HIPPOCASTANACEAE. — AESCULUS 499 



ovoideis, 1.3 mm. longis; pistillum in floribus masculis ad stylum caly- 

 cem vix v. paullo supcrantem glabrescentem disco lobulato insidentem 

 reductum; in flore fertili ovarium ovoideum, 4-5 mm. longum, rufo- 

 tomentosum; stylus apice glabro excepto dense breviter villosus, cum 

 ovario circiter 3 cm. longus. Capsula 3-valvis, inermis, verruculosa, 

 flavo-brunnea, inaequaliter ovoidea, vix pyriformis, 3-4 cm. longa, 

 mucronata, plerumque monosperma, valvis tenuibus, fragilibus, in 

 sicco 1.5-2 mm. crassis; semen subglobosum, 3-3.5 cm. diam. casta- 

 neum, hilo magno albido suborbiculari 2.5-3 cm. diam. circiter tertiam 

 partem seminis occupante. 



Western Szech'uan: Hsin-wen-ping, Min valley, alt. 1000 m., 

 June 1, 1908 (No. 200, type); Nanch'uan, A. von Rosthorn (ex Diels). 

 Western Hupeh : north and south of Ichang, woods, alt. 1300-1800 

 m., September 1907; Hsing-shan Hsien, woods, alt. 1300-2000 m., May 

 25, June and September 1907; Fang Hsien, woods, alt. 1600-2000 m., 

 October 1907; Changlo Hsien, woods, alt. 1300-2000 m.. May and 

 June 1907; Changyang Hsien, woods, alt. 1300-1600 m., April 6, 1907 

 (all under No. 200) ; without locahty, June 1900 (Veitch Exped. No. 

 1303). Eastern Szech'uan: south Wushan, yl, //enry (Nos. 5892, 

 7203, 7203=^); " Ou-kia-ki, Ou-tan-scian, North Siho," C. Silvestri 

 (Nos. 1388, 1389, 3097, ex Pampanini). 



This beautiful tree has been usually confused with A . chinensis Bunge, which differs 

 in its nearly glabrous short-petiolulate leaves sparingly pilose only on the veins 

 below and cuneate at the base, in the smaller flowers and chiefly in the subglobosc 

 slightly depressed fruit truncate and slightly impressed at the apex, with thick 

 walls, in the dry fruit 3-4 mm. thick, and in the smaller seeds with the hilum oc- 

 cupying one half or more than one half of the surface of the seed. It is also closely 

 allied to A. indica Colebrooke, which differs in its larger flowers with much broader 

 petals, in the inflorescence with less crowded ascending ramifications and in the 

 cuneate glabrous leaflets; A. punduana WaUich, which more resembles our species 

 in its inflorescence and flowers, is easily distinguished by its very short-stalked 

 cuneate and glabrous subcoriaceous and indistinctly serrulate leaflets. 



Pictures of A. Wilsonii will be found under Nos. 96 and 343 of the collection of 

 Wilson's photographs and also in his Vegetation of Western China, Nos. 114 and 115. 



Though I have not seen the specimens collected by A. von Rosthorn in Szech'uan 

 and by Silvestri in Hupeh, I have no doubt that they belong to A. Wilsonii, 

 while the specimen collected by Piasezki in Shensi is probably the true A. chinensis 

 to which Maximowicz referred it. 



As a complete description of A. chinensis has not been published, a description 

 of this species based on the material in the herbarium of the Arnold Arboretum 

 may be given here: 



Aesculus chinensis Bunge in M6m. Sac. Etr. Acad. Sci. St. PHcrshourg, II. 84 

 {Enum. PL Chin. Bor. 10) (1S33). — Walpers, Rep. I. 423. — Hance in Jour. Bat. 

 VIII. 312 (1870). — Hemsley in Jour. Linn. Sac. XXIII. 139 (188G). — Maximo- 



