FLORA OF THE EAST RIDING OF YORKSHIRE. I07 



HALORAGE^. 



632. Hippuris vulgaris. Lhm., 90. 



(Mare's Tail). 



Native, Brit., i, 2, 5, 6, 7. June, I. 



Very common in all open drains of Holderness, Hornsea 

 Mere, &c. In the Derwent and at Londesboro' (B.). 

 Welham and Beck Mill stream, near Malton (M.B.S.). 



633. Myriophyllum verticillatum. Linn., 49. 



Native, Eng., i, 2, 6. June, IV. 



Uncommon, but at Marton near Button Constable,* 

 ditches near Beverley (R.T.), Leckonfield moat, "delphs" 

 near Staddlethorpe (C.W.). 



634. M. Spicatum. Linn., 78. 



(Milfoil). 



Native, Brit., i, 2, 5, 6, 7. June, I. 



In stagnant ponds, drains, and Dykes in Holderness, and 



near Selby (W.N.C.). Hornsea Mere (C.W.). Not so 



common as the following. 



635. M. alterniflorum, DC, 80. 



Native, Brit., i, 2. June, I. 



Kelsey gravel pits, near Keyingham.* Dykes near Hull, 

 "very common" (Y.N.U.). 



636. Callitriclie verna. Linn., 



(Water Starwort). 

 Native, Brit., i, 7. May, III. 



In stagnant shallow water of most dykes. 



637. O. stag-nalis. Scop., 93. 



(Mud Starwort). 

 Native, Brit., 1-7. June. 



The common form. 



