THE CAYUGA FLORA. 91 



foliage altogether of a gray or silver-green aspect, and does not 

 blacken in drying. Stipules narrowly lanceolate or almost seta- 

 ceous, somewhat glandular-denticulate when young. Catkins — 

 pistillate, 2-3 cm. long, (or 3-4 cm. when mature, ) slender compact, 

 erect, resembling 5". incana, Schrauk ; abundantly leafy bracted at 

 the base, bracts inclining to be abruptly acute, mucrouate or ob- 

 tuse, even in the mature state. Ovaries stalked, glabrous, lanceo- 

 late, style slender, stigmas deeply bifid, each branch with two, 

 rarely three, oblong lobes, scale oblong, 73 the length of the ovary, 

 smooth on the back but ciliate with numerous long white hairs, 

 whitish or purplish tipped when young, inclining to be acute, espe- 

 pecially in the lower part of the catkin. Mature seeds very few. 



S. incana, Schrauk., a willow from the Alps and Pyrenees, is in 

 cultivation on the grounds of B. G. Jayne ; also of J. D. Carpenter, 

 Buffalo St. Both trees are pistillate. It was clear by comparison, 

 that our hybrid was allied to 5". incana, and in spite of the presence 

 of occasional stipules I referred the former to the latter as an intro- 

 duced variety of it. Referring the plant to Mr. Bebb, as a final 

 authority, he replied that it was a hybrid, of somewhat surprising- 

 character. He says : "it cannot have been introduced. There is 

 nothing like it in the European Flora." " It is indeed clearly allied 

 to 5". incana and just as clearly not 6". incana. * * * The depar- 

 ture from 5". incana is wholly in the direction of American and not 

 European forms." He thinks it clearly a hybrid between 5". incana, 

 Schrank, on one hand, and probably S. cordata, Muhl., on the other, 

 (or possibly 5". petiolaris, Sm.;) although, in the absence of experi- 

 ment, he does not wish to pronounce finally. He found pistils of S. in- 

 cana, (which I collected here, 1881, ) to have been fertilized, probably 

 by some American willow, as staminate 5". incana is not cultivated 

 in this region. Comparing the hybrid with the parent it differs 

 from 6". incana ; in branchlets tough near the base ; leaves and leafy 

 bracts more abundant at flowering time, shorter more tapering and 

 less woolly beneath when mature, sharply glandular serrate and 

 margins scarcely revolute. (S. incana has long, linear, slightly den- 

 ticulate leaves, woolly beneath with margins revolute ;) stipules 

 present, ovary somewhat longer-stalked ; style longer and slen- 

 derer ; stigmas 4 or 5 (instead of 2 or 3) and shorter lobed ; scale 

 elliptic and inclined to be acute (instead of truncate) ciliate with 

 longer, more abundant white hairs. (S. incana hybridizes freely 

 with Eur. Willows. (See And. in DC. Prod., XVI, (2) p. 302-305.) 

 It has no near relatives indigenous to the American continent. 



858. S. purpurea L,. Purple Willow. 



Introduced and frequent along the lake-shore. Apr. 20-May 10. 



Staminate plants occur near the light-hotise at the Inlet, at King's 

 Ferry, Aurora, Union Springs, on the Pearson estate by Neguaena 

 Cr. (formerly cultivated there,) near Mud Cr., and Beaver Cr. in 

 Dryden, and in Ulysses and Venice. Pistillate plants are in culti- 

 vation in Ithaca, village and cemetery. 



