COMPOSITE FAMILY 



duce no seeds that will grow; the style of the 

 pistil is undivided, which perhaps explains the 

 anomaly. 



BROOK SUNFLOWER. BUR MARIGOLD. 



BIDENS 



Bidens chrysanthemoides. Bidens livis 



Bidens from bis and dens meaning two-toothed, 

 in reference to the seed-vessels. 



Native. The annual Brook Sunflower in 

 great numbers along ditches and lowlands gives 

 the most brilliant yellow of the autumn. Massa- 

 chusetts to Ohio, south to South Carolina. 

 August-October. 



Ste77i. — Smooth, much branched, one to tvo feet 

 high. 



Leaves. — Three to eight inches long, opposite, lance- 

 olate; midrib prominent; serrate, acuminate at apex, 

 sessile, sometimes perfoliate. 



Flower-heads. — Numerous, borne on short, erect pe- 

 duncles; two to two and one-half inches across. Rays 

 eight to ten, neutral, broad, very showy, golden yellow, 

 oval to oblong, obtuse. Disk-florets, perfect, fertile, 

 yellowish or brownish. Involucre hemispherical; outer 

 bracts linear-oblong, pointed or spatulate, leafy, 



24 



