Salix barclayi Andersson
Annotated by G.W. Argus, March 2010.

Yukon Territory: Whitehorse, Rotary Park, Yukon River. Elev. 638 m
60.71655°, -135.04659°
Along the river bank with Salix glauca, S. alaxensis, and Alnus incana. Growing 2.5 m tall. Female, some shrubs starting to produce seed. Collected for genetic research. Argus noted Nov. 2007 and revised to S. barclayi best fit but... Revised by G.W. Argus Mar. 2010 to S. barclayi X richardsonii ferruginous hairs are present with prominant stipules. The characters that “definitely” exclude S. pseudomonticola are: pistillate flowering branchlet length and stigma lobe length. You can see from the table that stipule length in the two species is virtually the same. The presence of a few ferruginous hairs on the adaxial surface of some of the leaves, however, complicates the picture. These could well come from S. pseudomonticola or S. richardsonii. I have seen (and collected) a lot of specimens in the Alaska Range that I suspect are the cross S. barclayi x S. richardsonii, but it is very difficult to prove hybridization without doubt. Leaf adax surface with ferruginous hairs. Does not fit S. barclayii. Leaf L/W 1.5. Pistillate flowering branchlet 8-9.4 mm. No fit S. psmo or S. richardsonii. Stipe 1.2-1.4 mm. Style 0.6 mm. Stigma lobes 0.55. Common. Previously identified as Salix pseudomonticola. Previously identified by B.A. Bennett, June 2007. X duplicates (UBC; K; CAN).

B.A. Bennett 07-0024, June 15, 2007
BABY, Accession: BABY-06979