Populus fremontii S. Watson var. fremontii - UTF 



[Populus fremontii S. Watson subsp. fremontii] - KTZ, W&W 



{Populus X intercLirrens S. Goodrich & S. L. Welsh} - UT3 

 {NS - reported for CO by UT3, specimens not seen} 



Populus X jackii Sarg. - GPF, KTZ, W&W 

 [Populus balsamifera X P. deltoides] - KTZ 



# Populus nigra L. - GPF, KTZ, W&W 



Populus tremuloides Michx. - GPF, HDH, KTZ, SF!. UTF, W&W, E/W 



Salix 



[See Argus07 for distribution maps with caveats regarding taxonomic recognition] 

 (Identification sources: 



* Salix alba L. var. vitellina (L.) Stokes - GPF. W&W, E/W 



[Salix alba L.] - , Argus07, KTZ 

 [Salix alba L. var. vitellina (L.) Koch] - SF! 

 Salix amygdaloides Andersson - Argus07, Dorn01,GPF, KTZ, SF!, UTF, W&W, E/W 



[Salix amygdaloides Andersson forma amydgaloides] - HDH 



[Salix amygdaloides Andersson forma angustissima E. C. Sm.] - HDH 



[ Salix aimgdaloides Andersson forma pilosciuscula C. K. Schneider] - HDH 



Salix arctica Pall. var. petraea (Andersson) Bebb - DornOl, E/W 



[Salix anglorum Cham. var. antiplasta C. K. Schneider] - HDH 



[Salix arctica Pall, subsp. petraea (Andersson) A. Love. D. Love, & B. M. Kapoor] -SF!, W&W 



[Salix arctica Pall. var. petraea Andersson] - UTF 



[Salix petrophila Rydb.j - Argus07, KTZ. W&W 1 

 Salix arizonica Doni - Argus07 



[NS - absent from previous checklists] 



# Salix babylonica L. - SF!, W&W, E/W 



[Salix X pendulina Wender.] - KTZ 



[Salix fragilis X ?S. sepulcralis] - KTZ 



[Salix X sepulcralis Simonk.] - KTZ 



[Salix alba X ?S. pendulina] - KTZ 

 { Salix barclayi Anderss.; - KTZ, W&W 1 err. rep. 

 Salix bebbiana Sarg. - Argus07, DornOl, KTZ, SF!. UTF, W&W, E/W 



[Salix bebbiana Sarg. var. bebbiana] - GPF, HDH, RMC 



[Salix bebbiana Sargent var. perrostrata (Rydb.) C. K. Schneid.] - GPF, HDH 

 Salix boothii Dorn - Argus07, DornOl, KTZ, SF!. UTF, W&W, E/W 



[Salix pseudocordala (Andersson) Rydb.] - HDH 



Salix brachycarpa Nutt. var. brachycarpa - HDH, KTZ, UTF, E/W 



[Salix brachycarpa Nutt.] - DornOl, SF!, W&W 



[Salix brachycarpa Nutt. subsp. brachycarpa] - Dorn97 



[Salix brachycarpa Nutt. var. antimima Raup] - HDH 



[Salix brachycarpa Nutt. var. sansonii C. R. Ball] - HDH 



| Salix glauca I .. var. glabrescens (Andersson) C. K. Schneid.] - HDH 



(Salix pseudolapponum Seem.] - HDH 

 Salix calcicola Fernald & Wiegand var. glandulosior B. Boivin- Argus07 



[Salix calcicola Fernald & Wiegand] - Snow07b, KTZ, SFE, Dorn97, E/W 



[Salix lanala L. subsp. calcicola (Wiegand) Mullen] - SFW 



[Salix lanala L. subsp. calcicola (fernald & Wiegand) I In lien] - W&W 



Salix Candida Fliiegge ex Willd. - Argus07, DornOl, KTZ, E/W 

 [Salix Candida Fliiegge] - GPF, HDH, SF!, W&W 



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