13-2 TRICHOMANES. 



neriiUy pinnated ; the pinnae are remote, very thin, membranaceous, and 

 almost pinnatifid. Involucres large. In all my specimens there is a glau- 

 cous tinge in the dried state. 



Dubious Species of this sub-section. 



51. T. depauperatum, Bovy ; "fronds pinnate elongate 

 and slender, pinnules on the upper side trifurcate obtuse, sori 

 solitary on the upper side at the base." Bory, in Duperrey, 

 Voy. Bot. p. 283. — Onalan, D'Orfar, Isle de Wagiou, UUr- 

 ville. 



Caudex elongate creeping. {Sp. 52 — 55). 



52. T. venomni, Br. ; caudex very slender creeping fili- 

 form, fronds small pinnate, pinna linear remote obtuse sinu- 

 ate or rarely subbipinnatifid upper ones coadimate, lower one 

 on the base above with a solitary segment bearing the sunk 

 involucre which is urceolato-cylindrical, the mouth spreading 

 entire, costa and veins wavy. Br. Proclr. p. 159. Hook, et 

 Grev. Ic. Fil. t. 78. 



Hab. New Holland ; Port Jackson, Brown, Bpioe. Tasmania, Gunn, 

 Brown, J. D. Hoohcr. New Zealand, Menzies, A. Cunningham, J. D. 

 Hooker ; always on the trunks of trees. — A small species, 2—5 inches long, 

 very delicate, glistening. It has a peculiar hahit, and is not easily con- 

 founded with any other species. The stipes is very slender, filiform. 



53. T, cd'spitosmn, Hook. ; caudex creeping slender much 

 entangled and matted, fronds small oblong or oval, pinna; ra- 

 ther i'ew approximate or distant subimbricated oblong obtuse 

 concave sul3cymbiibrm, the vein or costa solitary stout, be- 

 neath as well as the rachis and short stipes setose with rather 

 long ferruginous hairs, involucres terminal and lateral obo- 

 vato-cuneate broadly winged at the margins compressed, 

 the mouth spreading with two broad semicircular short lips. 

 (Tab. XL. B.) — Hymenophyllum cajspitosum, Gaudich. in 

 Freyc. Voy. Bot. p. 374, t. 5, /". 2. — /3. elongatum ; fronds 

 longer and more slender, pinnae remote, involucres not lateral. 



Hab. Staten Land, Mcnzies. Falkland Islands, Gaudichaud, D^Urville, 

 J. D. Hooker. Rocks and trunks of trees, Hermite Island, Cape Horn, ./. 

 D. Hooker. — 13. Chiloe, Cuming, n. 14. — A very remarkable and well- 

 defined species, with a creeping caudex ; stipes 2 — 3 lines long. Fronds 

 scarcely an inch long in a., in /3. 2 inches. Pinnae or leaves sessile, but 

 scarcely decnrrcnt, singularly concave, quite entire, with a strong costa, 

 which beneath, as is the whole under side of the younger pinnfe, clothed 

 with long, coarse, ferruginous seta; ; when fully developed spreading, some- 

 what imbricated in a., singularly concave, with the sides turned upwards, so 

 as to be almost boat-shaped. Involucres terminal, or, more frequently, la- 

 teral, quite sunk in a somewhat altered pinna, so as to give the appearance 

 of two wings, hairy with small bristles or coarse apprcssed hairs, which how- 

 ever do not extend to the wavy and somewhat toothed lips. Receptacles 

 short, included, or longer than the involucre. The more elongated speci- 



