46 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
a point on the costal wing usually about one-third the distance from costa to sinus, 
there meeting obtusely the sori of the adjacent segment; indusium membranous, 
yellowish brown, semicircular or dimidiate, subentire to deeply and irregularly cre- 
nate, repand, shallow; receptacle globose-capitate, setiferous; leaf tissue herbaceous, 
dark green and lustrous above, yellowish and much paler below. 
TypPE LocaLiry: Martinique, Sieber (Fl. Mart. 375), 
DisrriputTion: Mountains of Martinique and Guadeloupe, at from 500 to 1,480 
meters elevation. 
Intusrrations: Plumier, Traité Foug. pl. 26; Petiver, Pter. Amer. pl. 2. f. 10; 
Presl, Tent. Pterid. pl. 1. f. 18; Hook. Sp. Fil. 1: pl. 14 B (as H. grandifolia). 
Plumier’s plate 26 above cited was mentioned by Willdenow as illustrating his 
grandifolia; but, as shown under the discussion of that species at page 42 
H. grandifolia is preferably to be interpreted by means of the Willdenow typp speci- 
men, which is of the species known hitherto as /. insignis or H. imrayana. 
On account of the white scales of the under surface, larger specimens of this species 
might be confounded with true H. grandifolia, except for the simpler venation and 
the obtuse or, at least, nonacuminate segments. Its white scales will at once dis- 
tinguish it from #. obtusa which invariably has brown scales, and these of a very 
different character. 
EXPLANATION OF PLATE 26.—From a photograph of a portion of Sieber 375, Martinique, the type collec- 
tion. Natural size. (Specimen in herbarium of the Missouri Botanical Garden.) 
21. Hemitelia obtusa Kaulf. Enum. Fil. 252. 1824. 
Cnemidaria obtusa Presl, Tent. Pterid. 57. 1836. 
Hemistegia obtusa Presl, Abh. Bohm. Ges. Wiss. V. 5: 355. 1848. 
Hemitelia bullata Christ, Bot. Jahrb. Engler 24: 81. 1897. 
Rhizome of mature individuals unknown, probably ascending or forming a short 
upright caudex; fronds apparently 2 to 2.5 meters long, the stipe stout, clothed at 
the base with bright yellowish brown linear-lanceolate long-acuminate scales, sharply 
short-aculeate, hght castaneous to yellowish brown, muricate upwards, deciduously 
paleaceous; lamina broadly oblong or ovate-oblong, apparently 1 to 1.5 meters long, 
40 to 60 cm. broad, abruptly acuminate, bipinnatifid, the rachis stout, deeply sulcate 
and glabrescent above, below lightly and obtusely sulcate, smoothish, laxly yellowish- 
pubescent with long flexuous flaccid hairs; pinnzee numerous, close, the lower 
ones deflexed; middle pinnze divergent, opposite or subopposite about 4 to 6 em, 
apart, oblong-ligulate, 20 to 35 cm. long, 3 to 4 (rarely 4.5) em. broad, not or scarcely 
narrower at the base, close to the rachis at the upper side, subcordate below and com- 
monly overlying the rachis, sessile, straight or lightly falcate, gradually acuminate 
in the apical third or fourth, (the extreme apex sharply serrate,) pinnatifid two- 
thirds to three-fourths the distance to the costa, the costal wing about 3 to 5 mm. 
wide on each side or slightly broader toward the apex; coste glabrous and minutely 
but sharply sulcate above, below yellowish to brownish, stout, conspicuously ele- 
vated, at first freely clothed (at least toward the base) with shining subbullate ovate 
or oblong-ovate ferruginous or yellowish brown flaccid scales with lighter fibrillose 
margins, some of the scales persistent at the sides; segments about 24 to 30 pairs, 
oblong, lightly falcate, 9 to 12 mm, broad at the base, mostly close, the sinuses narrow 
and sharply acute, or broader in drying and acutish, the margins usually revolute, 
lightly crenate-serrate above the sinus, toward the apex crenate-dentate, the teeth 
not prolonged; costules sharply elevated, glabrous above, below obscurely setulose- 
glandular and bearing numerous small bullate brownish fibrillose scales; veins 13 to 
16 pairs, elevated, glabrous above, minutely glandular-setulose below, once-forked, 
the basal one having its basal branch connected with a similar branch from the adja- 
cent segment by a short transverse veinlet, the costal areole very narrowly elongate, 
ull four branches extending to the sinus or to a point immediately above; second 
