New ferns from tropical America—ll 
MARGARET SLOSSON 
(WITH PLATE 3) 
The two species of Dryopteris here described for the first time 
belong to the group of D. pubescens. Both are from Jamaica, 
and each bears a most curious and misleading resemblance to the 
other. 
For the privilege of describing the first I am indebted to the 
kindness of Mr. William R. Maxon. This species is based on a 
single sheet, representing a rootstock and three leaves, two de- 
tached, originally from the Jenman Herbarium, labelled Nephro- 
dium luridum Jenman, in Jenman’s hand. It may be described 
as follows: 
Dryopteris lurida (Jenman) Underwood & Maxon sp. nov. 
Nephrodium luridum Jenman MS. 
Rhizome creeping, furnished with blackish rigid lanceolate or 
lance-linear acuminate scales up to 6 mm. long, with occasional 
unicellular gland-like processes and jointed cilia on their margins; 
similar scales on bases of the stipes; fronds clustered, pubescent, 
glandular throughout with capitate, often long-stalked and jointed, 
sometimes forked glands; stipes slender, up to 31.5 cm. long, dark 
brown at base, upwards brownish or stramineous or greenish, 
grooved on face; laminae up to 25 cm. long, up to 16.5 cm. broad, 
green, tinged with olive, ovate-deltoid, tripinnate, abruptly nar- 
rowed above at about the third or fourth pair of pinnae, their 
apices acute or acuminate, serrate, giving rise gradually to the 
pinnae and pinnules; pinnae alternate or opposite, oblique, 
stalked, mostly asymmetrical, those above the basal mostly 
ovate-lanceolate to oblong-lanceolate, the second or third pair often 
subequilateral, those above somewhat cut away beneath at base, 
the basal pair broadly deltoid or ovate-deltoid, up to 9 cm. broad 
at base, its inner inferior 2-5 pinnules on either side much longer 
than the corresponding superior ones and sometimes subbipinnate 
at base; other pinnules parallel with or overlapping the costa on 
the inner side, somewhat cut away beneath at base, acute, the 
larger stalked and obliquely pinnatifid into serrate or entire lobes, 
(183 
