112 



In a specimen from Borgevær in Lofoten partly according 

 with f. verrucosa partly furnished with some crowded, short and 

 råtner coarse branches reminding one of those in certain forms of 

 L. glaciale I found well developed and apparently mature bisporic 

 sporangia about 180 \j. long and 80 ji broad. The part of the 

 plant agreeing with the precent species was sterile. It may be 

 that spores of L. glaciale have germinated on the named form of 

 L. varians, or both are grown together, though any limit between 

 the crusts of the two supposed species is not to be detected, and 

 the crust in all most nearly resembles that of the last named 

 species. 



The named conceptacles finally grow down into the frond, 

 but overgrown ones appear seldom to be found in any great 

 number. 



In one of my specimens of f. verrucosa I found a few con- 

 ceptacles of cystocarps. Pl. 18, fig. 5. They are conical, often 

 rather low, 450 — 500 /* in diameter at the base, with a rather 

 acute tip and traversed by a single orifice, on the one side ap- 

 proaching those of L. apiculatum in appearance, but not so abruptly 

 passing into this tip as in that species, and on the other side rather 

 more resembling those in L. colliculosum, but lower and so far 

 as I have seen never constricted farther down, as often is the case 

 in the last named species. This tip easily falls away and then 

 the conceptacles look depressed-conical or subhemispherical. I have 

 not succeeded in finding the spores. 



Some few other conceptacles on the same individual and ap- 

 parently similar in shape probably are those of antheridia. The 

 great er part of the roof is in most of them fallen away, and al- 

 ways the uppermost part. They, however, seem to have been 

 rather low, and are about 200 — 250 fi in diameter at the base. 



I do not know which of the quoted forms might be concidered 

 the typical form of the species. They certainly are not well de- 

 fined, although a limit frequently may be drawn, and they are 

 often even considerably differing, and in my opinion ought to be 

 regarded as denominated forms. Along the coast of Finmarken 

 most of the specimens gathered belong to f. irregularis or forms 



