270

ASPLENIUM, § ANISOGONIUM.

Islands, Brackenridge. —That this is a polymorphous plant cannot be denied, butthe pinnse 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 andsubvarieties indicated by Mettenius. The species is readily recognized, if onlythe nature of the venation be considered, coupled with the diplazioid sori and thecopiously bipinnate ramification, together with the numerous horizontal pinnules,very uniform in general outline,—from a broad and often hastate truncated basegradually diminishing in width to the apex. The margins, indeed, of the pin-nules are singularly inconstant, variously serrated and lobed and pinnatifid.

301. A. (Anisogonium) decussatum, Sw. ; caudex “erectscaly,” stipes stout 1-2 feet long deciduously scaly smoothor muricated, fronds 2-4 feet long broad-oblong acuminatesubcoriaceous pinnated often with scaly proliferous axillarybulbs, pinnse numerous large horizontally patent sessile 6-10inches and more long often 2 inches broad sessile from abroad truncated and subcordate and on each side subauricledbase oblong gradually narrower to the acute or acuminatedapex the margin entire or serrated or irregularly sinuato-lobate rarely below again pinnate with oval-oblong acutepinnse, terminal pinnse large hastato-triangular broad at thebase and pinnatifid with long segments entire or serratedat the acuminated apex, veins copious fasciculato-pinnatebranches or veinlets uniting and anastomosing more or lesscopiously, forming triangular areoles next the costae the restmore or less elongated, sori upon all the veins and anasto-mosing with them, involucres narrow mostly diplazioid.— Sw.Syn. Fil. p. 76 and 260 ( description excellent). Willd. Sp.PI. v. p. 173. Metten . Asplen. p. 173. Anisogonium, Pr.Tent. Pterid. p. 116. t. 4. f. 13. Hook. Gen. Fit. p. 56.(Tab. A.f. 1-4.) Aspl. proliferum, Lam. Wall. Cat. p. 236.Metten . Fil. Hort. Lips. p. 74. t. 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. Jan. 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 distinctlymuricate or aculeate ). Callipteris, J. Sm. Asplenium , Metten .Asplen. p. 172. Diplazium accedens, Bl. En. p. 192. D.incisum, “ Schuhm. 11. Dansk. Vidensk. Afhandl. iv. p. 232.”Digrammaria robusta, Fee, Gen. p. 218. t. 18 B.

Hab. Mauritius and Bourbon, abundant. Java , Blume, Thos. Lobb. Isle ofLeyte , Cuming , n. 303 (very aculeate). Ternate, Moluccas , Blume. Borneo ,Motley , n. 575. Upper Assam, Griffith, Simons (more membranaceous, veins lessregularly pinnate, but often irregularly anastomosing). Solomon’s Group, S.Pacific, Milne. Feejee Islands, Brackenridge (some pinnae again pinnated at the