262 ACROSTICHUl 



Hab. India, probably throughout the hilly parts: Nilghiri, Bnddome ; Kumaon 

 to Sikkim and Boutan, Khasya, etc., JVaUich, Griffith, Hooker fil. and Thomson ; 

 Ceylon, Gardner, n. 1161, Moulmeine, n. 63, 3Jr. 0' Riley {Parish, n. 63, sterile 

 pinnae 8 inches, fertile 9 inches long, narrow-linear, sinnato-pinnatifid). — The 

 broad form which I had published as A. prolife7-um has generally the opposite 

 veins of the costules meeting at an angle or forming two angles, bearing one 

 or two included free veinlets, and seems to be found in the hotter parts of India : 

 Ceylon, Gardner, n. 1313 (with sterile pinnse almost coriaceous, 7-8 inches long, 

 more than 2 inches wide, very opaque ; fertile pinnae also in proportion large and 

 broad, the united veins forming a very acute angle and bearing a solitary free veinlet 

 throughout; probably a distinct species) ; Nilghiri, Beddome, n. 9 (fertile pinnae 

 5-6 inches long, almost filiform) ; Bombay, etc. Tropical Africa : Fernando Po 

 and Sierra Leone, Barter, Kendall. — I suspect most of the alxive forms must be 

 considered varieties rather than species, as myself and others had considered them, 

 for I find all kinds of intermediate states in the shape and size of the pinnules, and 

 assuredly great diversity in the venation. 



130. A. (Heteroneuron) costatum, Wall. ; caudex creeping 

 subulato-paleaceous, stipites 1-1^ and more feet long striated 

 and often here and there rusty-furfuraceous, fronds 1-1^ or 

 more feet long coriaceous or subcoriaceo- membranaceous very 

 pale-green pinnated, pinnae petiolate, of the sterile frond 

 7-10 inches long 1-2 inches broad oblong acuminate obtusely 

 and obliquely cuneate at the base entire sinuato-crenate at 

 the margin, costules horizontal, and costa prominent beneath, 

 primary veins arched and forming three or four or more 

 series (according to the breadth of the pinnae) of very irre- 

 gular but subtransverse large areoles, within which are lesser 

 deltoid areoles including two or more clavate free veinlets, 

 free veinlets also at the margin ; pinnae of the fertile fronds 

 generally smaller 2-3-6 inches long more coriaceous but 

 nearly of the same form wholly or partially soriferous, the 

 margin sometimes reflexed, costules very distinct and promi- 

 nent beneath, venation less compound. — Var. a, ruhicundum ; 

 pinnae very large subcoriaceous often finely acuminated 8-12 

 inches long frequently deeply tinged with purple-red wholly 

 soriferous beneath, fertile ones 6-9 inches long ^ an inch 

 wide. A. costatum, JVall. Cat. n. 26. Cyrtogonium, /. Sin. 

 Poecilopteris, Moore. Campium, Pr. — Var. /S, deltigerum ; 

 small, sori partial generally marginal and interrupted, spots 

 or masses forming transverse lines between the costules fre- 

 quently having a deltoid form. Meniscium deltigerum. Wall. 

 Cat. n. 59. — Var. 7, undulutum; resembling var. /3, but the 

 sori frequently only marginal, forming a broad band, but often 

 extending a little way down between the costules towards the 

 costa, the disk of the pinnule naked. Nothochleena undu- 



