DIAGNOSES SPECIERUM NOVARUM. 279 
paullo elevatis ; subtus cervina reticulata copiose discontigue lepi- 
dota intervallis squamarum diametrum superantibus, squamis in 
quoque quad. mm. circ. 4-5 dispositis ex umbone convexo rufes- 
cente et instita latiore membranacea incolorata aedificatis, costa 
media elevata erubescente lepidota, venis primariis paullo eleva- 
tis; petiolus 1 cm. longus vel ultra rubidus sulcatus ut ramuli 
vestitus. Flores in umbellas 5-floras solitarias et terminales vel 
2-3-fasciculatas dispositi; bracteae plus minusve sub anthesi 
persistentes exteriores crustaceae late ovatae dorso lepidotae 
breviter albo-ciliatae, interiores membranaceae obovatae spathu- 
latae truncatae dorso sericeae et lepidotae ad 1.5 cm. longae 6 
mm. latae ; bracteolae lineares circ. 1.5 cm. longae superne latiores 
pilosae et lepidotae apice barbatae; pedicelli circ. 1.5 cm. longi 
dense lepidoti. Calyx parvus cupuliiormis cire. 1.5 mm. longus 
extus dense lepidotus margine irregulariter indistincte lobatus. 
Corolla subzygomorpha infundibulitormi-campanulata ad 2.5 
cm. longa purpureo-rosea postice maculata intus glabra extus 
squamis flavidis et kermesinis copiose lepidota; tubus limbum 
ascendentem 5-lobum subaequans basi intensius colorata; lobi 
ovales. Stamina 10 inaequalia, longiora corollam subaequantia ~ 
breviora circ. 1.7 cm. longa; filamenta glabra nunc obscure puber- 
ula sed filamentum posticum dense puberulum. Discus puber- 
ulus. Gynaeceum circ. 3 cm. longum corollam superans ; ovar- 
ium circ. 4 mm. longum angustum conoideum truncatum paullo 
sulcatum dense lepidotum ; stylus glaber sub stigmate discoideo 
latiore lobulato dilatatus. Species Seriei Triflori, phyli Rh 
siderophylli. 
Eastern Yunnan. Prope Yunnansen. Secus viam. Bas 
Yunnan. Anne forma Rh. racemosae? Delavay. 4 Mart. 18or. 
S.E. Yunnan. In Imen district. Whitish to violet flowers. 
Henry 9110a. 
S.E. Yunnan. Dry wooded hills N. of Ten-Hsiong-fu vailey. 
Lat. 25° 6’ N. Alt. 6-7000 ft. Forrest No. 507. Feb. 1905. 
S.E. Yunnan. About Yunnanfu. Maire 2696 (Herb. Edin.) 
The fewer scales of the indumentum separate this from Rh. 
siderophyllum, Franch. Hemsley has written on the sheet from 
Paris now in Kew Herbarium the following flower analysis :— 
‘‘Stamens shorter than corolla. Filaments glabrous.’’ On the 
sheet of Henry’s collecting Hemsley has “‘pub. stam.’”’ This 
seems to be one of those forms in Rhododendron where there is 
this variation. In the Triflorum Series it often happens that the 
posterior short stamens are quite densely hairy, the anterior long 
ones only faintly hairy or with no hairs. In every one of the 
members of the Trichocladum Series there is this difference in 
the androecium on the anterior and posterior side respectively of 
the flower. The difference is only seen in flowers which are 
medianly zygomorphous, 
