674 



mens is thus described : " Cromford Moor, near Matlocli, Derbyshire, 

 July 24, 1843.— J. Hardy." 



Alyssum calycinum. I am also happy to be able to add another to 

 the known localities for Alyssum calycinum. It was found (for the 

 first time in this county) last summer, by Miss Carr, of Foulsham, in 

 a field at Twyford, near that place, in some plenty. I possess speci- 

 mens from the locality. 



Junciis diffusus. During the present summer I have visited 

 Hunstanton, the locality where Mr. James Backhouse, Jun., states 

 that he found a Juncus, which he supposed might turn out J. diffu- 

 sus. I found the plants in the spot he describes (Phytol. i. 1140), 

 but could find only a few, which differed from J. glaucus in possess- 

 ing solid instead of cellular pith, and on submitting some of these to 

 Mr. Babiugton, he pronounced them J. glaucus, and stated that Mr. 

 Backhouse's plant proves to be the same. It may be worthy of 

 notice that the solid pith will not alone serve to distinguish the two 

 plants, as some of the specimens of J. glaucus had perfectly solid 

 pith. J. diffusus has been found in Hertfordshire by Mr. Coleman. 



Wm. L. Notcutt. 



Falienhain, October 2, 1846. 



On the Specific difference of Glyceria plicata and G.Jluitans. 

 By Thomas Moore, Esq. 



I PERCEIVE that at p. 484 of the ' Phytologist,' where mention is 

 made of Glyceria plicata, there is some implied doubt as to its dis- 

 tinctness from G. fluitans. It may therefore be intei-esting to state 

 that continued observation of the two plants, both in a wild and culti- 

 vated state, serves only to confirm my original opinion of their dis- 

 tinctness. As far as I have observed, G. plicata may ahvays be 

 distinguished from G. fluitans in a growing state, by its broad, blunt- 

 ish, glaucous leaves, which are so obviously different from those of 

 the other plant, as to make it somewhat singular that they could, by 

 any possibility, have been confounded with each other. The shorter 

 and differently formed outer paleae in G. plicata, are also constant 

 characters, by which all the plants I have observed might readily be 

 distinguished. The purple anthers in the one, and the yellow (or 

 pale buff) anthers in the other, are also constant characters, as well 

 as their difference in size and form. 



It may be useful to quote Mr. Babington's characters for these two 



