HABITATS OF PLANTS 



Knot weed (Polygonum aviculare). Page 27. A weed in waste 



places and gardens. 

 Erect Knotweed (P. erectum). Page 27. 

 Common Smartweed. Water Pepper (P. hydropiper). Page 



27. 

 Persicaria (P. pennsylvanicum) . Page 251. 

 Prince's Feather (P. orientate). Page 252. An escape. 

 Black Bindweed (P. Convolvulus). Page 28. A common weed 



in waste and cultivated ground. 

 Climbing False Buckwheat (P. scandens). Page 383. In gar- 

 dens, a weed. 

 Lady's Thumb (P. Persicaria). Page 252. A weed in rather 



damp places. 

 Pigweed. Lamb's Quarters (Chenopodium album). Page 28. 



A common, well-known weed. 

 Russian Thistle (Salsola Kali, var. tenuifolia). Page 29. 



Recently introduced, but rapidly gaining ground and difficult 



to eradicate. 

 Green Amaranth. Pigweed (Amaranthus retroflexus). Page 



29. Common. 

 Tumbleweed (A. graecizans) . Page 30. 

 Thorny Amaranth (A. spinosus). Page 29. 

 Corn Spurrey (Spergula arvensis). Page 62. A weed infest- 

 ing grain fields. 

 Common Chickweed (Stellaria media). Page 64. A weed, but 



not aggressive, and good for the chickens. 

 Long-leaved Stitch wort (S. longifolia). Page 65. 

 Common Mouse-ear Chickweed (Cerastium vulgatum). Page 65. 

 Corn Cockle (Agrostemma Githago). Page 254. Found in fields 



of grain. More troublesome in Europe than with us. 

 Bouncing Bet (Saponaria officinalis). Page 256. Probably an 



escape. 

 Purslane (Portulaca oleracea). Page 162. A weed in cultivated 



grounds. 

 Common Buttercup (Ranunculus bulbosus). Page 166. 

 Tall Buttercup (R. acris). Page 166. 

 Celandine (Chelidonium majus). Page 168. Imported. A 



weed found near old garden walls, in damp soil. 

 White Poppy (Papaver somniferum). Page 75. An escape. 

 Climbing Fumitory (Adlumia fungosa). Page 451. Sometimes 



cultivated, and escaping. 

 Pale Corydalis (Corydalis sempervirens) . Page 258. Springing 



up in recent clearings. 

 Golden Corydalis (C. aurea). Page 169. The members of this 

 genus are pretty vines with weak stems, found in recent clearings 

 or cultivated ground. They can hardly be ranked as weeds. 



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