COMPOSITE 13 



C. Receptacle flat or somewhat concave ; stem leafy : 

 L. heterophyllum, DC. ; stem-leaves nearly regularly 

 toothed, lower leaves narrowed into a leaf-stalk, border 

 of involucral bracts narrow ; Southern Switzerland, Tirol, 

 Carinthia, rare. L. atratum, DC. ; resembling vulgare, 

 but dwarf, achenes of the ray with a membranous crest ; 

 alpine pastures, local. L. Gaudini, Dal. Tor. ; resembling 

 vulgare, but lower leaves nearly entire ; alpine pastures, 

 frequent. L. coronopifolium, Vill. ; leaves fleshy, brittle, 

 glabrous, deeply incised, radical leaves elliptical ; high ; 

 Switzerland, Piedmont, Dauphiny, Pyrenees. L. cera- 

 tophylloides, All. ; leaves fleshy, brittle, glabrous, shal- 

 lowly pinnatifid, radical leaves wedge-shaped ; very rare ; 

 Switzerland (Linderskopf), Dauphiny. L. maximum, 

 DC. ; capitule solitary, very large, stem up to 2 ft., 

 ray-achenes more or less crested; pastures; Dauphiny, 

 Pyrenees. 



25. CHRYSANTHEMUM, L. 



Resembling Leucanthemum, but ray-flowers yellow ; 

 achenes of ray-flowers triquetrous. 



C. segetum, L., Corn-Marigold; cultivated fields (not 

 in Switzerland). 



26. ACHILLA, L. 



Capitules small, in dense corymbs; ray-flowers few, 

 ligulate, short, white, yellow, or red ; disk-flowers tubu- 

 lar, bisexual ; receptacle scaly ; pappus o ; leaves very 

 deeply divided ; often densely caespitose. The alpine 

 species appear often to hybridise. 



A. Millefoliumj L., Milfoil, Yarrow, is very common in 

 grassy places ; and A. Ptarmica, L., Sneeze wort, in damp 



