PTERIDOPHYTA. 



As to the Pteridophytes of this district, we refer to the very important 

 paper by Dr. C. Christiansen : On some species of Ferns collected by Dr. 

 C. Skottsberg in temperate South America. Arkiv for Botanik, Bd. 10, 

 n. 2. (Stockholm.) When quoting this paper we use the following 

 abbreviation: C. Chr. Some Ferns. 



Family i. OPHIOGLOSSACE^;. Macl., p. 127. 

 OPHIOGLOSSUM L. (Chiroglossa Presl, by Macl.) 



O. PALMATUM L. Macl., p. I27- 1 



The species is to be deleted. It occurs in tropical and subtropical 

 countries, but is not found in Patagonia. 



O. CROTALOPHOROIDES Walt. 



A very interesting find made in E. Falkland by Dr. Halle, member of 

 the Swedish Expedition to Patagonia and Fuegia, 19071909. 



This species occurs also in Central Chili, and in the Southern United 

 States. 



BOTRYCHIUM Sw. Macl., p. 127. 



Spore cases sessile in 2 rows on the face of spikes which form a com- 

 pound panicle. 



(Professor Skottsberg regards all the Patagonian specimens of Botrychium as belonging to one 

 species, which he would provisionally call B. lunaria ; but it differs from that widely distributed 

 species ; and he had reserved a final decision for further study. The var. Dusenii meets this case.) 



BOTRYCHIUM ANALYSIS. 

 a. Small ; bud inclosed in base of stem. 



b. Vernation straight ; sterile part simple or 2-5-lobed. B. simplex. 



62. Vernation partly inclined. 



c. Buds glabrous ; sterile frond pinnate. 



d. Sterile parts alone bent (Eur., N. Amer., Staten Is.). B. lunaria. 



dz. Both parts bent in vernation. B. matricariafolium. 



1 All references to Macloskie will be abbreviated like the above. As to the signification of 

 other abbreviations used in the following, I refer to the appended list of literature. 



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