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: Stipulaein 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. Infiores- 

 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-metraHs, trunco 20-30 cm. diam.; rami ad 5 mm. diam., 

 cinerei; gemmae (mense JuHo) 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 cm. 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 palhde cano-viridia glabra, nervis utrinsecus circiter 

 15 reticuloque supra baud subtus sat prominulis pallidis, subchartacea; 

 epidermis utrinque irregulariter ac pro parte reticulato-striata epapil- 

 losa cellularum limitibus absconditis. Inflorescentiae nunc ramulum 

 elongatum nunc ramulos laterales abbreviatos circiter 1.5 cm. longos 

 terminantes, 9-11 cm. latae, 8-9 cm. longae, laxissimae, pauciflorae, 

 planae v. subconvexae, glabrae v. prope flores parcissime tenerrime 

 villosae; cupula 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 medium- 

 sized leaflets, and by a remarkably loose inflorescence. 



