568 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
synonym of P. thyssanolepis A. Br., a point noted by Christensen.’ The name 
paradorum would in any event be unavailable for the Mexican plant in the 
genus Polypodium, because of Polypodium paradorum Colenso, a New Zealand 
species described in 1882. 
10. Polypodium typicum Fée, Crypt. Vase. Brés, 2: 52, 1872-73. 
TYpr LOCALITY: Itatiaia, Brazil (Glaziou 5294). 
DIsTRIBUTION: Brazil. 
ILLUSTRATION : Fée, op, cit. pl. 96. f. 2; Lindm, Ark. for Bot. 1: pl. 11. f. 8. 
This species, which is perhaps not very common, was well illustrated by Fée, 
The scales of the under side are few, minute, scattered, linear or very narrowly 
lance-deltoid, only a few cells broad, pale yellowish brown, and retrorsely and 
irregularly erose-denticulate. The rhizome scales are about 2 mm, long, lance- 
deltoid, pale yellowish brown in mass (individual scales appearing lighter), and 
mostly with a pronounced median stripe of opaque dark brown cells, the mar- 
ginal part being whitish, irregularly lacerate, and composed of pale translucent 
cells. The scales of both the rhizome and the lamina are very different in 
shape and structure from those of P. pycnocarpum and several related species, to 
all of which P. typicum bears little more than a slight superficial resemblance. 
The following specimens are in the U. 8S. National Herbarium: 
Brazit: Lages, Santa Catharina, Spannagel (Rosenstock, no. 200). Alto do 
Serra, Sido Paulo, Wackeé (Rosenstock, no. 347). Terromecco, Rio 
Grande do Sul, Kunert 7. 
11. Polypodium bryopodum Maxon, sp. nov. 
Rhizome slender, firm, and wide-creeping, 5 to 10 cm, long and more, 1.5 to 2 
mm. in diameter, with a few short branches, conspicuously paleaceous, the 
scales imbricate, subappressed (their long, slender tips divaricate-secund), 
rather lax, 2.5 to 3 cm, long, long-acuminate or attenuate from a deltoid-ovate 
rounded base, dark brown in mass, nearly homogeneous, not bicolorous, com- 
posed of short to mostly elongate, distinctly luminate, polyhedral cells with dark 
reddish brown sclerotic partition walls, the outer cells smaller, paler, oblique to 
transverse, the margins obtusely subdenticulate, or sharply denticulate at the 
attenuate apices. Fronds erect, 0.5 to 4 cm. apart, 3.5 to 10 cm. long, the stipe 
usually longer than the lamina; stipe 2.5 to T cm. long, 0.5 to 1 mm. thick, 
stramineous, sparingly and deciduously paleaceous; lamina deltoid to deltoid- 
oblong, 2 to 4 em. long, 1 to 2.2 cm. broad at the base, obliquely pinnatifid nearly 
to the concealed or partially evident rachis; segments 8 to 6 pairs, unequal, the 
basal ones the largest, 7 to 138 mm. long, 3 to 4 mm. broad, linear-oblong, obtuse, 
slightly decurrent ; upper segments gradually shorter, finally evident as lobes of 
the short-acuminate apex; margins slightly cartilaginous, distinctly but shal- 
lowly crenate, the crenations 1.5 to 2.5 mm. long, nearly straight; midveins con- 
cealed ; veins 4 to 6 pairs in the larger segments, oblique, once or twice forked, 
mostly free; sori 3 to 5 pairs, medial or subterminal upon the proximal branches, 
large, contiguous, nearly covering the segments; sporangia glabrous, the annulus 
usually 16-celled; spores diplanate, granulose. Leaf tissue yellowish green, 
coriaceous, glabrous above, beneath distantly paleaceous, the scales persistent, 
appressed, dark brown, 0.8 to 1.5 mm. long, deltoid-ovate, acuminate to attenu- 
ate, subentire to obtusely erose-dentate, nearly homogeneous; cells widely 
luminate, the middle ones short, polygonal, with brown, strongly sclerotic parti- 
tion walls, the outer ones transverse and paler. 
*Ind. Fil. 851, 1905. 
