TAB. LXm. 



Trichomanes cellulosum, Kl. 



Caudice medioori ascendente vel longe repente rigidissime 

 fibroso-radiculoso, stipitibus sparsia approximatis 2-4 unci- 

 alibus superne alatis firmis atris, frondibus 2-4 uncias lon- 

 gis rigidis atro-viridibus laxe cellulosis (areolis subrotundis) 

 tri-4-pinnatis seu potius pinnatifidis, laciniis copiosis subpa- 

 tentibus linearibus seu subspathulatis obtusis integerrimis, 

 costa centrali crassa rigida, soris copiosis marginalibus lacinias 

 breves terminantibus, involucro brevi-cylindraceo marginato 

 ore paululum dilatato integro, collumella elongata longe ex- 

 serto crasso. 



Trichomanes cellulosum, Kl. in Linncea, 18, p. 531. Kze. in 

 Bot. Zeit. 5, p. 418. J. W. Sturm, in Mart. Fl. Bras. 23, 

 p. 269, t. 18, f. 13, Van den Bosch, Syn. Hymenoph, p. 25. 



Tr. filiforme, J. W. Sturm, in Mart. 1. c. p. 269, t. 18, f. 14? 

 ( The two figures in Martins are represented in et nature- 

 printing" excluding the caudex, and give no idea of the 

 fructification or of the nature of the frond). 



Hab. Tropical America; Koraima, British Guiana, Robt. 

 Schomburgk, and Kunnuku Mountains, Rich. Schomburgk, n. 

 1184 ; Valley of the Amazon ; Bafia of Rio Negro and San 

 Carlos, N.Brazil, R. Spruce, n. 1399, 2278 (n. 873, accord- 

 ing to Sturm,) and n. 2838, segments of the fronds a little 

 broader and more opaque. 



Few who have not studied the numerous individuals of the 

 family of Hymenophyllacece, can have an idea of the difficulty 

 that attends their correct discrimination. Happily Dr. van den 

 Bosch, for some time distinguished by his valuable writings 

 on the Mosses of the Netherlands possessions in the Malay 

 Archipelago, has taken up this beautiful group of Ferns, with 

 an amount of knowledge and of zeal which augurs well for the 

 Monograph, and many of the species are to be illustrated by 

 figures. The present species seems to be peculiar to B. Gui 

 ana and to the valley of the Amazon ; and judging by the 

 references to Spruce's specimens, T. filiforme of J. W. Sturm 

 in Martius is only a var. of it. 



Tab. LXIII. Exhibits a plant of Trichomanes cellulosum, 

 Kl. ; — not. size. f. 1. Portion of a pinna with fructification. 

 /. 2. Involucre laid open to show the capsules at the base of 

 the columnar receptacle ; — magnified. 



Cent. 2. x. 63. 



