406 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
relatives by the characters given in the key herewith. The figures published by 
the writer do not show any of the minute, bristle-like hairs which occur sparingly 
near the apices of the triangular lobes of the blade. Besides being few and very minute 
these are caducous. 
6. Polypodium wittigianum (Iée & Glaz.) Christ, Bull. Herb. Boiss. II. 2: 368. 
1902, as to name. 
Grammitis wittigiana Fée & Glaz.; Fée, Crypt. Vasc. Brés. 2: 50. 1872-73. 
Grammitis muscosa Fée, Crypt. Vasc. Brés. 2: 51. 1872-73. 
TYPE LOCALITY: Itatiaia, Brazil, alt. 2,300 meters (Glaziou 5300). 
DisTRIBUTION: Known only from Brazil. 
ItLustRATIONS: Fée, op. cit. pl. 95. f. 1 (as G. wittigiana),; op. cit. pl. 95. f. 2 
(as G'. muscosa). 
Hieronymus’s contention ! that Grammitis muscosa represents a depauperate condi- 
tion of the species described as G. wittigiana appears, from an examination of the 
type specimens of both, to be correct. Polypodium wittigianum as understood by 
Christ in 1902 included Schwacke’s no. 839 from Brazil; but this, as represented in 
the Berlin herbarium, is P. schenckii, Ule’s no. 4519, also cited by him, has not 
been seen. 
There is a single additional collection in the U. 8. National Herbarium, representing 
the smaller form of the species (described as G. muscosa). 
Braziu: Pico Redondo, Retiro, Itatiaia, alt. 2,450 meters, June 29, 1902, 
Dusén 773, 
EXCLUDED SPECIES. 
PoLyPoDIUM scHENCKII Hieron. Hedwigia 44: 87. 1905. 
TyPE Locauity: Serra do Mar, near Joinville, province of Santa Catharina, Brazil 
(Schenck 1243). 
DistRIBUTION: Known only from Brazil. 
Polypodium schenckii, though placed by Hieronymus with “‘P. serrulatum” and its 
allies, must be excluded from this group on account of its forked veins and ciliate 
rhizome scales. Besides the three collections cited by Hieronymus, the writer has 
examined specimens collected near the type locality by Schmalz (distributed by 
Rosenstock under no. 139) and Glaziou’s no. 7491. The latter, as stated on page 
403, was referred to P. myosuroides by Hieronymus. 
NEW SPECIES OF POLYPODIUM. 
In the course of studying certain American species of Polypodium 
the following have been distinguished as new. The first five are mem- 
bers of the group of P. trichomanoides, taken in a broad sense, of which 
the writer purposes to publish a synoptical review shortly. 
Polypodium hyalinum Maxon, sp. nov. 
Rhizome ascending, slender, about 1 cm. long, 1.5 mm. in diameter, freely radicose 
below, the apex crowned with a conspicuous tuft of fulvous scales, these linear- 
lanceolate from a slightly broader cordate base, 2.5 to 4 mm. long, 0.5 to 0.7 mm, 
broad near the base (here 9 to 13 cells broad, the cells relatively large, irregularly 
oblong, with slightly thickened fulvous partition walls), sometimes bearing a few 
small, irregular, simple or forked, gland-tipped processes near the base, the apical half 
of the scale invariably provided with straight or slightly curved, divergent unicellular 
hyaline acicular cilia. Fronds 4 to 7, suberect, fasciculate, 8 to 13 cm. long; stipe 
subterete, brownish stramineous from a darker base, 5 to 10 mm. long, thickly beset 
1 Op. cit. 89. 
