56 WILSON EXPEDITION TO CHINA 



sericei (in No. 2116*''' 2-6 mm. longi, tomentelli). Amenta 9 fiorifera 

 pedunculo vix 3-5 mm. longo sericeo foliola minima normalia 2-3 

 gerente suffulta, 2-3 cm. longa, circiter 5 mm. crassa, rhachi sericea, 

 densiflora; ovaria sessilia v. subsessilia, glabra, ovato-oblonga, stylo 

 mediocri apice subbifido stigmatibus bifidis brevibus sublongiore co- 

 ronata, glandula una ventralis, oblonga, bracteis subrotundis brunnes- 

 centibus intiis glabris extus et margine satis longe sericeis fere aequi- 

 longa (in No. 2116^'^ amenta pedunculo brevi saepissime defoliolato, 

 bracteis glabris). 



Western Hupeh: Fang Hsien, alt. 2300-2600 m., May 16, 1909 

 (No. 2ii6, type; 9 ; bush 2.4-3.6 m., much branched); same place, 

 side of streams, alt. 1700-2300 m.. May 16, 1909 (No. 21 16''''; bush 

 1.8-2.4 m.; 9 flowers a little older). 



This species comes from the same place as S. rhoophila Schneider, but it differs 

 from that species in the distinct styles and the silky bracts. No. 2116^" looks 

 somewhat intermediate with its glabrous bracts and distinct styles. 1 do not 

 know if No. 2116^'^ really belongs to *S. polyclona, but it differs also from S. rhoo- 

 phila Schneider. Both these species may be distinguished from the forms of S. 

 longiflora Andersson or *S. cathayana Diels by their leafless or shorter peduncles 

 and by their different geographical distribution. It is extremely difficult to inter- 

 pret the Chinese Willows of this section, and I think it better to separate at present 

 the different forms rather than to unite them without sufficient reason. As 

 I have stated above, central China has an uncommonly rich development of the 

 genus Salix, and anybody who has been earnestly interested in the study of this 

 genus knows the difficulty in obtaining sufficient material of the flowers of the two 

 sexes and of mature leaves of both. Mr. Wilson, however, has been more success- 

 ful in securing complete material than other collectors of Chinese Willows. 



The specific name is derived from no\vK\a>vos, with many branches. 



Salix mictotricha Schneider, n. sp. 



Frutex 4.5-6 m. altus, valde ramosus; ramuli initio laxe sericeo- 

 villosuli, annotini glabri v. subglabri, purpureo-brunnei v. in sicco 

 nigrescentes, vetustiores cinerascentes. Folia (juvenilia) elliptica v. 

 late elliptica, basi rotunda, apice rotunda usque subacuta, supra ut 

 videtur laete viridia, initio sparse sericea v. sericeo-tomentella, mox 

 glabra v. tantum costa puberula, subtus cinerea v. glauca, initio pilis 

 longis sericeis obtecta v. tantum costa villosula, mox glabrescentia, 

 margine integra, minora 1.5-2 cm. longa et 0.9-1.5 cm. lata, majora 

 (plantae d") ad 2.3:1.2 cm. v. (plantae 9) ad 2.6:1.7 cm. magna; 

 petioli sericei v. villosuli, 3-5 mm. longi, graciles. Amenta d' sub- 

 sessilia, basi foliolis minimis sericeis 1-2 suffulta, 2 cm. longa, vix 4 

 mm. crassa, densiflora, rhachi sericea; flores diandri, filamentis liberis 

 basi pilosis quam bracteae 2>^plo longioribus, antheris ovalibus flavis; 



