NO. 18] Convolvulus (Convolvulacece). 143 



(2) Field Dodder. C. arvensis, Bey. 



Flowers, scarcely one twelfth inch in length, five-parted, 

 in dense, rounded clusters. Corolla, with a short 

 and wide tube. Corolla-lobes, longer than the tube, 

 pointed, with the ends turned in. Calyx-lobes, blunt 

 and usually very broad. Scales, at the base of the 

 stamens, large and deeply fringed. 



Stem, pale and slender, scarcely one foot in length. 

 Fruit, globular, with depressed apex, yellowish. 



Found, on rather dry soil, from New York to Florida, and 

 westward to the Pacific. Very variable. 



(3) Slender-Flowered Dodder. C. tenuiflbra, Eng. 

 Flowers, one twelfth inch in length, or less, usually four- 

 parted, in lengthened or angled clusters. Corolla, 

 with a slender tube deeply bell-shaped, the tube usually 

 longer than the lobes. Corolla-lobes, and calyx-lobes, 

 oblong and blunt. Scales, at the base of the stamens, 

 shorter than the tube and fringed. 



Stems, coarse, yellow. 



Friiit, one twelfth inch or a little more in diameter, globose 

 with depressed apex. 



Found, in wet ground, from Pennsylvania westward and 

 southward. Favorite supports are button-bushes, tall 

 asters, etc. 



(4) Comely Dodder. C. decora, Eng. 



Flowers, one eighth inch in length or a little more, fleshy 

 and sometimes slightly rough, broad bell-shape, in 

 loose clusters. Corolla-lobes, five, spreading or erect, 

 with the pointed tips turned in ; egg-shape to lance, 

 shape. Edges, minutely round-toothed. Calyx-lobes, 

 triangular, pointed. Scales, large, deeply fringed. 



