ASPLENIUM, § IIKMIDICTYIJM. 271 



l)ase). New Ireland, Ilindes. Tobie Island, Barclay. W. Tropical Africa, Curror. 

 Fernando Po, Voyel, Nitjer Erped. n. 130 (stipes and racliis ninricated), liarfcr. 

 — This is a noble sjjecies, and seems widely distributed, and, as is then generally 

 the case, trifling vjirieties are unnecessarily multiplied into species. The ninri- 

 cated character of the stipes and rachis is common even to the Mauritius form. 

 The Diyrammaria robusta is merely a luxuriant state, having some of the pinna; 

 again |)innate below, the rest deei)ly pinnatifid, and is seen on specimens from 

 Uourbon (whence I have piun?e of the kind 18 inches long), the Mauritius, and 

 in the Pacific Islands, found by Brackenridge and Milne.* 



E. Hemidictyum. — Sort very long, naked, anplenioid {single). Veins anastomosing 

 towards the margin. — Hemidictyum, Pr. (Hook. Gen. Fil. t. 55. J.) Asple- 

 nidictyon, J. Sm. Ceterach (Hook. Gen. Fil. t. G3 ^1). 



( Veinlets at their apices combined with a continuous, transverse, marginal vein. 

 — Gen. Hemidictyum, Pr.) 



302. A. (Hemidictyum) marginatum, L. ; glabrous, caudex 

 erect short thick rooting subarboreous, stipites stout 2-3 feet 

 hing subulate paleaceous below, fronds ample 4-6 feet long 

 membranaceous pinnated, pinnte 1 2-18 inches long 3-4 inches 

 wide broad-oblong shortly acuminate sessile auriculato-cordate 

 and crenato-sinuate at the base, costa stout, veins horizontally 

 patent forked free below towards the margin copiously ana- 

 stomosing and forming subhexangular network near the mar- 

 gin, the veinlets uniting with a transverse continuous vein 

 just within the margin, sori copious linear verv long parallel 

 free.— Li/m. Sp. PL p. 309. Sio. Syn. Fil. p. 76. Wi/ld. Sp. 

 PL p. 309. Hook. FiL Exot. t. 63. Metten. Asplen. p. 170. 

 A. limbatum, Willd., and A. Mikani, Pr. Hemidictyum mar- 

 ginatum, Pr. Tent. Pterid. p. 111. t. 3. /. 24. Hook. Gen. 

 FiL t. 55 A. H, Peruvianum, Pr. Epimel. Bot.p.'JA. Plum. 

 FiL t. 88. /. 106. 



Ilab. One of the finest and most common of tropical American Ferns, espe- 

 cially in the West Indian Islands, on the borders of streams, and in damp, moist, 

 and shady woods. On the continent of S. America it is perhaps less abundant. 

 We possess it from Brazil, Raddi, Gardner, w. 31. Venezuela, Funck, n. 77 ; 

 Fendler, n. 1G7. Tarapota, Eastern Peru, Spruce, n. 4783. 



{Terminal veinlets at the apices free, or rarely connected at the 7nargin. — 

 Gen. Asplenidictyon, J. Sm.) 



303. A. (Hemidictyon) Finlaysonianum, Wall. ; caudex 



* Dubious species of this Anisogonium- (or Cal/ipteris-)gTou]), at least referred 

 to it by Mettenius, are as follows : — Diplaziuni spinosum, Bory. Sandwich Islands. 



Asplenium Luzoniense, Spr. Luzon. Diplaz. fra.iinifoUum, Pr. (not 



Wall.). Luzon. Diplaz. serratum, Scliuhm. W. Africa. Probably Aspl. de- 



cussatum. Diplaz. undulosum, Sw. ; Sw. Syn. Fil. p. 92, 284. Martinique. 



Diplaz. heteropteron, Kze. Ceylon, Gardner, n. 35. Asplen. Manileu-se, 



Spr. Manila. 



