COMPOSITE 41 



forms under only IO species. No attempt is made here 

 even to enumerate all the forms which are regarded as 

 species by the compilers of Swiss floras ; the leading 

 types only are mentioned, round which the remainder 

 may be regarded as grouping themselves. 



A. Stem simple, leafless or with very few leaves ; capi- 

 tules very few ; flowers light yellow ; plant usually with 

 long runners : H. Pilosella, L. ; a very common low- 

 land species ; with which are associated the alpine forms 

 Hoppeanmn, Schultz; Peleterianum, Mer; and tar dans t 

 N. P. 



B. Resembling the last, but stem more leafy ; capitules 

 more numerous: H. Auricula, Law., a lowland species; 

 with the alpine forms fuscum, Vill. ; acutifolium, Vill. 

 (furcatum, Hoppe); alpicolum, Schleich.; and glaciate, 

 Reyne. 



C. Resembling the last, but stem much branched, leafy; 

 capitules numerous, crowded ; flowers often orange : H. 

 aurantiacum, L. ; piloselloides, Vill. ; Laggeri, Schultz. 



D. Root-stock without stolons, but with rosettes of 

 radical leaves at the time of flowering ; capitules solitary, 

 umbellate ; involucral bracts in many rows. 



a. Pits of receptacle neither ciliate nor margined: 

 H. helveticum, Briigg. ; alpinum, L. ; nigrescens> Fries ; 

 glanduliferum, Hoppe ; armerioides, Arv. ; piliferum, 

 Hoppe ; Bernense, Christ ; villosum, L. ; flexuosum, W. 

 and K. ; dentatum, Hoppe ; glabratum, Hoppe ; areni- 

 cola, Godr. ; bupleuroides, Gmel. ; porrifolium, L. 



b. Pits of receptacle with a ciliate or slit membranous 

 margin ; involucre and stalk of capitule glandular-hairy : 

 H. longifolium, Schleich. ; amplexicaule, L. ; pulmon- 

 arioides, Vill. 



