MR. J. J. COOPER'S COSTA RICA FERNS. 25 
48, Adiantum Cooperi, n. sp. — Sti tipe and rachises quite 
naked, slender, glossy, castaneous. Lamina deltoid, 3-4-pinnate, 
firm in texture, glabrous, green, not at all glaucescent beneath, 
9-12 in. long. Pinne cut away on the lower side at the base, 
erecto-patent, the lowest pair much the largest. Final segments 
shortly petioled, rhomboid, }-% in. long, bart in. broad, deltoid 
Pellea on NaN i Sm.—P. angustifolia Baker. 
Pteris aquilina L. vars. lanuginosa and caudata.—P. quadriaurita 
Retz.—P. palmata Willd.—P. aculeata Sw.—P. incisa Thunb. 
Lomaria attenuata Willd.—L. procera Spren eng. 
Blechnum occidentale L., type and a small hiss with a very 
scaly rachis. — B. lon gifolium H. B. K., type and var. B. 
Sraxinewn Willd. Bs volubile Kaulf. 
A. lunulatum, rac and var. A. erectum Bory. mes cneahelien : 
Ku ze. — A, Serra L. & F. — ths rhizophorum . —A. mp 
auriculatum Sw A. bissectum —A, furcatunn Thun be din 
auritum Sw. ees cicutarium Sw. ae. bulbiferum Forst. — 
unze, var. costaricense, n. var. Pinne distinctly petioled, 
oectreread truncate at the base on the lower side, with a large 
separated auricle at the base on the upper side, and a blade much 
ae ju glandifolun var. macrosorum, n. var. Veins all free, 
os raised. Sori much longer ‘thes in the type. — A. 
trifoliatum 
Nevhrodiom Filia-mas var. paleaceum.—N, patens Desv.—N. con- 
terminum Desv., at least four varieties.—N. patulum Baker.—N. 
villosum Presl. 
Nephrolepis cordifolia Presl. : 
tangle des Car.—0. _< Presl. 
Polypodium trichomanoides Sw.— P. elasticum Rich. ae pecti- — 
natum Li. var. Wagneri Mett., and acuminatum, n. var.; texture 
er i Ww 
an ype; pi ni a very _acumi- 
nate. — P, plebeium Schlecht., type and var. P. ¢ 
Fée, and n. yar.; frond much eu than in the 
eso op spaced out, linear, crenulate, acuminate, 
JRE; Inns 
_ with a row of white dots near the edge on Pn: upper surtaes: 
ne —P. Friedrichsthalianum Kunze.—P. ¢ mcanum Sw.—P. thyssanolepis 
