t Euphorbia 



heUoscopia Sun Spurge 



t ,, amygdaloides Wood 



,, peplus Peiiy 



t .. exigua Dwarf ,, 



,, esula Leafy 

 tMcrcuriahs perennis Dog's Mercury 



t, annua Annual Mercury 



Gravel-pit beyond Hertford. 



Rare. Ware Park Brickfield (?). 

 Callitrichineae. The Callitriche Family. 



fCallitriche aquatica Callitriche 

 Ceratophyllum 



demersum Hornwort 



Urticaceae. 



fUrtica urens Small Nettle 



t ,, dioica Common Nettle 



fParietaria officinalis Wall Pellitory 



(P. diffusa) 

 tHumulus lupulus Common Hop 



Fl. H. recognises four species. 



The Mimram ; the Lea (Fl.H.). 

 The Nettle Family. 



Near Ware Bridge (G. ] 



fUlmus montana 

 ,, campestris 



Ulmaceae. The Elm Family. 

 Wych Elm 

 Common Elm 



Amentaceae. 

 Alder 

 Common Birch 



fAlnus glutinosa 

 tBetula alba 



(B. verrucosa) 

 tCarpinus betulus Hornbeam 



Corylus avellana Hazel 

 fFagus silvatica Beech 



Quercus robur British Oak 



t ,, var. pedunculata 

 t ,, var. sessiflora 



Seed not fertile. 

 The Catkin Family. 



Very common. 



Parks. 



