171 223 
Nephrodium dissidens Hk. sp. 4: 66. 1862. Hk. Bak. Syn. 295. 
Dryopteris dissidens O. Ktze. Rev. 2: 812. 1891; Urban, Symb. Ant. 4: 19. 1903. 
Nephrodium jamaicense Bak.; Jenm. Journ. Bot. 1877: 264. Bull. Dept. 
Jam. n.s. 3: 163. 1896. 
Dryopteris jamaicensis C. Chr. Index 272. 1905. 
Nephrodium asplenioides Bak. Syn. 295 (part?). 
Aspidium Sintenisii Kuhn et Christ.; Krug, Engl. Jahrb. 24: 119. 1897. 
Dryopteris Sinlenisii Urban, Symb. Ant. 4: 19. 1903; C. Chr. Ind. 293. 
T y pe from Cuba leg. PoEPPrG (specim. auth. vidi in Herb. Berol. et Herb. PRESL). 
A distinct but very misunderstood species, by METTENIUS considered the most 
developed form .of his A. scolopendrioides, while Baker (Syn. Fil. 293) very im- 
properly referred it to his Nephrodium asplenioides. As the above list of synonyms 
shows, the species has been described under at least three new names, of which 
A. dissidens was placed in Syn. Fil. under the subgenus Pleocnemia (!). It is beyond 
question that the forms referred by me to D.sclerophylla are closely related when 
not absolutely identical. The main-characters of the species are 1) the coriaceous 
or papyraceous texture of the lamina, which is of a characteristic grey colour due 
to the dense pubescence of stellate hairs throughout both surfaces, 2) the thick, 
undulato-crenate margins of the teeth or lobes, which generally seem to be acute 
or even mucronate because the margins of the lobes are revolute, 3) the prominent 
veins, 4) the supramedial or even submarginal sori, and 5) the glabrous sporangia. 
The erect or oblique rhizome is at the top densely clothed with red-brown 
or nearly black, glossy, stellato-pilose scales. The lamina varies in size and degree 
of cutting but it is always fully pinnate from base to the middle. The basal pair 
of veins is always truly anastomosing. Sori with a distinet, stellato-pubescent in- 
dusium. I can distinguish two forms. 
l. (typical sclerophylla). Leaves on short stems, long and gradually narrowed 
below. Pinnz short (3 cm > ?/:cm) the lower ones gradually smaller almost as in 
D. opposita, the fully developed ones sessile with a subcordate base, the upper ones 
confluent all broadly serrate, scarcely pinnatifid. Veins simple; sori medial. Scales 
of rhizome few, brown. 
Cuba: PoErricG (B, hb. Presi) — Prov. Habana, BAkER and O’Donavan nr. 4135 (W); BAKER nr. 1888 
(W) — Prov. Pinar del Rio, ParMER and HiLEv nr. 230, 227, 391, 533 (W); Baker nr. 3797 
(W) — v. HERMANN nr. 2185, 3256 (W) —.Prov. Oriente, WricuT nr. 1005 (B, S), 3923 (B, W, S) 
Maxon nr. 4447 (W) — Prov. Santiago, PoLLArp and E. and W. ParMER nr. 41 (W). 
2. Leaves on longer stems, ovate or elliptic, shortly narrowed downwards. 
Pinnz short-stalked or sessile with cordate base, up to 8 cm long, 1?/1—2 cm broad, 
pinnatifid to a narrow wing to the costa. Veins pinnate in the lobes, often furcate 
and forming costular areoles, very prominent beneath. Sori supramedial or sub- 
marginal. Scales of rhizome nearly black, 2 cm long, glossy. 
Cuba: Prov. Habana, WILson nr. 671 (W), Curtiss nr. 592 (H, W), — Prov. Pinar del Rio,PALMER and RILEY 
nr. 126, 223, 567 (W) — Prov. Oriente, WnicuT nr. 1001 pt. (S, W). Maxon nr. 4389, 4422 (W), 
EaGers nr. 4941 (Bj. 
29* 
