40 



ARKIV FÖR BOTANIK. BAND 1. 



As Tr. sphenoides is rather variable — as stated already 

 by its author (Kunze, op. cit., p. 215, 216) and by Sturm in 

 Flora Brasil., fasc. 23, p. 277 — it is difficult to give a clear 

 idea of its outline and shape. It is generally placed by au- 

 thors next to Tr. punctatum (see below, fig. 30, 31), or con- 





D 



Fig. 24. A — C TricJiomanes sphenoides Kze. cellular structure, A margin of 

 a sterile frond from Guadaloupe. Herb. Casström (X 110); B and C margin 

 and centre of a young frond from the same specimen as A (X 110): D — F 

 Trich. fontanum Lindm. n. sp., D and E margin and centre of a fertile 

 frond from Soutli Brazil, Exped. 1, Regnell. n. A, 1043 (X 110);^ some more 

 magnified cells of this latter ( X 350). 



founded with this, for instance by Christ (Die Farnkräuter 

 der Erde, p. 20). I therefore think the roundish or somewhat 

 reniform outline of certain fronds has attracted special atten- 

 tion, — but this shape only occurs in the young, sterile 



