480 THE NATURAL HISTORY 



Scrophularia aquatica (Water Figwort). 

 Scrophularia Scorodonia (Balm-leaved Figwort). 

 Nasturtium officinale (Common Water-cress). 

 Hypericum quadrangulum (Square St. John's-wort). 

 H. elodes (Marsh St. John's-wort). 

 Bidens cernua (Nodding Bur-marigold). 

 Eupatorium cannabinum (Hemp Agrimony), found 



also by the side of the Hollow. 

 Senecio aquaticus (Marsh Ragwort). 

 Pulicaria dysenterica (Common Flea-bane). 



In Ponds and Pools we may collect : 



Lycopus Europceus (Water Horehound, Gipsywort). 



Lemna trisulca (Ivy-leaved Duckweed). 



L. minor (Lesser Duckweed). 



Iris Pseudacorus (Yellow Iris, Water-flag, Flower-de- 

 luce). 



Potamogeton rufescens (Long-leaved Floating Pond- 

 weed). 



P. crispum (Curled Pond-weed). 



P. perfoliatum (Perfoliate Pond-weed). 



Myosotis palustris (Great Water Scorpion-grass, Forget- 

 me-not). 



Alisma Plantago (Great Water Plantain). 



Polygonum amphibium (Amphibius Persicaria). 



Mentha hirsuta (Hairy Mint). 



Typha latifolia (Great Cat's-tail, Reed-mace). 



Sparganium ramosum (Branched Bur-reed). 



6". simplex (Unbranched Bur-reed). 



Downs, Heaths and similar Wastes may be success- 

 fully explored for : 



Moenchia erecta (Upright Mcenchia, Least Stitchwort). 

 Campanula rotundifolia (Round-leaved or Common 



Bell-flower). 



Phyteuma orbiculare (Round-headed Rampion). 

 Atropa Belladonna (Deadly Night-shade). 



