FLORA OF THE EAST RIDING OF YORKSHIRE. 1 93 



1575. Damasonium stellatum. Pers., 13. 



(Star-fruit). 

 Native, Eng. , 2. June. 



Very rare. Seen frequently in the 'seventies by the late 

 Mr. E. A. Peak and Mr. T. Dennis, near Stoneferry, Hull. 

 Not seen of late in this station, but the pond and dyke still 

 exist, and probably also the plant. 



1576. Butomus umbellatus. Linn., 60. 



(Flowering Rush). 



Native, Eng-., i, 2, 5, 6, 7. J^^il}' ^^• 



Still very common both in Holderriess and Derwentland, 

 making a handsome show when in flower. Derwent at Kirk- 

 ham (B.) ; near Beverley and Cottingham (R.T.) ; Keyingham 

 and other drains of Holderness. Growing wild within the 

 borough of Hull, 1898. Many of the old localities of G. 

 Norman and others, however, have the plant no longer. 



NAIADACEiE. 



1577. Triglocliin palustre. Linn., no. 



(Arrow-grass). 



Native, Brit., 1-7. July 



Frequent in wet, grassy places and on edges of ponds. 

 Hedon, 1898, and widely distributed elsewhere. 



1578. T. maritimum. Linn., 79. 



Native, Brit., i, 2, 4. Summer. 



Very common on the Humber shores, with Plantago 

 inurltima, Arnteria maritima, Glaux, ^c. 



1580, Potamogreton natans. Linn., loo. 



(Pond-weed). 



Native, Brit., 1-7. June, IV. 



Common in stagnant ponds and sluggish dykes in all the 

 districts. 



L 



