196 
capsules were mature (May 17); third, when the leaves were 
mature (July 13). Specimens of the buds and branches were also i 
taken in March, 1896, 
The preliminary comparison of material from each individual, 
and our conclusions, together with a complete set of our plants, 
were ready to be sent to Mr. Bebb for his final revision, when the 
sad news of his death reached us. 
‘The results of our work fulfil Mr. Bebb’s prophecy and even 
more than fulfil it. A whole season’s study of No. 20 confirms 
his provisional diagnosis of it. 
There is a specimen from a pistillate plant in the Cornell Uni- 
versity Herbarium named by Mr. Bebb, Salix candida X S. petto- 
Jaris, and on the label is printed, “Originally from Hascoll’s 
Swamp, near Flint, Michigan, where it was discovered by Daniel 
Clarke, M. D., in 1872, the locality soon after being obliterated. 
Should it be deemed advisable hereafter to treat supposed hybrids 
as quasi-species after the manner of Andersson, Kerner and 
others, I very much wish that this beautiful Willow should be 
called S. Clarket, to commemorate the name of a botanist who has 
done more than anyone else to give an impetus to the study of 
hybrid willows in this country.” With the specimens are draw- 
ings and detailed notes which, so far as the writers know, Mr. 
Bebb never published. 
Our plant differs decidedly from Mr. Bebb’s in general appear- 
ance. ‘The leaves are larger, much more densely tomentose below, 
and lighter green above ; the capsules are much more densely to- 
mentose at maturity (there is no young material with Mr. Bebb’s 
specimen) and the tomentum is creamy white, whereas in his 
specimen it is silky and gray. The young catkins in our speci- 
men have that glistening white appearance so characteristic of 5. 
petiolaris. A superficial comparison of his plant with ours would 
lead one to believe them quite different, but closer examination 
shows that they agree quite closely as to essential characters. The 
winter buds, which are of much importance in diagnosing willows, 
indicate too that this is intermediate between S. candida and S. 
petiolaris. 
It is a significant indication of the accuracy of Mr. Bebb’s _ 
judgment regarding willows that what he anticipated for this speci- __ 
men in style and capsule characters should prove so true. 
