I 



182 The Ottawa Naturalist. [November 



Var. BREVICALYCINA Wettsteiii (/>; litteris). 



Differs from the type by its much shorter calyx and by the 

 very deep purple colour of the corolla, the lobes ot which are den- 

 ticulate, but destitute of fringes. 



Collected in a swamp on Mt. Massive near Leadville, Col- 

 orado, at an elevation of 11,000 feet, near timber-line. 



Among the other North American species, which by Gray 

 were referred to G. serrata Gunn., are the two varieties : gratidis 

 and holopctala, none of which, however, are referable to this or 

 any of the other species that occur in this country. They represent 

 several vegetative and floral characters by which they appear to 

 be distinct from all the others, and may consequently be consid- 

 ered as independent species ; G. holopetala (Gray) and G. grandis 

 (Gray). 



It would, thus, appear as if G. serrata Gunn. has not, so far, 

 been collected in North America, judging from the collections, 

 which have been examined, but we do not think it improbable that 

 it may be found on this continent, since it occurs on the west-coast 

 of Greenland ; it should be looked for on the north Atlantic coast 

 in the immediate vicinity of the sea-shore and north of the arctic 

 circle. 



The American species, which we have described in the preced- 

 ing pages, represent members of the section Crossopetalce Frcel., 

 to which G. serrata Gunn. belongs, but they exhibit a marked 

 difference from this by the carinate calyx-lobes, the presence of 

 nectaries and by the winged stamens ; their habit is, also, some- 

 what different, if we consider G. proccra and G. nesophila. Small, 

 one-flowered specimens have been found of all these species, but 

 such individuals do not deserve rank as even varieties. Their 

 small size, lesser developed foliage and the single flower may 

 depend on their development from poor seeds, on their occurrence 

 in drier soil or, finally, on the fact that they are developed as root- 

 shoots. Such root-shoots are not uncommon in G. holopetala and 

 have, furthermore, been recorded as characteristic of the European 

 G. ciliata L. in accordance with Irmisch. 



