SALICACEAE. 



Determined by Camillo Schneider. 



POPULUS L. 



Populus Wilsonii Schneider, n. sp. 



Arbor late pyramidalis, 5-24 m. alta, trunco circuitu 0.5-1.5 m., 

 primo aspectu Idesiae polycarpae non absimilis; ramuli crassi, anno- 

 tini cylindrici, purpurascentes v. olivaceo-brunnei, saepe subglauci, 

 glabri; vetustiores cinereo-brunnei, deinde cinerascentes; gemmae 

 satis magnae, ut videtur obtuse ovatae, rubro- v. flavo-brunneae, 

 glabrae sed (an semper?) leviter viscosae, perulis glabris margine 

 ciliatis obtectae. Folia papyracea, initio rubescentia, deinde supra 

 obscure glauco-viridia, ut videtur semper glabra, subtus discoloria, ci- 

 nereo-viridia, opaca, initio floccoso-tomentosa, cite subglabra, ad 

 costam et nervos primarios sparse pubescentia v. pleraque tantum 

 basi in axillis nervorum barbata utrinque laxe reticulata, late ovata v. 

 subrotunda v. late ovato-oblonga, basi plus minusve cordata v. 

 rotundo-truncata, apice obtusa, margine crenato-dentata dentibus 

 3-5 mm. distantibus distincte callosis, minora circiter 8 cm. longa et 

 7 cm. lata, majora ad 18 cm. longa at ad 15 cm. lata v. interdum ad 

 20 cm. longa et ad 16 cm. lata; glandulae ima basi foliorum duae (v. 

 interdum nullae), subrotundae, leviter excavatae; petioli purpuras- 

 centes, supra leviter caniculati, (4-) 6-11 cm. longi. Inflorescentiae 

 tantum femineae cognitae, iis P. lasiocarpae simillimae, pubescentes, 

 juveniles c. 7 cm., fructiferae ad 15 cm. longae; flores breviter pedi- 

 cellati. Fructus subglabri (an semper?), ovati. 



Western Hupeh: Hsing-shan Hsien, side of streams, very rare, 

 alt. 1800 m., May 20 and August 1907 (No. 706", type; pyramidal 

 bushy tree 8 m. tall, 0.5 m. girth) ; Changyang Hsien, alt. 1300-2000 

 m., May 1907 (No. 706^; tree 20-25 m. tall, girth 1.5 m.) ; Fang Hsien, 

 woodlands, alt. 1800-2600 m., June 16, 1910 (No. 4450; tree 5-15 m. 

 tall, girth 0.75-1.25 m., usually very bushy; sterile); north and south 

 of Ichang, high mountains, 1901 (Veitch Exped. No. 384, in part; 

 tree 7-13 m. tall; flowering branchlets). Western Szech'uan: 



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