83 
The most distinct species among the numerous Brazilian forms allied to 
D. subincisa, It differs from all those, as well from D. subincisa and other andine 
species by its firm, chartaceous lamina, which as more or less shining, darker 
above, pale-green beneath, by its more lengthened and narrower tertiary segments, 
which are bluntly and often equally rounded at the apex, or the larger ones some- 
what narrowed upwards and bluntly crenate at both edges, not serrate, by its supra- 
medial sori and by its pubescence and scales. Costules and veins above with some 
scattered long setz, long hairs elsewhere absent, but the costules beneath are very 
finely or rather densely puberulous. Basal scales large, lanceolate, castaneous, rigid 
subentire or very faintly toothed; similar but smaller scales are scattered along the 
rachis and cost beneath; coste of the upper, smaller pinne and costule beneath 
with several small bright-brown or reddish-brown, ovate or ovate-lanceolate, entire, 
scales. The veins are forked and the shorter anterior branch produces a sori near 
its apex close to the crenature of the margin. Only the uppermost pinnulae are 
adnate at the posterior base, scarcely decurrent, and the midvein of an adnate 
segment always springs out from the costula, as a rule a little above its base. 
The above characters make this species very different from all other species 
allied to D. subincisa; it has some resemblance to D. crenulans in habit and by its 
peculiar reddish-brown ovate scales of the costules beneath and also in its short 
pubescence, but the basal scales are different and the sori are exindusiate; also the 
shining surface and firm texture are different. 
Brazil: Para, Martius (B) — Rio: Martius (B), Rrepet (B), Beyricu (RB), H. ScHEeNcK nr. 2941 (B, RB), 
Guaziou nr. 967 (H, Rg), 2395 (H), and others, — Sao Paulo, Rais da Serra, Wacker nr. 177 pt. (R). 
340. Dryopteris abundans Rosenstock, Hedwigia 46: 133. 1906. — Fig. 17. 
Syn. Dryopteris Martiana Rosenst. 1. c. 132 (excl. syn. et icon. cit.). 
Type from Brazil, leg. JirnGens nr, 195 (R!). 
Allied to D. macrosora but quite distinct. It is one of the largest and the most 
finely cut species of the whole group, nearly quadripinnate, quinquepinnatifid below. 
Middle pinnz 50 cm or more long, secondary pinnules nearly all stalked, 10—12 cm 
long, their apex long-acuminated, serrate or crenate; tertiary pinnules of the lower 
half of the secondary pinnules free, 2 cm long, 6—8 mm broad, shortly acute or 
subobtuse, incised nearly to the midrib into oblique, obtuse or truncate quaternary 
segments. Veins nearly or quite reaching the veins. — Basal scales large, up to 
3'/2 em long, 3 mm _ broad, castaneous, firm, glossy, entire at the lower part, 
retrorsely shortly dentate towards the acuminate apex. Scales of rachises and 
costules beneath very few, practically none, the few found ovate-lanceolate, dentate. 
Pubescence about as in D. macrosora, long hairs being found on the costules and 
veins above; costules and midribs beneath densely, and both surfaces, especially 
the lower one sparsely very shortly puberulous. — Sori small, supramedial. — 
Texture herbaceous, both surfaces dark-green, not shining. 
11" 
