128 TRICHOMANES. 



long. Frond I foot to H foot, ovate in circumscription, rather rigid, eve- 

 rywhere quite black in the dry state and opaque, exhibiting very minute 

 semitransparent dots when held between the eye and the light and seen 

 through a magnifier; which dots arc the areolae of the reticulations. Di- 

 visions remote, superior secondary ones at the base of the primary ones ly- 

 ing against the rachis. Involucres quite free, not even winged. Plumier's 

 plant may perhaps be intended for the same species; but however excellent 

 that author's work is, for the period at which it was published, many of his 

 species cannot be determined by his figures. T have not seen the present 

 fern from any of the West Indian Islands ; only from three localities on 

 the continent of S. America. 



37. T. (jlaiico-fuscnm, Hook. ; fronds rather tall oblongo- 

 lanceolate bipinnatifid glauco-fuscous when dry, primary di- 

 visions broad-lanceolate, the segments all acute linear simple 

 or forked, involucres supraaxillary on short segments partial- 

 ly sunk short-cylindrical attenuated at the base, the mouth 

 broad spreading scarcely 2-lipped, stipes filiform glabrous in- 

 distinctly winged except above. (Tab. XL. A.) Hook, in 

 Nighti II gale's Oceanic Sketches, App. p. 131. 



Hab. Pacific Islands, Sir Thos. Nightingale. Penang, Ladrj Dalhousie. 

 Ceylon, Mrs. Genl. Walker. Philippine Islands, Cuming, n. 219. — A well 

 marked species. Stipes slender, filiform, only slightly winged above, 2 — 4 

 or 5 inches long. Frond 5 — 6 or 8 inches ; in a dried state at least always 

 of a brownish colour suffused with a glaucous tint, especially on the under 

 side. 



Dubious Species of the Section decompound 1 1/ pinnatifid. 



38. T. Guifteense, S\v. ; " fronds pinnate, pinnae oblong 

 decurrent inciso-pinnatifid, segments obtuse subserrate (.''), 

 costa and stipes margined." Sio. Si/n. Fil. p. 142. Willd. Sp. 

 PL v. p. 506. — Sierra Leone, Afzelms. 



39. T. Arbnscula, Desv.; "fronds deeply bipinnatifid gla- 

 brous subimbricated subpinnatifid broader at the apex, ulti- 

 mate segments oblong obtuse, sori aggregate, receptacles 

 elongated, stipes winged." Desv. in Mem. Linn. Soc. Par. ii. 

 p. 236. — Guiana, {Desvaux). " Two inches high." 



40. T. striatum, Don ; " frond bipinnate, pinnae alternate, 

 leaflets elliptical membranaceous pellucid pinnatifid, lobes 

 linear obtuse, rachis winged, involucres tubulose." Don, 

 Prodr. Fl. Nep. p. 11. — Nepal, Hamilton. — " Fronds a span 

 to a foot high ; fructiferous ones more opaque and cut into 

 narrower segments." 



41. T. thnjoides, Desv.; " fronds decurrently tripinnatifid, 

 pinnae alternate, pinnules decurrent deeply pinnatifid, seg- 

 ments spreading at the apex subtrilobulate, rachis winged, 

 stipes somewhat angled crinite at the base." Desv. in Mem. 

 Linn. Soc. Par. p. 328. — Mauritius, {Desvaux). — " Fronds 8 

 — 10 inches; stipes 8 inches; pinnae 1|^ inch long." 



