14. R. LEUCOSTACHYS. 121 



difference from the German figure is found in the very 

 decidedly leaf-pointed sepals of the Irish plant. Weihe and 

 Nees describe and figure the sepals as acute, not even 

 possessing the long linear point usually to be found in li. 

 leucostachys. I am not inclined to give much weight to this 

 difference, having sometimes had reason to doubt the perfect 

 accuracy of the Iluhi Germanici, in minute i)oints, and 

 strongly incline to the opinion that Dr Moore's plant is the 

 B. j)uhescens (W. & N.). The identity of that species with 

 our li. leucostachys is rendered less certain by the discovery 

 of this Irish plant. Unfortunately only one specimen of it, 

 gathered some years since, has been preserved, and therefore 

 we do not possess sufficient evidence to determine its identity 

 with either of the plants. 



In 1848 or 1849 I received from Mr Lees an imperfect 

 specimen of a plant gathered by him on the top of Horsenton 

 Hill in Middlesex, which he supposed to be a form of R. 

 tomentosus. It is not safe to attempt the determination of a 

 Ruhus without a good series of specimens, and therefore I 

 can give no decided opinion upon this plant; but, as far as I 

 am able to judge, it is a state of R. leucostachys. It has 

 green felt beneath its leaves, stellate down but very little 

 hair on its stem, more slender oonieal prickles springing 

 from broader depressed bases than ordinary R. Uucostachys. 

 The leaves are coarsely and doubly dentate like those of the 

 authentic R. leucostachys of Borrer. An accidental aciculus 

 or seta may be found on the stem and the panicle bears an 

 abundance of short inconspicuous setae. 



The specimen of R. leucostachys (Lindl.), as obtained 

 from the authentic bush in the Horticultural Society's 

 Garden by Borrer, is R. leucostachys (i vestitus in its coai-scr 

 state. The specimens so named by Lindley for Leighton are 

 7^. Lindleiatius. 



I possess two specimens of R. vestitus, derived from the 



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