ERICACEAE. — RHODODENDRON 515 



November 1908 (No. 1329); Shih-ch'uan Hsien, on cliffs in full sun, 

 alt. 1000-1300 m., August 1910 (No. 4726). 



A pretty species allied to R. micranthum Turczaninow, which has rather diflerent, 

 much more lepidote foliage, smaller, differently shaped flowers, a very small calyx, 

 a pistil not exceeding the stamens in length and slender, elongate capsules. 

 Our material is in ripe fruit with a few old flowers. The great length of the pistil 

 is most remarkable. This new species occurs on scrub-clad rocky slopes where it 

 is fully exposed to the sun. 



Sect. 3. Rhodorastrum Maxim. 



Flowers from terminal and axillary buds usually crowded at the end of the 

 branches; corolla mostly funnelform, pink or yellow; style and stamens exserted. 

 Leaves sparingly lepidote, or glabrous above, 2-8 cm. long. 



Rhododendron Davidsonianum Rehder & Wilson, n. sp.^ 

 Frutex 1-3-metralis; ramuli sparse lepidoti, saepe initio glauces- 

 centes; gemmae ovoideae, acutiusculae, perulis ovatis obtusis v. 

 apiculatis ciliatis dorso lepidotis. Folia chartacea v. tenuiter coriacea, 

 elliptica v. oblonga, rarius lanceolata, acuta, rarius breviter acumi- 

 nata, apiculata, basi cuneata, 2.5-6 cm. longa et 1-2 cm. lata, margine 

 leviter recurvata, supra laete viridia, nitentia, sparsissime lepidota, 

 subtus glaucescentia squamulis fulvescentibus nitidulis non contiguis 

 dense conspersa, nervis indistinctis, costa media supra leviter im- 

 pressa interdum puberula subtus elevata; petioli glabri, circiter 

 5 mm. longi. Flores in umbellis 1-3 terminalibus et axillaribus in 

 apice ramulorura congestis plurifloris, bracteis caducis; pedicelli 

 sparse v. sparsissime lepidoti, 1-1.5 cm. longi; calyx minutus, lobis 

 rotundatis lepidotis saepe sparse ciliatis; corolla campanulato-in- 

 fundibuliformis, 2.5-3 cm. longa ac lata, rosea, glabra, ad medium 

 5-loba, tubo circiter 1.5 longo e basi sensim ampliato intus glabro, 

 lobis ovato-ellipticis circiter 1.5 longis et 8-10 mm. latis rotundatis; 

 stamina paullo exserta, filamentis filiformibus ad basim villosis et 

 complanatis, antheris oblongis circiter 2.5 mm. longis ochraceis; stylus 

 stamina superans, 2.8-3.5 cm. longus, glabcr, stigmate applanato 

 purpureo; ovarium 4-5 mm. longum, dense Icpidotum, basi et apice 

 pilosum. Capsula cylindrica, 10-12 mm. longa, 3-4 mm. lata, sul- 

 cata, sparse lepidota; semina flavo-brunnea, ovoidea, acuta, circiter 

 1 cm. longa. 



^ Named for Dr. W. Henry Davidson, of the Friends Foreign Mission, at 

 Chengtu Fu, western Szech'uan, in grateful recognition of the important services 

 which he rendered to me after my serious accident in the early autumn of 1910. 



E. H.W. 



