492 COMPOSITAE (COMPOSITE FAMILY) 



WILD CHAMOMILE 

 Matricaria Chamomllla, L. 



Other English names: Horse Gowan, German Chamomile. 



Introduced. Annual or winter annual. Propagates by seeds. 



Time of bloom : June to August. 



Seed-time: July to September. 



Range: Atlantic States, westward to Ohio. 



Habitat: Fields, roadsides, and waste places. 



Very like the preceding species, but with rather pleasantly 

 aromatic foliage. Stem smooth, much branched, one to two feet 

 high. Leaves pinnate, twice or thrice divided into many linear 

 lobes. Heads numerous, terminal, about three-fourths of an inch 

 broad, on very slender, naked peduncles ; rays ten to twenty, 

 white, drooping as they mature, pistillate, fertile ; disk-florets 

 perfect and fertile, yellow, the receptacle at first rather flat but 

 becoming conic and hollow ; bracts of the involucre oblong, obtuse, 

 green, with brown, scarious margins. Achenes short, three-ribbed, 

 and without pappus. 



Means of control the same as for Mayweed. 



PINEAPPLE WEED 



Matricaria suaveolens, Buchenau. 

 (Matricaria matricarioldes, Porter.) 



Other English name: Rayless Chamomile. 



Native. Annual. Propagates by seeds. 



Time of bloom: May to August. 



Seed-time: June to September. 



Range: Atlantic States from New Brunswick to Pennsylvania, 

 naturalized from the Pacific Slope where it is native, and com- 

 mon as far east as Wyoming and Montana. 



Habitat: Fields, roadsides, and waste places. 



This plant not only has found its way East, but has gone abroad 

 and is naturalized as a weed in northern Europe. Stem rather 

 stout, six to eighteen inches tall, smooth, branching, and very 

 leafy. Leaves pinnate, twice or thrice dissected into short, very 

 narrow, and sharply pointed lobes : when bruised they have an 

 odor suggestive of pineapples. Heads very numerous on short 



