6 PATAGONIAN EXPEDITIONS I BOTANY. 



frond ; sterile frond ovate or oblong, obtuse or truncate, bipinnate or once- 

 pinnate, with pinnatifid pinnae ; pinnae usually 2-6 on both sides of the 

 rachis, generally opposite, remotely attached, subhorizontal or erect-patent, 

 usually oblong, obtuse ; pinnulae suborbicular to oblong, obtuse or trun- 

 cate, often crenate-lobed at the end with 2 or 3 lobulets ; fertile frond 2- 

 or 3-pinnate. 



Family 2. HYMENOPHYLLACE^:. 



HYMENOPHYLLUM L. 



H. ABRUPTUM Hook. fil. var. BREVIFRONS (Kze.) Franck. 

 Should be deleted, being, in fact, a new species described by C. Christ- 

 iansen under the name of H. Skottsbergii C. Christ. Some Ferns, p. 22. 



H. DENTATUM Cav. 



(Vice H. Bridgesii Hook. Macl., p. 128.) 



H. Bridgesii and H. dentatum Cav. are identical. The latter name 

 being older, it should be chosen instead of the former. 



H. DUSENII Christ. Macl., p. 12. 



Should be deleted, being identical with Serpyllopsis ccespitosa (Gaud.) 

 C. Christ, var. Dusenii Christ. C. Christ. 



H. GLABBERRIMUM C. Christ, is to be replaced by the following: 



H. FALKLANDICUM Bak. Macl., p. 129. 



Syn. H. caspitosum Christ., H. glebarium Christ. 

 Occurs also in Fuegia and in South Georgia. 



Macl., p. 130. H. nigricans Colla. 

 H. nigricans is identical with H. dichotomum Cav. and is, therefore, to 



be deleted. 



Macl., p. 130. H. subtilissimum Kze. 



H. subtilissimum should be replaced by H. ferrugineum Colla, the latter 

 name being the older. 



(Addenda to Hymenophyllum, p. 128.) 



H. TRICHOCAULON Phil., Anal. Mus. Nac. Chil., Tom. 94, p. 360. 



Stipes pilis nigris sat longis vestitus, c. 2.5 cm. longus ; frons ovata, c. 

 5.0 cm. longa et 3.5 cm. lata, glabra, tripinnata, pinnis (c. 10 utrinque) 



