45 
shape of middle pinnz and of pinnulz and segments it scarcely differs from D. ampla, 
in shape of basal pinnz, dark-coloured scales and venation it comes near to D, me- 
ridionalis; from both it differs by its dark-coloured stipe and rachises and vivid-green 
lamina. 
Rhizome decumbent, stout, densely clothed with large, glossy, castaneous, 
entire, lanceolate-acuminate scales. Stipes 50cm or longer, like main-rachis glossy, 
castaneous (rarely fusco-stramineous), glanduloso-puberulous by appressed, very 
short, cylindrical hairs, pale with age and deciduous, and furnished with deci- 
duous scales, similar to those of the rachis and becoming smaller upwards. 
Lamina deltoid or deltoid-ovate, up to 1 m high and nearly as 
wide, herbaceous, vivid green, tripinnatifid at middle, tripinnate- 
. quadripinnatifid, sometimes quadripinnate at base. Pinnz at di- 
stances of 8—10 cm, subopposite, on rather long stalks (those of 
larger pinne 3—4 cm long), basal ones rather the largest, often 
more than 40 cm long, their lower side slightly produced and their 
basal, basiscopic pinnula about equal in length to the next, some- 
times a little longer but also shorter. Middle pinne nearly of same 
width throughout below the acuminate apex. Secondary pinnules 
at distances of about 2 cm, oblong-acuminate, about 6 cm long, 
2—2'2 cm broad, those of the lower half of the pinne short- 
Stalked, the upper broadly adnate at the posterior base, the upper- - 
most decurrent and confluent, larger ones fully pinnate at base, 
most of them incised nearly to the midrib into about 10 pairs of 
close, suboblique, subacute or obtuse, oblong lobes, 1—1'/: em 
long, 4 mm broad, with serrate margins. — Midribs of pinne 
castaneous, glanduloso-puberulous and beneath sparsely paleaceous 
like the rachis. Both surfaces with scattered, appressed, very short Hic 7 D. Griatgchit 
cylindrical hairs, the midribs and larger veins above rusty-pu- (Bak.) O. Ktze. Secon- 
berulous by articulated Ctenitis-hairs, beneath with rather few small, "dary pinnula, nat. 
brown lanceolate or ovate-lanceolate scales. Veins of tertiary seg- size, segments >< 2. 
ments pinnate; ultimate veins terminating short within the margin, 
generally simple; midvein of the basal anterior tertiary segment of an upper secon- 
dary pinnule, which is broadly adnate to the midrib of the pinna, springs always 
from the midrib of the secondary pinnula, a little above its base (compare 
D. meridionalis). Sori small, medial on the veins generally confined to the lower 
two-thirds of the pinnz. Indusia small, pale, very thin and fugacious. Spores echinate. 
Cuba orient. Wrignt nr, 1055 (B, W, S$). 
Jamaica, Jenman (B, W) Hart nr. 115 ¢(W); lower slopes of Mt. Moses, Maxon nr. 1067 (W), Clyde 
Stream and Dollwood D. Watt nr. 62, 157 (RB), near Cinchona, G. L. Fiscner (R, RB). 
