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REVISION OF THE BRITISH WILLOWS. 361 



lowing information about Salix pentandra and S. cuspidata in 

 Shropshire. S. pentandra seems to be native, making usually a 

 shrub from about 7-10 feet high, but occasionally a tree of about 

 20 feet. 8. cuspidata (which also appears to be native) attains in 

 its best form a height of 25 feet or more ; but another form 

 (more pentandra-like) is only a shrub-like bush. Of the latter 

 I have seen only one plant (which belongs beyond doubt to 

 o. cuspidata) ; but bushes reported to be similar in appearance 

 grow at comparatively short intervals for twelve miles or more 

 along the Rea Brook. Whether these are all cuspidata or 

 whether, as is probable, some, or most of them, are pentandra, 

 requires investigation. 



Of the Shropshire plant I have seen the <j> only ; and appa- 

 rently the 6 has not yet been detected there. 



X Salix hexandra, EhrJi. (S. pentandra x 8. alba.) 



To this rare hybrid I am inclined to refer the following spe- 



cimens : 



Herbarium 



near Duddingston (Edinburgh) by J. Knapp in 1836, and referred 

 at one time to S. alba, and at another to S.fragilis. This seems 

 most Probably a hybrid between pentandra and alba, both of 

 which grow at Duddingston. 



Ihe leaves are too young, but, on the whole, are similar to 

 those of authentic specimens of 8. liexandra. They are at first 

 clothed with silky pubescence, but become quite glabrous. In 

 some cases the apex of the petiole is glandular, but not so glan- 



dular as in Wim 



(? 











peduncles, much resemble those of S. pentandra. The capsule is 

 m or e slender than in that species ; and the pedicel is longer than 

 rt is, as described, in S. liexandra ; but in a hybrid the length 

 would be subject to variation. The style, almost obsolete, and the 

 short spreading-erect stigmas are like those of 8. pentandra. 

 2. A bush found by me at Restenet, near Forfar, growing with 

 • pentandra and S. alba. Of this I have not yet seen flowers ; 



Un less to S. liexandra, I do not know where to refer it. 



Attention may here be called to another probable hybrid of S. 



Pentandra which I have found near Restenet, where that species 



ounds. Of this supposed hybrid I have seen leaves only. It 



somewhat the aspect of 8. decipiens ; but since S. triandra does 



' 80 * ar as I know, occur in that neighbourhood, it has probably 



Dr? C ^ nectiou wit h the latter species. The other parent may 



° aa ' '~ *• & phylidfolia. 













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