SLATER : FLORA OF RIPON. 1 63 



1139. E. Esula. Leafy-branched spurge. Common in many 

 of the older gardens near Ripon, and sometimes 

 occurring as an escape in the neighbourhood. 



1 143. E. Peplus. Petty spurge. Cultivated ground, abundant. 



1 144. E. exigua. Dwarf spurge. Cornfields, common. 

 1146. Mercurialis perennis. Mercury. Woods, abundant. 



1 149. Parietaria diffusa. Pellitory. Rocks and old walls. 



Very abundant at Fountains Abbey, and on the cliffs 

 near Knaresborough. 



1 150. Urtica dioica. Nettle. Waste ground, abundant. 



1152. U. urens. Small nettle. Waste ground, but generally 



found near a wall or building. 



1153. Humulus Lupulus. Hop. Hedges, but doubtfully 



indigenous. Near Bridge Hewick ; Fountains Abbey 

 (on rocks) ; Newby district (Lees, 1. c). 



1154. Ulmus suberosa. Cork-barked elm. Woods and 



hedges, not common. 



1 155. U. montana. Wych elm. Woods and hedgerows, the 



commoner species. 



1 156. Quercus robur. Oak. Woods, common. 



1 157. Castanea vulgaris. Chestnut. Parks and woods, not 



indigenous. 



1 158. Fagus sylvatica. Beech. Woods, common. 



1 159. Cory I us avellana. Hazel. Woods, abundant. 



1 161. Alnus glutinosa. Alder. Wet places, and by streams, 



common. 



1162. Betula alba. Birch. Woods, not common. There is 



a considerable grove of birch at North Stainley, and it 



is common at Leckby Carr. 

 1165. Populus alba. White poplar. Woods, preferring a 



moist situation. Not indigenous. 

 1 168. P. nigra. Black poplar. Woods, not indigenous. 

 1 170. Salix fragilis. Brittle willow. Damp places, common. 



