ERICACExVE. — RHODODENDKON 537 



glabris; corolla S-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, rotimdati et apice leviter cmarginati; 

 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. pauUo 

 superans, glabcr 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. Monheigii 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 tomento.se ovary, 

 the shorter style and stamens and by the pubescent pedicels. R. (jyninanthum 

 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 suborbicularibus latioribus quam longis leviter emarginatis; stamina 10, 

 inclusa, 1-2 cm. longa, filamentis complanatis basi sparsissime pilosis, antheris 

 purpureis; ovarium conicum, 5 mm. longum dense tomento rufo obtectum; stylus 

 leviter curvatus, 1.5-2 cm. longus, glabrous, stigmate capitato. Capsula matura 

 desideratur. 



Yunnan : Tse-kou, valley of upper Mekong river, T. Monbeig (No. 3). 



This 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). 



