1915-16.] BOTANICAL SOCIETY OF EDINBURGH 87 



on the upper surface, by the more glaucous tint of the 

 under surface of the leaf where the epidermal papillae are 

 longer, by the flower pedicels nearly twice as long, by its 

 small calyx, which is not hirsute, and by the much longer 

 exserted style. Of its relations to Rh. onekongense, Franch., 

 I have written under that species. -^ 



Rhododendron xanthinuon, Balf. f. et W. W. Sm.^ Sp. 

 nov. 

 Small shrub about 1"5 meters high, with short twisted 

 branches and leaves deciduous after one season. Branch- 

 lets of the year clad with twisted long interlocking hairs 

 and also sparingly lepidote ; one-year-old branches grey 

 and without hairs or scales. Leaf buds small oblong ovoid, 

 the bud scales all shortly ciliate at the apex and the inner 

 lepidote on the back. Leaves at most 3 cm. long, appearing 

 after the flowers ; blade thin papery, at most about 2"7 cm. 

 long and 7 mm. wide, oblong or narrowly obovate obtuse 

 or somewhat rounded or even acute at the apex with a flat 



^ Rhododendron xanthiniim, Balf. f. et, W. W. Sni. — Fruticulus ad 

 15 dm. altus tortuose breviterque ramosus. Raiimli hornotini pilis 

 lanatis dense vestiti sparsimque lepidoti annotini glabri grisei. Alabastra 

 parva oblongo-ovoidea cataphyllis bruiineis exterioribiis subrotmidatis 

 apice breviter ciliatis interioribus oblongis obtusis circ. 6 mm. longis 

 extus plus minusve lepidotis apice ciliatis. Folia post floras evoluta ad 

 3 cm. longa ; lamina tenuis cliartacea circ. 2 "7 cm. longa 7 mm. lata 

 oblonga vel anguste obovata apice obtusa nunc subrotundata nunc 

 subacuta margine plana basi cuneata supra sordide viridis subtus 

 pallidior utrinque juventute pilis lanatis fuscis squamulisque super- 

 ficialibus peltatis integro-fimbriatis lutescentibus discontiguis subtus 

 densius obtecta maturitate supra pilis squamulisque paucis sparsa nunc 

 omnino glabra infra semper lepidota seel costa media basi excepta fere 

 epilosa venarum reticulo purpurascente; petiolus ad 4 mm. longus dense 

 lanatus et plus minusve lepidotus. Flores in umbellam terminaleni 

 circ. 3-floram dispositi praecoces ; bracteae non visae ; pedicelli circ. 

 1 "3 cm. longi lanati et lepidoti superne m calycem lanato-barbatum 

 expansi. Calyx pilis lanatis occultus lobis 5 circ. 2 mm. longis. 

 Corolla lutea circ. 2 cm. longa anguste campanulata extus pilis lanatis 

 plus minusve obtecta et lepidota, tubo circ. 1 cm. longo intus pubescente, 

 limbi arapliati lobis 5 rotundatis circ. 1 cm. diam. integris pateutibus. 

 Stamina 10 corolla breviora filamentis posterioribus medium versus 

 albo-villosis os corollinum oppletentibus anterioribus basin versus plus 

 minusve pubescentibus. Ovarium ovoideum circ. 3 mm. longum 

 lepidotum et pilis lanatis ad apicem praecipue plus minusve obtectum; 

 stylus circ. 8 mm. longus stamina subaequans declinatus glaber; stigma 

 lobulatum. 



Species yunnanensis Rh. trichoclado, Francli. persimilis ramulis 

 brevibus subintricatis hand virgatis, foliis angustioribus, calyce lanato 

 barbato, corolla extus pilis lanatis obtecta diftert. 



