39. 
4. f. portoricana. — Scales of midribs of pinnz not bullate, from a somewhat 
broader base linear-acuminate, scarcely iridescent, dark-brown; indusia minute. 
Lamina rather glandular, often larger than other forms. 
Porto Rico, SInTENIS nr. 6251, 6400 b (B), 5454 (RB, W, not B), 6325 pt., 5947 (B), Gundlach 1398 (B). 
Most of these specimens are a mixture of D. hirta and D. nemorosa. — UNpERWoopD and 
Griacs nr. 815 (W): Hioram nr. 168 (W); Exiz. G. Brirron and DELLA W. MarsLe nr. 801 (W). 
305. Dryopteris crystallina (Kunze) Maxon in C. Chr. Ind. 259. 1905. 
Syn. Polypodium crystallinum Kunze, Farrnkr. 2: 85 tab. 135, 1851. 
_ Cystopteris brevinervis Fée, Gen. 300, 1850—52; 7. mém. 65 tab. 26 fig. 2. 1857. 
Aspidium hirtum var. Mett. Aspid. 114. 1858, et auctt. 
Type from Cuba, leg. Linpen nr. 1876 (cotype in RB!). 
A beautiful series of specimens of this little fern gathered in recent time prove 
that it must be considered a valid species, different from D. hirta by its habit. — 
The very thin lamina’ is oblong, rarely ovate-oblong in outline, 10—20 cm long, 
4—6 cm broad, tripinnatifid or tripinnate below. Pinnz remote, the lower ones at 
distances of up to 5 em, long-stalked, all but the uppermost ones deltoid, obtuse. 
Lower secondary pinnules deltoid, tertiary segments ovate, broadly obtuse, 2—4 mm 
long and broad. In minute characters the species scarcely differs from the Cuban 
form of D. hirta. Scales of the midribs of the pinnz beneath ovate-acuminate iridescent, 
those of the midribs of secondary pinnz bullate, iridescent, few. Ultimate veins not 
nearly reaching the edge. Sori small; indusia very minute, fugacious, not always found. 
Cuba: Oriente, Mt. Libano, LinpeN nr. 1876 (RB) and Maxon nr. 4241 (W, RB); Wricur nr. 1015 
(B, S, W); Loma del Jaguey, Eccers nr. 4926 (B, RB, W): near Jaguey, Yateras, Maxon nr. 4107, 
4151 (W); Finca Las yee Maxon nr, 4488 (W); El Yunque, Mt. Baracoa, UNDERWOOD and 
EarRLE nr. 961 (RB, H, W); La Perla, pupae nr. 8504 (W), 8891 (B, W). 
Jamaica: Below John Crow Peak, W. Harris nr. 7335 (B) — a somewhat evaricaien form, it may 
be a juvenile D. hirta. — 
307. Dryopteris oophylla n. sp. 
Type from Jamaica leg. Maxon nr. 1931 (CC. also W, RB, Rg). 
Closely related to D. hirta, with which species it was hitherto confounded; by 
Jenman (Bull. Dept. Jam. n. s. 3: 94) it was considered a large state of D. hirta. | am 
convinced, however, that it is a fixed species, at least, if one prefers, a ‘subspecies 
of D. hirta. It differs from that species by the following characters: 
. Leaf larger, up to 20—25 em high on a stipe 20—30 cm long, ovate, not 
deltoid, 10—12 em broad‘ at base, erect, rather firm tripinnate-tripinnatifid. Basal 
pinnz with the lower side somewhat produced. Secondary pinnulz of middle pinnz 
generally less deeply cut than those of D. hirta, although they are larger, their lobes, 
