FLORA OF THE EAST RIDING OF YORKSHIRE. 173 



1368. Euphorbia Cyparissias. Linn. 

 (Cypress Spurge). 

 •"^IJen. June, IV. 



"One mile from Hornsea on the road to Hull" (B.). 

 It is often planted in gardens.* 



1371- E. Peplus. Linn., 105. 

 (Garden Spurge). 

 Colonist, Brit., 1-7. Summer and Autumn. 



Very common on waste places near cultivation. 



1372- E. exigua. Linn., 83. 

 (Dwarf Spurge). 



Colonist, Eng., 1-7. August. 



Like the last. 



1375- Mercurialis perennis. Limi., 107. 



(Dog's Mercury). 

 Native, Brit., 1-7. April, IV. • 



Common in copses and thick hedgerows. 



1376. M. annua. Linn., 42. 

 Alien. Autumn. 



Occasionally near the docks, Hull. Mr. J. W. Boult.* 



Ricinus communis. 



(Castor Oil). 

 Alien. 



Docks, and near oil mills, Hull. 



URTICACE^. 



1377- Ulmus montana. Stokes., 98. 



(Wych Elm). 

 Native, Brit., 1-7. March, III. 



In hedges. Common. 



