266 WILSON EXPEDITION TO CHINA 



This includes besides those enumerated above the following species: P. U8su- 

 rieiisis Maximowicz, P. ovoidea Rehder, P. Lindkyi Rehder, P. Breischneideri 

 Relider, P. phaeocarpa Rehder, P. hetulifolia Bunge, P. kolupana Schneider and 

 P. Koehnei Schneider. 



SORBUS L.i 



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 excepto glabrae. Folia 

 decidua, elliptico-ovata v. elliptica, rarius elliptieo-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 fiavescente 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 saltern connati (pars inferior persistens tantum visa); 

 semina orb iculari-ob ovoidea, compressa, circiter 4 mm. longa, castanea. 



Western Szech'uan: west of Tacliien-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 

 Sorhus 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-fiowered 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- 



I 



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



