546 WILSON EXPEDITION TO CHINA 



Subgen. III. AZALEA Planch. 



Leaves never lepidote, usually pubescent or setosely hairy, sometimes glabrous, 

 usually deciduous, rarely persistent. Ovary usually densely setose, never lepidote ; 

 corolla 5-lobed, stamens 5-10. 



Sect. 1. Chionastrum Franch. 



Flowers from axillary buds crowded at the end of the branches; corolla funnel- 

 form with a long tube; stamens 10, exserted; ovary glabrous or hairy. Fruit 

 cyUndric. Leaves glabrous, persistent. 



Rhododendron stamineum Franchet in Bull. Soc. Bot. France, 

 XXXIII. 236 (1886). — Hemsley in Jour. Linn. Soc. XXVI. 29 

 (1889). — Hemsley & Wilson in Kew Bull. Misc. Inform. X. 1910, 116. 



Rhododendron pittosporaefoUum Hemsley in Jour. Linn. Soc. XXVI . 29 (1889) . — 



Diels in Bot. Jahrb. XXIX. 515 (1900). — Bean in Flora & Sylva, III. 164 



(1905). 

 Rhododendron aucuhaefolium Hemsley in Jour. Linn. Soc. XXVI. 19 (1889), 



quoad flores; folia ad Daphniphyllum macropodum pertinent. — Bean in 



Flora & Sylva, III. 162 (1905). 



Western Hupeh: Hsing-shan Hsien, woods, alt. 1300-1600 m., 

 May and November 1907 (No. 567; bush 3-6 m. tall, flowers 

 white, spotted yellow, fragrant, the lobes of the corolla reflexed); 

 Chien-shi Hsien, June 1900 (Veitch Exped. No. 758) ; without precise 

 locality, A. Henry (Nos. 5787, 6432, 4031). Western Szech'uan: 

 woodlands, Wa-shan, alt. 1600-1800 m., June 1908 (No. 3470; bush 

 5-8 m. tall, flowers blush); Mt. Omei, woodlands, alt. 1600-2000 m., 

 October 1910 (No. 4268; bush 2.5-3 m. tall); same locality, May 1904 

 (Veitch Exped. No. 5140), A. von Rosthorn (No. 430). 



Although nowhere really common this is a widely distributed species, and is gen- 

 erally found in rocky, shady ravines. The very long exserted stamens readily 

 distinguish it from its near relatives. 



Sect. 2. AzALEASTRUM Plauch. 



Flowers from axillary buds hke those of the preceding section; corolla rotate; 

 stamens 5-10, shorter than the corolla. Leaves persistent or deciduous, glabrous. 



Rhododendron ovatum Planchon in Rev. Hort. 1854, 43. — 

 Maximowicz in Mem. Acad. Sci. St. Petershourg, ser. 7, XVI. No. IX. 

 45 (1870). — Hemsley in Jour. Linn. Soc. XXVI. 28 (1889).— 

 Hemsley & Wilson in Kew Bull. Misc. Inform. 1910, 120. 



