may be of use :— 
* diyoos, chariot-board—in allusion to the form of the calyx. 
