THE ORNAMENTAL PLANTS — PERENNIALS 263 

 Elecampane, Inula Helenium (Fig. 251). 



Wild sunflowers, Helianthus * of different species, especially H. orygalis, 

 H. giganteus, H. grosse-serratus, H. strumosus. 



251. Elecampane. Naturalized in old fields and along roadsides. 



Compass-plants, Silphiuin^ of several species, especially S. terebiu' 



thinaceum, S. laciniatum, S. perfoliatum. 

 Sacaline, Polygonum Sachalinense. 

 Japanese knotweed, Polygonum cuspidafum. 

 Bocconia, B Oceania cor data. 



Wild wormwood, Artendsia Stelleriana^ and others. 



