TAB: COLD 
TRICHOMANES ANKERSII. 
FILICES.—GvnaTzx. Br. 
PoryPopiaczsm. Kaulf. Firrczs vere. Willd., Spreng. 
Gzs. CHag. TRICHOMANES, 9m. Sw.  Sori marginales. Capsule sessiles, receptaculo 
communi cylindraceo insertze, intra Zmvolucrum monophyllum, suburceolatum, ore hiante, 
textura frondis. Zr. 
TnicHOMANES zfnkersii; caudice repente scandente, frondibus copiosis assurgentibus lato-lanceo- 
latis brevissime stipitatis profunde pinnatifidis, laciniis oblongis obtusis patentibus angulato- 
dentatis inferioribus nonnunquam iterum pinnatifidis, involucris subcylindraceis pedicellatis 
plerumque solitariis ad basin superiorem fere omnium laciniarum. 
Trichomanes Ankersii. Parker MSS. 
Has. Demerara. 2D. JJ. /4nkers. 
Caudex longissime repens, filiformis, subtus radiculas brevissimas emittens, frondibus quasi pinnatus. 
Frondes alternze, numerose, palmares ad spithamseam, assurgentes, brevissime stipitatee, oblongo- vel lato-lanceo- 
latze, basi sublatiores, profunde pinnatifidze, rigido-membranaceze, pulcherrime reticulatze, nitidiusculse, sicci- 
tate nigrescentes.  Lacinie subhorizontaliter patentes, unciam longs, obtusse, distincte pinnatim nervosse, 
angulato-dentats, supremis minoribus, integre, inferioribus nunc iterum subpinnatifidee, vel basi inferiore 
. lobatze. 
Involucra suburceolato-cylindracea, exserta, etiam pedicellata, plerumque solitaria, ad basin superiorem fere omnium 
laciniarum, erecta, ore brevi-dilatato, vix bilabiato. 
Heceptaculum longissime exsertum, involucro fere quadruplo longius. 
Capsule suborbiculares, peltatee, annulo latissimo cinctze. 
Semina globoso-angulata, viridescentia, nunc obscure reticulata. 
Fig.1. Portio frondis cum involucro. f2. Portio lacinize frondis. £3,4. Capsule. f.5. Semina : —magn. auct. 
We are indebted to our excellent friend C. S. Parker, Esq. of Liverpool, who has paid particular 
attention to the Ferns of Guiana, for specimens of this beautiful and hitherto undescribed species 
of Thichomanes. It was discovered in Demerara by Mr. James Ankers, manager of Plantation 
Coffee-Grove, Essequibo ; to whom, through the kindness of Mr. Parker, our collections are 
indebted for many rare specimens of plants of that country, especially aquatic ones,—such as 
Parkeria pteridioides, Marsilea polycarpa, Hiydromystria stolonifera, Pontedera cerulea, &c. We 
gladly, therefore, accede to Mr. Parker's wishes in dedicating this plant to its discoverer. 
In its mode o growth, 7. nkersii is allied to. 7". radicans; in its fronds, to 7. sinuosum and 
Ls 
erispum, frox of which its fructification is totally at variance. 
