LINDMAN, AMERICAN SPECIES OF TRICHOMANES SM. ^A 



the secondary veins rise in rather acute angles from the 

 «trono- and nearly straight (or faintly flex nose) midrib, and 

 the tertiary ones are accompanied by a few short spurious 

 venules; the caudex is threadlike, generally rather thick, 

 but not very thickly tomentose; 



the stipes is hairy only on the lower part; 



the involucre is for the most part free and exserted. 



As to shape and size, the frond very much resembles 

 Tr. reptans Sw. (Herb. Swartz; see below, fig. 17), l»ut is 



Fiji. 11. Trichomu'iies Kraussii Hook, ct Orev., ^4 a fertile t'rniul from Gua- 



<lal<)ui)e, ;i si»eciiiien in Herb. Swartz (natural size): B cells of the same 



(X 350); C fertile frond from Rio de Janeiro, f. longissimum m., Mosén n. 



3112 (natural size); D cells of the same (X 350). 



distinguished by the venation, especially by the much less 

 numerous veinlets. 



I have examined the cellular structure of the specimens I 

 consider belong to this species, and 1 found the walls con- 

 siderably thinner than in Tr. hynicnoidc.s, only 0,oog — 0,oo7 mm 

 thick, fig. 7. 



1 collected this species in Paraguay, San Bernardino, 

 on rocks in a shady and humid part of the old forest, Ex- 

 ped. 1. Kegnell., n. A, 2207 (October 1893, with fronds in 



