534 WILSON EXPEDITION TO CHINA 



This species is closely related to R. Przewalskii Maximowicz, but may be dis- 

 tinguished from that species by its longer and narrower fruit, larger seeds and 

 the gray tomentum of the young branches; the petioles, pedicels and calyx 

 also are sparsely hairy. Both species are alpine and are found growing together 

 in the neighborhood of Tachien-lu. 



Rhododendron Przewalskii Maximowicz in Bull. Acad. Sci. St. 

 Petershourg, XXIII. 350 (1877); in Mel. Biol. IX. 771 (1877).— 

 Hemsley in Jour. Linn. Soc. XXVI. 29 (1889). — Bean in Flora & 

 Sylva, III. 164 (1905). — Schneider, III. Handb. Lauhholzk. II. 485, 

 fig. 321 d (1909). — Hemsley & Wilson in Kew Bull. Misc. Inform. 

 1910, 108. 



Rhododendron kialense Franchet in Jour, de Bot. IX. 392 (1895). 



Western Szech'uan : west and near Wen-ch'uan Hsien, uplands, 

 alt. 3000-3600 m., July 1908 (No. 34331 bush 1.5-3 m. tall, flowers 

 white, spotted); Tachien-lu, Ta-p'ao-shan, moorlands, alt. 4300- 

 5000 m., July 7, 1908 (No. 3434; bush 1-2 m. tall, flowers white); 

 Tachien-lu, uplands, alt. 4300-4600 m., June 1908 (No. 3435; bush, 

 1-3 m. tall, flowers white); same locality, alt. 3600-4500 m., October 

 1910 (Nos. 4231, 4243; bushes 65 cm.-3 m. tall); same locality, alt. 

 3600-4600 m., June and October 1904 (Veitch Exped. Nos. 3968, 

 3957). 



This is the most alpine of the broad-leaved species found in western Szech'uan 

 where it is extremely abundant above the timber-line. The flowers vary in color 

 from white to rose-pink and are commonly spotted. Maximowicz describes the 

 stamens as villose and Franchet in his R. kialense as glabrous. Both forms are 

 represented in the specimens before us and gradually merge into one another. 

 The flowers and leaves are identical although the leaves vary considerably in size 

 and shape. No. 3957 has broadly ovate leaves, floccosely tomentose below, a 

 rosy-pink corolla and stout fruit covered with purple bloom. 



Rhododendron ochraceum Rehder & Wilson, n. sp. 



Frutex 3-metralis; ramuli hornotini dense pubescentes, pilis glan- 

 duliferis interspersis, annotini glabrescentes; gemmae perulis extus 

 tomentosis longe acuminatis exterioribus in appendicem elongatum 

 linearem elongatis (semper ?) . Folia tenuiter coriacea, oblanceolata, 

 subito breviter acuminata, basi late cuneata v. rotundata, margine 

 leviter revoluta, 6-9 cm. longa et 1.5-2.5 lata, supra initio pilis fas- 

 ciculatis caducis conspersa, mox glabra, laete viridia, opaca, minute 

 elevato-reticulata, subtus dense tomento ochraceo floccoso vestita, 

 costa media supra impressa subtus elevata, nervis lateralibus obso- 

 letis; petioli graciles, 1-2 cm. longi, sparse pubescentes et glanduloso- 



