294 A GUIDE TO THE WILD FLOWERS 



903. Common Sunflower. Helianthus annuus. A rough, 

 coarse, stiff-haired annual 3-6, or even 10 ft. high. Leaves 

 generally alternate, the lower ones opposite, stalked, 3-veined, 

 broadly-oval, 8-20 in. long. Flowers yellow, the heads soli- 

 tary or rarely a few, at least 4 in. wide, and in cultivated 

 specimens, often a foot wide. As an escape from cultivation 

 in the east, but wild on prairies in the west. August. 



904. Woodland Sunflower. Helianthus divaricatus. A slen- 

 der, mostly unbranched, smooth-stemmed perennial, 2-6 ft. 

 high. Leaves all opposite, standing out rather straight, lance- 

 oval or lance-shaped, toothed, 3-veined, distinctly rough above 

 and hairy beneath. Flowers yellow, the heads often solitary 

 or a very few, long stalked. In dry woods, Maine to Florida 

 and westward. Very common. August. Fig. 904. 



905. Wild Sunflower. Helianthus decapetalus. Suggesting 

 No. 904, but the yellow flower heads in decided clusters, the 

 leaves alternate and opposite, and the leaf base merging into 

 a winged stalk. In moist places, Quebec to Georgia, west 

 to Michigan and Kentucky. August. 



906. Jerusalem Artichoke. Helianthus tuberosus. A stout 

 perennial with considerably thickened edible rootstocks. Stem 

 rough and hairy, 6-10 ft. high. Leaves opposite and alter- 

 nate, oval or oval-oblong, long-stalked, toothed, 23^-5 in. 

 long. Flowers yellow, the heads in long stalked clusters, and 

 about 3^ in. wide. In waste places, New Brunswick to 

 Georgia, and westward, mostly as an escape from cultiva- 

 tion. September. Fig. 906. Neither an artichoke nor from 

 Jerusalem. 



907. Giant Sunflower. Helianthus giganteus. The tallest 

 of our wild Sunflowers, often 10 ft. high or more, and the 

 stem rough. Leaves alternate or opposite, prevailingly lance- 

 shaped, essentially stalkless, 2^-5 in. long. Flowers as in 

 No. 906, but slightly smaller. In wet places, Maine and On- 

 tario to Florida, and westward. September. 



908. Heads exclusively of ray flowers; plants with a milky 

 juice. (Daisy Family concluded.) Nos. 909-925. 



