DIAGNOSES SPECIERUM Novartm. 247 
neam vix .5 mm. longam minute ciliatam et squamo-cinctam 
fingens. Corolla subcarnosula roseo-lavandulacea _ olivaceo- 
maculata ad 3.5 cm. longa zygomorpha; tubus basi intensius 
coloratus postice subventricosus extus squamulis parvulis albis 
basi sparsissime lepidotus intus glaber sursum in limbum am- 
plum expansus; lobi 5 ovales circ. 2 cm. longi 2 cm. lati: Stam- 
ina 10 inaequalia corollam subaequantia; filamenta deorsum 
dilatata supra basim brevem nudam ad faucem corollae puberula ; 
antherae spadiceae. Discus sub ovario dense puberulus. Gynae- 
ceum corollam multo superans; ovarium conoideum truncatum 
dense lepidotum; stylus glaber sub stigmate lobulato discoideo 
expansus. Capsula leviter curvata 2 cm. longa 4 mm. diam. 
brunnea lepidota ab apice 5-valvata. Semina minuta oblonga. 
Species Seriei Triflori. 
Western N.W. Yunnan. Mekong-Salween. Tzeku. Soulié 
No. 1012, (Rh. Augustinii, Hemsl. var. grandiflora, Franch.). 
Western N.W. Yunnan. Mekong-Salween divide. W. of 
Tzeku. Lat. 28° ro’ N. Alt. 1o-11,000 ft. Open situations 
on the margins of mixed forests. Forrest No. 689. Sept. 1904. 
(Rh. siderophyllum, Diels). 
. Tibet. Tsarong. Mekong-Salween divide. Doker-la. 
Lat. 28° 25’ N. Alt. 10-11,000 ft. In open thickets and pine 
forests.. Shrub of 4-8 ft. Flowers rose-lavender with olive 
green markings. Forrest No. 16,360. May 1018. 
Yunnan. Without precise locality. In fruit: Forrest No. 
17,456. Oct. 1918; Nos. 17,476? and 17,479. Nov. 1918. 
_ §.E. Tibet. Tsarong. Salween—Kiu-chiang divide. Lat. 28° 
40’ N. Long. 989 15’ E. Alt. 8-10,000 ft. Margins of forests 
and thickets. Shrub of 2-6 ft. Flowers soft lavender deepest 
at base. Forrest No. 18,903. July 1oro. 
Rhododendron chawchiense, Balf. f. et Farrer. 
_Arbor. Rami crassi annotini circ. 5 mm. diam. indumento 
albido vel rufo plus minusve pefsistente pilorum sebaceorum et 
glandularum parvarum tomentosim vestiti. Folia petiolata ad 
17 cm. longa; lamina tenuiter coriacea anguste oblonga vel 
oblongo-ovalis vel oblongo-lanceolata utrinque attenuata, ad 15.5 
cm. longa 3.5 cm. lata, apice acuta nunc rostratim acuta mucrone 
parvo terminata, margine cartilaginea plana vel paullo recurva, 
basi cuneata; supra atro-viridis opaca glabra sed indumenti 
juvenilis vestigiis notata, costa media rubida sulcata, venis pri- 
mariis utrinsecus circ. 20 paullo impressis; subtus pallidior 
griseo-viridis laevis, costa media erubescente. elevata  sparsim 
floceosa, venis primariis -paullo prominulis erubescentibus cuni 
venulis, magnitudinis subordinatae albido-floccosis, caeteroquin 
papillis epidermicis longis baculiformibus ad apicem lobulatis 
