— Site Be 
¥0. Matricaria (Tourn.)L. 
Annual weedy herbs with alternate leaves thrice pinnatifid into small 
linear divisions. Heads numerous, discoid, ovoid or subglobose, compact 
their involucres formed of about 5 series of oblong membranous bracts with 
scarious margins; receptacles conical, naked. Flowers greenish yellow. 
Achenes clavatg, curving somewhat, 3-ribbed; pappus a low ridge around the 
apex 
Pineapple Weed, 
: SS epee (Purshg) Buch. Wild Chamomile. Glabrous annual 
herbs 10-30 cm. tall, with fragrant foliaze; leaves 1-3 om. long, thrice 
pinnatifid, the ultimate segnents scarcely 1 mm. wide or less; heads 3-6 mm 
e P 1 ° t } : 
in diaméter, the bracts of the involucre 3 mm. long; achenes ].3 mme long 
ae . ° a : 
>(ii. matricarioides Porter. ). 
A frequent weed in waste places around stables and dwellings and in 
pastures. 
a ro 
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