Browse photos by Craig Althen:
Populus
Populus alba – 2 photos
Populus trichocarpa – 2 photos
Salix
Salix alba – 1 photo
Salix arctica – 6 photos
Salix bebbiana – 2 photos
Salix boothii – 5 photos
Salix drummondiana – 4 photos
Salix exigua – 6 photos
Salix farriae – 4 photos
Salix geyeriana – 1 photo
Salix nivalis – 1 photo
Salix scouleriana – 1 photo
Salix sitchensis – 3 photos