268 WILSON EXPEDITION TO CHINA 



sun 



diam 



oribus et magis succulentis. 



Western Szech'uan: Mupin,woodlands, alt. 2400-2700 m., Octo- 

 ber 1910 (No. 4215; tree 5-8 m. tall, fruit russet-green). 



This variety differs from the type chiefly in its smaller softer fruit and in the more 

 cuneate short-stalked leaves; in all other characters it agrees with the type, par- 

 ticularly in the peculiar conical thickening of the base of the connate styles, as it 

 appears on the fruit. 



Sorbus aronioides Rehder, n. sp. 



Frutex v. arbor, 4-12-metralis; ramuli ab initio fere glabri, annotini 

 fusco-grisei v. purpureo-fusci, sparse lenticellis parvis instructi; gem- 

 mae ovatae, acutiusculae, glabrae, pauci-perulatae. Folia decidua, 

 matura chartacea, breviter petiolata, elliptica v, elliptico-obovata v. 

 ellip tic o -oblong a, acuminata, basi sensim attenuata v. interdum satis 

 late cuneata, inaequaliter minute serrata, 6-12 cm. longa et 2.5-5 cm. 

 lata, supra glabra, ad costam plerumque glandulis sparsis obsita, luteo- 

 viridia, subtus paullo pallidiora, initio ad costam nervosque densius, 

 in facie sparsissime araneoso-lanuginosa, mox glabra, nervis utrinsecus 

 7-10 leviter curvatis ante marginem in venulas dissolutis; petioli 0.5-1 

 cm. longi, lamina decurrente plus minusve marginati, glabri. Corymbi 

 multiflori, satis densi, 3.5-5 cm. diam., glabri; pedicelli 2-5 mm. longi 

 ut calyx extus glaberrimi; sepala orbiculari-ovata, rotundata, margine 

 villoso-ciliata, ceterum glabra; petala irregulariter ovalia, circiter 4 

 mm. longa, breviter unguiculata, alba; stamina circiter 20, inaequalia, 

 longiora petalis subaequilonga, antheris late ovalibus fuscis; discus 

 cupulif ormis : ovarium totum inferum, carpellis undique connatis; 

 styli 2-3, rarius 4, ad medium usque connati, glabri, staminibus mani- 

 feste breviores, circiter 3.5 mm. longi. Fructus ovoideus, 9-11 mm. 

 longus, 8-9 mm. diam., apice cicatrice calycis decidui medio umbilicata 

 notatus, in sicco ruber, laevis; semina immatura obovoidea, compressa, 

 castanea. 



Western Szech'uan: Wa-shan, thickets, alt. 2300-3000 m., 

 June 1908 (No. 2993, type); southeast of Sungpan, thickets, alt. 

 2300-2600 m., August 1910 (No. 4632); Mt. Omei, June 1904 (Veitch 

 Exped, No. 4867). 



This species is most closely related to *Sf. Keissleri Rehder, which differs chiefly 

 in the villose inflorescence, the subglobose fruits, the stouter and shorter petioles, 

 and in the broader, more obovate and more coarsely crenate-serrate leaves. 



