—23— 



squarrose leaves, though the Florida specimens are commonly much reduced in 

 size and S. compactum may itself take on robust forms with squarrose leaves. 

 The stem is usually greenish yellow rather than brown, the stem leaves show a 

 tendency to hemiisophylly, the branch leaves give the really distinctive charac- 

 ter, showing chlorophyll cells exposed on outer surface, while the walls of the 

 hyaline cells, where overlying these, are finely papillose, a condition first noted by 

 Warnstorf ^ These papillae are considerably finer than in the case of 5. papillo- 

 sum and may readily escape notice but will generally be seen if carefully looked 

 for. In the Florida specimens they are often reduced or lacking. The pseudo- 

 pores found in the leaf of the last species are normally entirely lacking in this, 

 while the real pores on the outer surface may be considerably more numerous, 

 though their number is variable and they are in some cases almost entirely absent. 

 The plants are dioicous so far as known and they do not often fruit, though the 

 compact forms from Florida form something of an exception in this respect. 

 The perichaetial leaves are less strongly falcate-secund than in the last species and 

 have a greater contingent of non-fibrillose hyaline cells within the border. I 

 also find a difference in the size of spores, those of this species running mostly 

 35-45/A, while those of 5. compactum are generally 24-28/^. Specimens recently 

 determined by Warnstorf show a confusion of the two species, but one hardly 

 justified by the plants themselves. Of the two numbers (121, 122) in Eaton & 

 Faxon's Sphag. Bor. Amer. Exsic. distributed as 5. Garheri, No. 121 is in part S. 

 compactum. In several sets recently examined only the latter species was found, 

 but in my own set, for which I am indebted to the kindness of Dr. Geo. E. 

 Nichols, both species are present but distinguishable, as always, even macro- 

 scopically. 



The distribution of S. strictum is peculiar, its stations mostly relatively 

 remote from each other suggesting survivals of a former more general distribu- 

 tion, as is the case with S. Pylaesii. They stretch in North America from New- 

 foundland (or Labrador?) southward to Florida and Alabama with the single 

 reported station in Santo Domingo and that in Mexico well southward in Oaxaca 

 and at high altitude. I have also seen a second Mexican specimen in the her- 

 barium of the Copenhagen Botanical Garden collected by Liebmann (Musci No. 

 10) and named by Schimper 5. squarrosum. Warnstorf also reports a single 

 station from Ecuador in South America- and in Europe it is known as yet only 

 from the western coast of Norway, where it was collected by Kaalaas in 1889, 

 but remained unidentified until seen by Jensen in 1902.^ It is there confined to 

 the strip of coast and islands characterized by the interesting "Atlantic flora," 

 where I had the pleasure of observing it in quantity while collecting with Kaalaas 

 in Sondmore in the summer of 1907. In the summer of 1912 I saw it again at 

 Os (Osoren) south of Bergen. These field observations tend to confirm me in t he 

 opinion that it is a good species, as, though S. compactum was generally present 



^ Hedwigia 29 : 246f. 1890. 

 2 Pflanzenrich 51: 145. 1911. 



^ Cf. Kaalaas, Bryophyten in Romdals Amt 44. 1911. 



