1920] SCHNEIDER, NOTES ON AMERICAN WILLOWS. VII 149 



Folia etiam novella glaberrlma vel citissime glabra; ramuli novelli sparse pilosl 

 vel ab initio glabri; amenta saepc praecocia, sessilia vel subsessilia, vel 

 bracteae plus minusve oblongae et aplce obtusiores vel rotundatae. 

 Amenta sessilia vel subsessilia, etiam fructifera densiflora et vix ad 4.5:1.5 

 cm. magna; fructus maturi 5-7 (-7.5) mm. longi pedicello vix ultra 1,25 

 mm. longo excluso; styli circiter 1.5 mm. longi; folia normalia superzora 

 (surculorumque excepta) vix ultra 8:2.6 cm. magna, superne ut videtur 



semper stomatibus satis numerosis instructa 3. S^monftcola, 



Amenta fere semper pedunculo brevi foliolato sufFulta, fructifera pleraque 

 satis laxiflora, saepissime ultra 5 cm. longa ad 8:2 vel 12:2.5 cm. magna; 

 fructus maturi 9-10 mm. longi, pedicello 1.5-2.5 (3) mm. longo excluso; 

 styli 0.5 ad 1.25 mm. longi; folia superiora normalia saepissime longiora vel 

 latiora, circiter ad 9:3.8 vel 10:6 cm. magna, epidermide estomatifera. 



4. S. glmicophylloides et var. 

 Folia matura normalia subtus concoloria, viridescentia (in S. orestera interdum 



pallidiora sed satis anguste lanceolata, ovaria et filamenta basi pilosa), 

 superne in epidermide stomatibus numerosis instructa. 

 Ovaria filamentaque glabra. 



Folia circumcirca dense vel densissime glanduloso- (saepe fimbriato-) serrulata 

 vel serrata, normalia (superiora basi fere semper) plus minusve cordata; 

 bracteae florum fere semper fuscae; pedicelli saepissime vix ad 1 mm. longi. 



5. S. adenojphylla , 



Folia minimis exceptis integerrima vel saltem versus basim plus minusve 



brevissime glanduloso-denticulata subserratave, basi obtusa ad rotundata, 



rarius subcordata; bracteae florum satis flavo-brunneae; pedicelli saepissime 



1-1.8 mm. longi « . . . . 6. S. commutata, 



Ovaria et filamenta (basi) pilosa. 



Folia normalia superiora elliptica, elliptico-lanceolata vel elliptico-oblonga^ 

 ad 5.5:1.5 vel (surculorum excepta) 6.5:2.1 cm. magna, plus minusve inte- 

 gerrima vel distanter et saepe obscure glanduloso-denticulata, sed inferiora 

 minora satis dense glanduloso-denticulata: fructus maturi 6-6.5 (rarius 

 ultra) longi, pedicello vix ultra 0.5-1 mm. longo excluso; styli 1-1.5 mm. 

 longi 7. S. Eastwoodiae. 



Folia normalia superiora anguste lanceolata ad late oblanceolata, 4:0.8 ad 

 7,5:2 cm. (surculorum excepta) magna, integerrima vel distanter et sparse 

 glanduloso-denticulata subserratave, etiam minora satis obscure glanduloso- 

 denticulata, adulta subtus glabrescentia subpallidiora vel paullo glauces- 

 centia; fructus maturi 7-8.5 mm, longi pedicello ad 1.5 mm. longo excluso; 

 styli 0.8-1.2 mm. long! 8. S, orestera. 



ENUMERATIO SPECIERUM 



1, S, Chamissonis Andersson. — See Bot. Gaz. lxvii. 63 (1919), As I 

 have mentioned in a foot-note, I did not know this species well enough when 

 I wrote my third note and referred it to a group of " species sectionis 

 incertae." After having seen good male material I think it best to put it 

 in this section, but S. Chamissonis Is easily distinguished from all the other 

 species by its creeping habit and the fine and close serration of the leaves, 

 the teeth being acute and not distinctly glandular as in S. adenophylla. 

 Salix Chamissonis may prove to be more closely related to certain willows 

 of northern Asia with which I am not yet well enough acquainted. I have 

 seen the following specimens of this very rare species. 



Alaska. Port Clarence, July 12, 1899, Trelease & Saunders (No. 3427, fr. im.; 



