270 ASPLENIUM, § AMSOGONIUM. 



Islands, Brackenridge. — That this is a polymorphous plant cannot be denied, but 

 the pinnaj vary as much in one and the same specimen as they do in different in- 

 dividuals : and I scarcely see the necessity for the numerous (six) varieties and 

 subvarieties indicated by Mettcnius. The species is readily recognized, if only 

 the nature of the venation be considered, coupled with the diplazioid sori and the 

 copiously bipinnate ramification, together with the numerous horizontal pinnules, 

 very uniform in general outline, — from a broad and often hastate truncated base 

 gradually diminishing in width to the apex. The margins, indeed, of the pin- 

 nules are singularly inconstant, variously serrated and lohed and pinnatifid. 



301. A. (Anisogonium) decussatum, Sw. ; caudex "erect 

 scaly," stipes stout 1-2 feet long deciduously scaly smooth 

 or muricated, fronds 2-4 feet long broad-oblong acuminate 

 subcoriaceous pinnated often -with scaly proliferous axillary 

 bulbs, pinnoe numerous large horizontally patent sessile 6-10 

 inches and more long often 2 inches broad sessile from a 

 broad truncated and subcordate and on each side subauricled 

 base oblong gradually narrower to the acute or acuminated 

 apex the margin entire or serrated or irregularly sinuato- 

 lobate rarely below again pinnate with oval-oblong acute 

 pinncB, terminal pinnae large hastato-triangular broad at the 

 base and pinnatifid with long segments entire or serrated 

 at the acuminated apex, veins copious fasciculato-pinnate 

 branches or veinlets uniting and anastomosing more or less 

 copiously, forming triangular areoles next the costae the rest 

 more or less elongated, sori upon all the veins and anasto- 

 mosing with them, involucres narrow mostly diplazioid. — Siv. 

 Syn. Fil. p. 76 and 260 {description excellent). JVilld. Sp. 

 PL v. p. 173. Metten. Asplen. p. 173. Anisogonium, Pr. 

 Tent. Pterid. p. 116. t. 4. / 13. Hook. Gen. Fil. p. 56. 

 (Tab. a./. 1-4.) Aspl. proliferum, Lam. Wall. Cat. p. 236. 

 Metten. Fil. Hort. Lips. p. 74. /. 11. /. 7- Diplazium, Petit. 

 Th. Kaulf. En. Fil. p. 182. Sieb. Syn. Fil. p. 30. D. bul- 

 biferum, BoJ. in Herb. Hook. D. horridum, Kze. Annal. p. 

 26. D. Swartzii, Bl. En. Fil. Jav. p. 191. D. repandum, 

 Bl. En. p. 191, and in Herb. Hook. Aspl. spinulosum, Bl. 

 En. Fil. p. 193 et in Herb. Hook, {stipes and rachis distinctly 

 muricate or aculeate) . Callipteris, /. Sm. Asplenium, Metten. 

 Asplen. p. 172. Diplazium accedens, Bl. En. p. 192. D. 

 incisum, " Schuhm. R. Dansk. Vidensk. Afhandl. iv. j)- 232." 

 Digrammaria robusta. Fee, Gen. p. 218. t. 18 B. 



Hab. Mauritius and Bourbon, abundant. Java, Bliime, Thos. Lobb. Isle of 

 Leyte, Cuming, n. 303 (very aculeate). Ternate, Moluccas, Blume. Borneo, 

 Motley, n. bib. Upper Assam, Griffith, Simons (more nicmliranaceous, veins less 

 regularly pinnate, but often irregularly anastomosing). Solomon's Group, S. 

 Pacific, Milne. Feejee Islands, Brackenridge (some pinna again pinnated at the 



