260 ACROSTICHUM, § HETERONEURON. 



margin more or less spinuloso-setiferous, venation manifest, 

 costules remote, veins anastomosing and forming two series 

 of costal areoles and one rarely two series of costular ones, 

 no included free veinlets, veinlets next the margin free ; 

 fertile fronds oblong, pinnae very much contracted oblongo- 

 lanceolate pinnatifid. — Gaud. Voy. de VUranie, p. 307- t. 3. 

 Heteroneuron, Fee, Acrost. p. 96. Poecilopteris, Moore. 

 Pr. Cyrtogonium laciniatum, /. Sm. [name only). Hetero- 

 neuron argutum, Fee, Acrost. p. 96. t. 2b. f. 2 [apparently a 

 young and vei^y imperfect state of this species) . 



Hab. Moluccas, Gaudichaud. Island of Leyte, Cuming, n. 294, 237, and 2G1 

 (very young and imperfect).— Allied to A. repandum, Bl., but, I think, very dis- 

 tinct. Heteron. arguium of Fee, if not a very young state of this plant, is too 

 imperfectly known to justify its being made a species. 



128. A. (Heteroneuron) repandum, Bl. ; caudex creeping, 

 stipites a span to a foot and more long generally longer of 

 the sterile fronds, fronds 1-2 feet long ; sterile ones firm- 

 membranaceous ovato-oblong acuminate pinnate, pinnse 4-6 

 inches long \-\ inch broad more or less petiolate lanceolate 

 or oblongo-lanceolate pinnatifid generally halfway down to 

 the costa with ovato-rotundate sub falcate lobes having rather 

 broad sinuses serrated at the margin and generallj' bearing 

 one or more rarely two spinulose subulate setse in the si- 

 nuses similar to what are seen in those of Egenolfia, terminal 

 pinna the longest more deeply pinnatifid with longer seg- 

 ments and often prolonged, caudato-attenuate to the length 

 of a foot and proliferous towards the apex, venation mani- 

 fest, costules remote connected near the base by a transverse 

 arched vein forming a series of elongated costal areoles, 

 other veins form two or three smaller and more square- 

 shaped costular areoles, the rest being free, free included 

 veinlets none ; fertile fronds oblong, the pinnse much smaller 

 and contracted coarsely crenato-pinnatifid. — Bl. Fil. Jav. p. 

 39. t. 14 and 15 [and A. proliferum, E71. Fil. Jav. p. 104). 

 Cyrtogonium, /. Sm. Poecilopteris, Pr. Moore. Hetero- 

 neuron, Fee, Acrost. p. 96. ^.58 [sterile pinnce scarcely pin- 

 natifid). Cyrtogonium sinuosum, /. Sm. [name only). He- 

 teroneuron, Fee, Acrost. p. 95. t. 55. /. 2. Pcecilopteris 

 sinuosa and cuspidata, Moore. Acrost. loncophorum, Kze. in 

 Schk.Fil. Suppl. p. 5. t.2 [very good, but venation inaccurate) . 

 Pleteroneuron, Fee, Acrost. p. 94. Pcecilopteris, Moore. 

 Cyrtogonium palustre. Brack. Fil. U. S. Expl. Exp. p. 86. t. 

 12 [very good, particularly the venation). 



