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. strwmosus. 
251. Elecampane. Naturalized in old fields and along roadsides. 
Compass-plants, Silphium* of several species, especially S. terebim 
thinaceum, S. laciniatum, S. perfoliatum. 
Sacaline, Polygonum Sachalinense. 
Japanese knotweed, Polygonum cuspidatum. 
Bocconia, Bocconia cordata. 
Wild wormwood, Artemisia Stelleriana * and others. 
