1 886-8 7-] Notes on some Nezu and Rare British Plants. 55 



X.— NOTES ON SOME NEW AND BABE 



BBITISH PLANTS. 



By Mr SYMINGTON GRIEVE, President. 



{Read Feb. 23, 1887.) 



I AM indebted to Arthur Bennett, Esq., F.L.S., Croydon, for 

 kindly sending me some of the following plants from his 

 herbarium, and also for identifying one or two which were 

 collected by myself during a visit to the island of Eum in 

 July 1884. As all the plants are exceedingly interesting, it is 

 my intention to hand them over to the keeper of the herbarium 

 at the Eoyal Botanic Gar 1 en of this city for preservation. 



Potamogeton prselongus Wulf, from the island of Eum. This 

 plant has been recorded in most of the eastern counties of Eng- 

 land and Scotland, from Essex to Caithness. On the western 

 seaboard it appears to be a rare plant, and has hitherto only been 

 recorded from Westmoreland and Kirkcudbright. 



Carex flava var. Gauda of Gay, from the island of Eura. 

 Although Mr Bennett is not quite certain about the identi- 

 fication of this plant, owing to the immature state of the fruit, 

 still he has little doubt regarding it, after comparing it with 

 specimens in the herbarium at Kew. If this plant is correctly 

 named, it is the first record of it in Scotland, and it has only 

 been once recorded in South Britain, where it was many years 

 ago collected upon Snowdon. In any case, the plant in question 

 is a remarkable form of Carex flava, and as none of its varieties 

 have previously been recorded in the North Ebudes, it is at 

 least a new record for Watsonian County 104. 



Cerastium arcticum Lange, var. Edmonstonii Beeby, grows 

 on Serpentine Hills, Unst, Shetland. This seems to be a var- 

 iety of Cerastium latifolium L,, var. nigrcscens, of our Floras, 

 and which appears as yet to have been only found in Britain 

 in the Shetland Islands. From a paper contributed about a 

 year ago to the ' Scottish Naturalist ' by Mr A. Bennett, it 

 would appear that the Cerastium arctiaom of Dr Lange was 

 not thought to be the same as Cerastium latifoliimi L., var. 

 nigrescens. It appears to have been supposed that Cerastium 

 arcticum Lange, which was found in Greenland and Iceland, 

 might be found as far south as the Faroes. It is exceedingly 



