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^E. MacL, p. 127. 

 OPHIOGLOSSUM L. (Chiroglossa Presl, byMacl.) 



O. PALMATUM L. Mad., 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, 1907-1909. 



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-S-lobed. B. simplex. 



b2. Vernation partly inclined. 



c. Buds glabrous ; sterile frond pinnate. 



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



d2. Both parts bent in vernation. B. matricaricefolium. 



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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