ERICACEAE. — RHODODENDRON 537 
glabris; corolla 5-loba, late turbinato-campanulata, basi leviter 5-gibbosa, 3.5-4 
cm. longa 4-4.5 cm. lata, glabra, pallida (colore ignoto); lobi 1-1.5 cm. longi, circiter 
duplo quam tubus longiores, inaequales, rotundati et apice leviter emarginati; 
stamina 10, inclusa, 1.5-3 cm. longa, filamentis complanatis basi sparse glandu- 
losis, antheris purpureis; ovarium cylindricum, 8-10 mm. longum, sparsissime 
glandulosum; stylus curvatus, 2.2-2.5 cm. longus, corollam aequans v. paullo 
superans, glaber v. in parte inferiore sparse puberulus stigmate simplice. Capsula 
matura non visa. 
Western Yunnan: Tse-kou, valley of upper Mekong river, T. Monbeig, 
(Nos. 16, type, 2). 
The nearest ally of R. Monbeigii is undoubtedly R. foveolatum Rehder & Wilson, 
which is distinguished by the peculiar foveolate tomentum of the leaves, the 
tomentose branchlets, smaller flowers, the shorter, rufously tomentose ovary, 
the shorter style and stamens and by the pubescent pedicels. R. gymnanthum 
Diels also seems related to this species, but is at once distinguished by the quite 
glabrous and green under surface of the leaves and by the distinctly racemose in- 
florescence with short pedicels. 
Rhododendron foveolatum Rehder & Wilson, n. sp. 
Frutex ramulis crassiusculis annotinis et biennibus albido-tomentosis. Folia 
tenuiter coriacea, oblongo-oblanceolata, basi sensim attenuata, apice acuta v. fere 
rotundata et mucronata, margine leviter reflexo, 9-10 cm. longa et 2-3 cm. lata, 
supra glabra, obscure viridia, leviter elevato-reticulata, subtus dense tomento 
cinereo foveolato-lanuginoso obtecta, costa supra impressa subtus elevata nervis 
utrinsecus 10-12 supra leviter impressis subtus leviter elevatis; petioli 1-1.5 cm. 
longi, crassi, adpresse cinereo-tomentosi. Flores 10-12, umbellato-racemosi; 
pedicelli crassiusculi tenuiter tomentosi; calyx brevissimus, cupularis, obsolete 
5-dentatus, puberulus; corolla 5-loba, late turbinato-campanulata, 3-3.5 cm. 
longa et lata, basi leviter 5-gibbosa, pallida (colore ignoto), maculata, lobis inaequali- 
bus Suborbieularibus latioribus quam longis leviter emarginatis; stamina 10, 
inclusa, 1-2 em. longa, filamentis complanatis basi sparsissime pilosis, antheris 
purpureis; ovarium conicum, 5 mm. longum dense tomento rufo obtectum; stylus 
leviter curvatus, 1.5-2 em. longus, glabrous, stigmate capitato. Capsula matura 
desideratur. 
Yunnan: Tse-kou, valley of upper Mekong river, T. Monbeig (No. 3). 
Species is related to R. Monbeigii Rehder & Wilson which has a different 
tomentum, larger flowers, an elongated, glabrescent ovary and glabrous branchlets. 
Group e. 
Leaves glabrous beneath. 
Rhododendron Souliei Franchet in Jour. de Bot. IX. 393 (1895).— 
Gard. Chron. ser. 3, XLV. 380, fig. 167, t. (1909).— Hemsley & Wilson 
in Kew Bull. Misc. Inform. 1910, 108. — Diels in Not. Bot. Gard. 
Edinburgh, V. 217 (Pl. Chin. Forrest.) (1912). 
Western Szech'uan: vicinity of Tachien-lu, upland, thickets and 
Woodlands, alt. 3000-3600 m., June and October 1908 (No. 1222; 
bush 2-3 m. tall, flowers rose-pink); same locality, October 1910 (No. 
4274; bush 1-2 m. tall); without precise locality, alt. 3300-3800 m., 
July and October 1903 (Veitch Exped. No. 3971). 
