COMPOSITAE (COMPOSITE FAMILY) 



491 



Means of control 



Frequent cutting close to the ground, throughout the growing 

 season, will prevent seeding and will starve the perennial roots. 

 New infestations, if areas are not too large, should be promptly 

 hand-pulled as soon as observed. 



SCENTLESS CHAMOMILE 

 Matricaria inoddra, L. 



Other English name: Corn Mayweed. 



introduced. Annual or winter annual. Propagates by 



Time of bloom : June to August. 



Seed-time: July to September. 



Range: Newfoundland to New Jersey, 

 westward as far as Michigan. 



Habitat: Cultivated fields, meadows, road- 

 sides, and waste places. 



Not so disagreeable a plant as the ill- 

 scented Dog Fennel, but a gross feeder and 

 holding ground which should be occupied 

 by better plants. Stem one to two feet in 

 height, smooth or nearly so, very much 

 branched. Leaves alternate, numerous, 

 deep green, sessile, twice or thrice pinnately 

 dissected into linear, almost thread-like, 

 lobes, the rachis somewhat dilated at base. 

 Heads terminal on the many branchlets, 

 about an inch broad, on naked peduncles ; 

 rays twenty to thirty, white, spreading, 

 pistillate, and fertile ; disk-florets yellow, 

 tubular, perfect, and fertile, their corollas 

 five-toothed ; bracts of the involucre green, 

 with brown, scarious margins, obtuse, and 

 spreading. Achenes strongly three-ribbed, 

 tipped with a short, entire-edged or four- 

 toothed crown. 



Means of control the same as for May- 

 weed. (Fig. 342.) 



FIQ. 342. Scentless 

 Chamomile (Matricaria 

 inodora) . X j. ' 



