I08 FLORA OF THE EAST RIDING OF YORKSHIRE. 



639. Callitriclie hamulata. Knetz, 



(Linear-leaved Starwort). 



Native, Brit., 1-7, June. 



As common, or commoner than the above-named species, 

 and gets most luxuriant in flowing- water. 



640, C, obtusang-ula. Le Gall, 27. 



Native, Eng., i. 



Very rare. Grimston in Holderness (G.W.). 



LYTHRARIE^. 



643, PepliS Portula. Linn., 98. 



(Water Purslane). 



Native, Brit., 6, 7. July, IV. 



Rare. Wet places in Houghton Woods (J.J.M., 1892),. 

 and on Skipwith Common, 1883 (H.J.W.). 



644. Lythrum Salicaria. Linn., 92. 



(Purple Loose-strife). 



Native, Eng., i, 2, 5, 6, 7. Aug., IL 



Plentiful in Holderness and Derwentland near dykes, and 



in marshy places near R. Hull ; very beautiful when in flower 



en masse.* 



ONAGRARIE^. 



646. Epilobium angustifolium. Linn., 96. 



(Rose bay Willow Herb). 



Native, Brit., 3, 4, 6, 7. Aug., \. 



Houghton Woods ; near South Cave.* Yorkdale and 

 Sledmere Woods (M.B.S.). Elloughton Vale (C.W.). Skip- 

 with Common.* 



