266 WILSON EXPEDITION TO CHINA 



This includes besides those enumerated above the following species: P. ussu- 

 riensis Maximowicz, P. ovoidea Rehder, P. Lindleyi Rehder, P. Bretschneideri 

 Rehder, P. phaeocarpa Rehder, P. betulifolia Bunge, P. kolupana Schneider and 

 P. Koehnei Schneider. 



SORBUS L} 



Sorbus pallescens Rehder, n. sp. 



Arbor tenuis 7-metralis; ramuli fusco-purpurei, sparse lenticellati, 

 initio ut videtur lanuginosi, autumno glabri; gemmae pauci-perulatae, 

 oblongo-ovatae, acuminatae, apice villosulo except© glabrae. Folia 

 decidua, elliptico-ovata v. elliptica, rarius elliptico-obovata, basi ro- 

 tundata v. late cuneata, acuta v. breviter acuminata, 4-10 cm. longa 

 et 2-5 cm. lata, irregulariter v. dupliciter denticulato-serrata, denti- 

 culis saepe ad glandulam reductis, maturitate supra glabra, subtus to- 

 mento lanuginoso adpresso albido-cinereo nervis'flavescentibus leviter 

 tantum villosis exceptis dense obtecta, nervis utrinsecus 10-12 fere 

 rectis in dentes exeuntibus subtus colore flavescente conspicuis; petioli 

 0.5-1.2 cm. longi, flavescentes, maturitate sparse lanuginosi v. fere 

 glabri. Inflorescentia fructifera parva, tota fructibus inclusis circiter 

 1.5 cm. alta, sessilis, sparse lanuginosa v. fere glabra, fructibus 1-4; 

 pedicelli breves, 2-3 mm. longi; fructus subglobosus, circiter 6 mm. 

 diam., albidus partim rubro suffusus, basi et apice sparse lanuginosus, 

 calyce persistente sepalis recurvis triangularibus acutiusculis intus 

 glabris extus pubescentibus coronatus, bilocularis; styli duo, basi lanu- 

 ginosi, infra saltem connati (pars inferior persistens tantum visa); 

 semina orbiculari-obovoidea, compressa, circiter 4 mm. longa, castanea. 



Western Szech'uan: west of Tachien-lu, thickets, alt. 3000 m., 

 October 1908 (No. 1255). 



This species is most closely related to S. cuspidata Hedlund, which is easily dis- 

 tinguished by the larger leaves white-tomentose beneath, by the larger inflorescence 

 and by the larger lenticellate 3-5-celled fruit. It may also be compared with 

 Sorbus Aria Crantz, which differs in the broader distinctly lobulate leaves more 

 densely white-tomentose beneath including the veins and petioles, in the much 

 larger many-flowered inflorescence, longer sepals, and in the larger fruit with the 

 persistent sepals incurved. 



Sorbus megalocarpa Rehder, n. spec. 



Frutex robustus 5-8-metralis, interdum epiphyticus in variis arbori- 

 bus veteribus; ramuli crassi, initio, ut videtur, sparse lanuginosi, de- 

 mum fusco-purpurei, glabri, nitiduli, lenticellis albidis plerumque oblon- 



1 For subgen. Aucuparia, see vol. I. 457-483. 



