CAEDUACEAE. 



405 



1. Chrysanthemum Leu- 

 canthemum L. WHITE-WEED. 

 WHITE OB OX-EYE DAISY. 

 (Fig. 446.) Perennial; stems 

 glabrous, or sparingly puberu- 

 lent, simple or little branched, 

 l-2 high, often tufted, the 

 branches nearly erect. Basal 

 leaves obovate, oblong, or spat- 

 ulate, coarsely dentate or in- 

 cised, narrowed into long slen- 

 der petioles; stem-leaves mostly 

 sessile and partly clasping, 1'- 

 3' long, the uppermost very 

 small and nearly entire; heads 

 l'-2' broad, on long naked pe- 

 duncles; rays 20-30, white, 

 spreading, slightly 2-3-toothed; 

 bracts of the involucre oblong- 

 lanceolate, obtuse, mostly gla- 

 brous, with scarious margins 

 and a brown line within the 

 margins; pappus none. 



Frequent in grassy places, 

 especially in Pembroke and Paget. 

 Naturalized. Native of Europe. 

 Widely naturalized in North 

 America. Flowers in summer 

 and autumn. 



2. Chrysanthemum Parthe- 

 nium (L.) Pers. COMMON 

 FEVERFEW. FEATHERFEW. (Fig. 

 447.) Perennial; stem puberu- 

 lent or glabrate, much branched, 

 l-2i high. Leaves thin, the 

 lower often 6' long, petioled, or 

 the upper sessile, pinnately 

 parted into ovate or oblong, pin- 

 natifid or incised segments; 

 heads numerous, corymbose, 

 slender-peduncled, 6"-10" 

 broad; bracts of the depressed 

 involucre lanceolate, rather 

 rigid, keeled, pubescent, acute 

 or aeutish; rays 10-20, white, 

 oval or obovate, spreading, 

 mostly toothed, long-persistent; 

 pappus a short toothed crown. 

 [Matricaria Parthenium L. ; 

 Pyrethrum Parthenium Smith.] 



Ocassionally escaped from 

 cultivation. Grown in gardens. 

 Native of Europe. Flowers in 

 summer and autumn. 



