44 



1919] SCHNEIDER, NOTES ON AMERICAN WILLOWS. V 17 



the type was collected by Dr. Lyall " in Insula Vancouver." Of this species 

 a photograph and fragments of the type and a co-type from Herb. G. are 

 before me. It represents, in my opinion, only a form of S. lasiandra with 



ramulis puberulis," and if we keep it as a variety as Bebb did we have to 

 include the hairy forms of CaUfornia. It may be that we can separate the 

 typical southern lasiandra from the northern variety, and that both varie- 

 ties produce a hairy form, in which case the southern form should have a 

 new name. I have tried to distinguish these two varieties by the difference 

 in the length of the pedicels which seem to be usually shorter in the southern 

 type, and by other characters, but as far as I can see there is hardly a char- 

 acter sufficiently constant to be found. Even the typical S. lasiandra often 

 shows a partly rusty pubescence on the very young shoots and leaves, but 

 some very tomentose specimens of the pubescent form from California look 

 rather different. On the other hand we find on specimens from the Colum- 

 bia in Oregon to the Yukon Territory all degrees of glabrousness to a well- 

 marked tomentum on the shoots or on one-year-old branchlets, the presence 

 of rufous hairs on the young leaves being sometimes rather conspicuous, 

 while on other material the pubescence is entirely grayish. We need a 

 series of well-collected specimens from each region to decide the taxonomic 

 value of the different characters. 



The typical S. lasiandra is found from southern California to the Colum- 

 bia in Oregon, in New Mexico near Santa Fe (in a form which I have men- 

 tioned above) and in certain forms in southwestern Colorado (Montezuma, 

 San Miguel and Gunnison Counties) which hitherto have been partly mis- 

 taken for S. amygdaloides and S. laevigata. In Nevada and Sierra Coun- 

 ties of California and in western Nevada it seems to grow together with 

 var. caudata, and there are certain specimens before me which I am actu- 

 ally^ at a loss to refer to either variety. Towards the north S. lasiandra 

 (in its glabrous form which as I said may possibly be separated under the 

 varietal name macrophylla) occurs from Oregon (where I have seen it from 

 the following counties: Josephine, Douglas, Marion, Multnomah, Wasco, 

 Columbia), Washington (counties: W. Klickitat, Pierce, King, Chehalis, 

 Clallam) to British Columbia (coast region, but also in Kootenay), and it 

 has been collected in northwestern Alberta (Peace River Landing, J. M. 

 Macoun, No. 21266; O.) and in the Yukon Territory (vicinity of Dawson). 

 The hairy form may be separated at present as 



6b. S. lasiandra var. lancifolia Bebb in Watson, Bot. Cal. ii. 84 (1879), 

 probabiliter tantum ex parte. — Macoun, Cat. Can. PI. 1.450 (1883), pro 

 parte; ii. 358 (1890). — S. lancifolia Andersson in Svensk. Vetensk. Akad. 

 Handl. VI. 34, t. 2, fig. 23 (Monog. Salic.) (1867); in De Candolle, Prodr. 

 xvi.'J 206 (1868). — A typo praecipue differt ramulis hornotinis dense 

 saqiius etiam annotinis biennilusque plus minusve vel partim pubescentia 

 villosa grisea vel fusca vestitis, foliis initio (saltem parvis ad basim pe- 

 dunculorum) subtus plus minusve distincte ferrugineo-sericeis. 



In Andersson 's type the pedicels of the fruits are somewhat pilose and 

 measure from 1 to 1.5 mm. I refer to this variety the following specimens: 



