12 THE FLORA OF THE ALPS 



23. Matricaria, L. 



Ray-flowers ligulate, white, female, in one row, or ; 

 disk-flowers bisexual ; anther-cells not tailed ; receptacle 

 hollow, elongated after flowering; pappus o. Not 

 alpine. 



M. Chamomilla, L., Wild Chamomile, with its pecu- 

 liar odour; and M. inodora, L. {Pyrethrum inodorum, 

 Gaertn.), distinguished by its want of scent and its very 

 narrow leaf-segments; are common weeds in cultivated 

 land. 



24. Leucanthemum, Tourn. 



Ray -flowers ligulate, female, white; disk -flowers 

 tubular, bisexual, yellow ; involucre usually flat or con- 

 cave ; involucral bracts with scarious margins ; pappus 

 o or a membranous wing; fruit of ray-flowers ribbed, 

 of disk-flowers compressed. 



L. vulgare, DC. {Chrysanthemum Leucanthemum, L.), 

 Ox-eye Daisy; and L. Parthenium, G. Gr. {Matricaria 

 Parthenium, L.), Feverfew, are common lowland plants. 

 The following are alpine or sub-alpine : — 



A. Involucre hemispherical; heads corymbose: — L. 

 corymbosum,G. Gr.; leaf-segments in 8-15 pairs, those 

 of the upper leaves linear-lanceolate, inciso- dentate; 

 mountain woods ; Western Switzerland, Dauphiny, ^yte.- 

 nees, not common. 



B. Receptacle somewhat concave; capitule solitary; 

 stem nearly leafless : — L. alpinum, Lam. ; stem 1-3 in., 

 glabrous, upper leaves linear, entire; alpine pastures. 

 L. minimum, Vill. ; plant small, tomentose, with viscid 

 or rough hairs ; rare ; Zermatt. 



