282 MALVACEAE (MALLOW FAMILY) 



segments again deeply cut or pinnatifid, very short-petioled. 

 Flowers clustered at the ends of stem and branches and in the 

 upper axils, often nearly two inches broad, pale rose-color or white, 

 pink-veined, the central column of many styles and anthers nearly 

 a half-inch in height ; calyx with five short, triangular-ovate, very 

 hairy lobes. Carpels fifteen to twenty, arranged in a circle, also 

 densely hairy. 



Means of control 



Close cutting before the development of any seeds, repeating 

 the treatment as the plants send up new shoots from the roots. 



BLADDER KETMIA 

 Hibiscus Tribnum, L. 



Other English names: Flower-of-an-hour, Goodnight-at-noon, 



Shoofly Plant, Venice Mallow. 

 Introduced. Annual. Propagates by seeds. 



Time of bloom : July to September. 

 Seed-time: August to October. 

 Range : Nova Scotia to Minnesota, south- 

 ward to Florida. 



Habitat: Cultivated ground, roadsides, 

 waste places. 



At one time this weed was much helped 

 in its wide distribution by seedsmen who 

 recommended it as an ornamental plant. 

 But for that purpose its beauty is too 

 evanescent, and in grain field and garden 

 it has proved itself extremely obnoxious 

 because of the long vitality of its seeds ; 

 ground once fouled continues to produce 

 plants for years, as cultivation brings the 

 dormant seeds to surface light and 

 warmth. (Fig. 198.) 



Stems ten to twenty inches long, 

 branched from the base, slender, rather 

 Tr'onum). weak and often reclining, covered with 

 fine, bristly hairs. Leaves broadly heart- 



