ACROSTlCnUM, ^ GYMXOPTEKIS. 2/5 



teral ones and the terminal one as in the second form just de- 

 scribed, costoe rather stout, costules indistinct, veins every- 

 where distinct regularly anastomosing into rather large uni- 

 form hexagonal areoles rather smaller towards the margin 

 quite destitute of any free included veinlets ; fertile fronds 

 similar to the sterile ones hastate or pinnatifid but much 

 smaller. 



Hah. Fernando Po, on the banks of a river, Giitlav Mann, n. 4-12, Nig'.^r Ex- 

 ped., Barter. West trojjical Africa. Ctirror. — \\\ one of my specimens of tliis 

 ])lant, which has the ai)|)earance of Ijcing palustral or throwing in wet i)laces, tiie 

 costnles are sufficiently a|>i)arent, but are veniforin, aud the frond is regularly re- 

 ticulated as in Neurocn/lis prrpsfantissima. The venation is quite interniediate 

 between § Gymnopterin and § Nturucailis. 



154. A. (Gymnopteris) nicotiame folium, Svv. ; caudex long 

 stout creeping paleaceous, stipites 1^-2 feet long scaly at the 

 base, fronds submembranaceous 1-2 feet or more long ])in- 

 nated with 3-7-10 petiolated pinna;, terminal one the largest 

 and longer petioled; sterile ])iniKC 4-8 inches long elliptical- 

 ovate rather suddenly acuminate subdentato-sinuatc at the 

 margin, costules manifest united by curved veins forming 

 arched areoles which are filled up by anastomosing rather 

 small nearly square areoles including free branched often 

 divaricated veinlets ; jertile fronds much smaller than the 

 sterile, pinnae oblongo-lanceolate. — Siv. Syn. Ft/, pp. 13 and 

 199. rVil/d. Sp. PL V. p. 118. Hook. Gard. Ferns, t. 2G. 

 Gymnopteris, Pr. Fee, Acrost. p. 8G. t. 46. Anapausia, Pr. 

 Moore. Chrysodiuin, Metten. Acrost. acuminatum, in/ld. 

 I. c. p. 111. Gymnopt., Pr. Fee, Acrost. p. 85. Anapausia, 

 Moore. — Plum. Fit. p. 100. /. 115. 



Ilab. Tropical America, especially the West Indian Islands, Bi-azil, and British 

 Guiana. — Tlie S|)ecies varies in the shape of the sterile pinniB, especially of the ter- 

 minal one, sometimes almost rhomboid, and in the size of the ultimate areoles, 

 and in the more or less copious free veinlets. Hence Willdenow and Fee have 

 constituted two species. 



155. A. (Gymnopteris) subrepanduni. Hook. ; caudex 

 cree])ing stout, stii)ites a span to a foot or more long palea- 

 ceous with coarse black subulate deciduous scales, fronds 

 1-H foot long coriaceo-membranaceous almost brown when 

 dry paler beneath simple or pinnated (terminal pinna i)etio- 

 late and laru;er), pinnre 3-13 (j-19 inches long 1-2 inches 

 wide oblongo-lanceolate acuminate subsessile obliquely cu- 

 iieate at the base quite entire or (in Cuming's pinnated spe- 

 cimen) repando-sublobate at the margin, costules distinct 



