260 SUMMER FLOWERS. 



(147) Chrysanthemum. 



* Ray -florets wliite. 



C. Leucanthemum : stems erect, simple or slightly branched, 

 1-2 feet high ; leaves obovate, coarsely-toothed, on long stalks, 

 those of the stem narrow, sessile ; flower-heads solitary on 

 long terminal peduncles, rather large ; involucral bracts bor- 

 dered by a brown, scarious edge. Oxeye Daisy. Pastures, 

 banks, etc. El. June to August. 



C. Parthenium : biennial ; stems erect, branching, a foot 

 or more high ; leaves pinnate, the segments ovate or oblong, 

 pinnatifid, toothed ; flower-heads numerous, about half an inch 

 in diameter, in a terminal corymb; achenes crowned by a 

 minute toothed border. Feverfew. Roadsides, and in waste 

 places. Fl. June, July. This plant is often called Pyrethrum 

 Parthenium, and is a strongly scented aromatic medical herb, 

 with bitter tonic properties. 



C. inodorum : annual ; stem erect or spreading, branched, 

 1-1 \ feet high; leaves twice or thrice pinnate, with numerous 

 narrow-linear, almost capillary lobes; flower-heads rather 

 large, on terminal peduncles ; involucral bracts with a brown 

 scarious edge ; receptacle convex or hemispherical, not conical ; 

 achenes ribbed, crowned with a minute entire or four-toothed 

 border. Fields and waste places. Fl. July, August. 



Var. maritimum : stems diffuse; leaves rather fleshy; 

 flowers smaller. Sea coast. 



** Hay-florets yellow. 



C. segetum : annual ; stem glabrous, erect, one foot high 

 or more, with spreading branches ; lower leaves obovate and 

 stalked, the upper ones narrow and stem -clasping, with a few 

 teeth at the top; flower-heads rather large, ou terminal pe- 



