466 WILSON EXPEDITION TO CHINA 
ber 1910 (No. 4155). Northern Shensi: “Ta-sce-tsuen,” Septem- 
ber 18, 1897, G. Giraldi (No. 5129). 
Giraldi’s plant which was referred by Schneider doubtfully to S. pekinensis 
Koehne is represented also only by fruiting specimens, and I am at present unable to 
distinguish it from Wilson's plants upon which the above description is based. 
As Giraldi's specimen differs slightly from the type the following should be added 
to the description: Stipulae in ramis sterilibus paucissimae persistentes, herbaceae 
5-8 mm. longae, paucidentatae; foliola dentibus paullo minoribus quam in typo, co- 
riacea; epidermis supra laevis, subtus parum papillosa reticulato-striata. Inflores- 
centiae 6-12 cm. latae 7-10 cm. longae; carpidia 4 v. 5, tota connata. 
It is rare that a species of Shensi occurs also in the provinces of Szech’uan or 
Hupeh. A picture of this tree will be found under No. 0332 of the collection of 
Wilson’s photographs. 
Sorbus laxiflora Koehne, n. sp. 
Arbor 8-12-metralis, trunco 20-30 cm. diam.; rami ad 5 mm. diam., 
cinerei; gemmae (mense Julio) 4 mm. longae, glabrae exceptis squa- 
marum marginibus tenerrime ciliatis. Stipulae siccae, parvae, lanceo- 
latae, caducae; folia cum petiolo 1.5-3.5 cm. longo 10-16 em. longa, 
(6-)7-juga; rhachis exalata v. apice angustissime alata, ad nodulos 
supra parce tenere rufo-villosa, ceterum glabra, interstitiis 1-1.3 cm. 
longis; foliola inde a pari tertio v. quarto deorsum decrescentia, 
sequentia aequalia v. suprema 2 paullo minora, basi hinc obtusa 
illinc subacuta, oblongo-elliptica, majora 2-4 cm. longa, 0.8-1.5 cm. 
lata, acuta v. breviter cuspidata, quarta v. tertia parte integra ceterum 
argute breviter serrata dentibus utrinsecus circiter 10-20 patulis v. 
superioribus subincurvis, supra glabra v. raro in costa pilis paucissimis 
conspersa, subtus pallide cano-viridia glabra, nervis utrinsecus circiter 
15 reticuloque supra haud subtus sat prominulis pallidis, subchartacea; 
epidermis utrinque irregulariter ac pro parte reticulato-striata epapil- 
losa cellularum limitibus absconditis. Inflorescentiae nune ramulum 
elongatum nune ramulos laterales abbreviatos circiter 1.5 em. longos 
terminantes, 9-11 cm. latae, 8-9 em. longae, laxissimae, pauciflorae, 
planae v. subconvexae, glabrae v. prope flores parcissime tenerrime 
villosae; eupula glaberrima, sepala apice sublanata; petala stamina- 
que ignota; carpidia 5, inde a placenta segregata, apice lanata, styli 
glabri. Fructus immaturi tantum suppetentes. 
Western Szech'uan: Ta-p'ao-shan, north-east of Tachien-lu, 
alt. 3000-3800 m., July 4, 1908 (No. 3008). 
This very peculiar species forms with the two following a special group dis- 
tinguished by its small stipules, medium-sized leaves with 4-7 pairs of m 
sized leaflets, and by a remarkably loose inflorescence. 
