MICHIGAN WEEDS. 



329 



KNOTWEED FAMILY. 

 BRACEAE. 



ILLECE- 



The plants of this small family much re- 

 semble those of the Pink family, and by many 

 authors are placed in that family. 



Fig. 66 (59). 



Knawel. 



Scleranthus annuus L. A 

 homely, light colored, much branched, little 

 weed, 4-12 cm. high; leaves awl-shaped; flowers 

 obtuse, seed held by the hard persistent calyx; 

 having the appearance of a dry-ground chick- 

 Naturalized at the Agricultural College and 

 at Ann Arbor. Introduced from Europe. 



CARPET-WEED FAMILY. AIZOACEAE. 



Mostly herbs, prostrate and branching, 

 differing from purslane and the chickweeds by 

 having the ovary two-several-celled, stamens 

 and petals sometimes numerous. About 500 

 species, mostly of warm regions, only one 

 having reached Michigan. 



Fig. 67 (60). 



Carpet- weed. Indian Chickweed. Mollugo 

 vertidllata L. A smooth, prostrate, much- 

 branched annual, forming mats; leaves in 

 whorls, spatulate. Introduced from farther 

 south. Sandy fields and roadsides in the 

 central and southern regions of the state. 



