MAXON—-STUDIES OF TROPICAL AMERICAN FERNS. 37 
Superficially H. subglabra bears a certain resemblance to H horrida of the West 
Indies, which, however, is not free-veined; hence Mr. Pittier’s 1837 was so determined 
by Bommer. But there is no apparent reason for the previous determination of 
Tonduz’ 12532 as H. apiculata, except that the species of this group as a whole have 
been greatly neglected and the few names applied very loosely. Brade’s 102 bears 
the name Hemitelia grandifolia in Doctor Christ’s hand. The species is apparently 
very distinct from other members of the genus and finds its nearest ally in H. grandis, 
from which it may be distinguished by the key characters. 
EXPLANATION OF PLATE 19.—See p. 33. 
11. Hemitelia grandis Maxon, sp. nov. PLATE 23. 
Caudex aborescent, ascending, about 75 cm. long; fronds wide-spreading, about 
3 meters long; stipe stout, olivaceous to pale brown, freely short-aculeate on the 
convex lower side, sulcate above and bearing numerous lanceolate long-acuminate 
scales, 1.5 to 2cm. long, with shining dark brown centers and whitish scarious margins; 
lamina very ample, 120 to 140 cm. broad at the middle, very deeply bipinnatifid or 
(as to the largest pinne) fully bipinnate, the rachis very stout, short-aculeolate, 
muricate upward or smoothish, deciduously and closely whitish-araneose, sparingly 
paleaceous; pinne sessile, mostly alternate, lanceolate, the larger middle ones 75 cm. 
long, 20 to 22 cm. broad from the middle nearly to the rounded slightly narrower 
base, in the basal third cut to the costa and upward nearly to the costa, the costal 
wing 1 to 2mm. broad on each side at the middle of the pinna, 3 to 5 mm. broad on 
each side below the crenately lobed or ultimately crenate-serrate acuminate apex, 
the costa sulcate and glabrous above, below stout (2.5 to 3 mm. broad), convex, 
yellowish brown, smoothish, minutely and closely whitish-araneose and deciduously 
paleaceous toward the base, the scales ample, ovate, flaccid, dirty white, with darker 
bases; segments (or pinnules) of the larger pinne about 28 pairs, alternate, deltoid- 
lanceolate, falcate, the larger ones 10 to 11 cm. long, 2 to 2.3 cm. broad just above 
the obtusely cuneate adnate base, about 18 mm. broad at the middle (the inferior 
basal one about 6 cm. long), the sixth to the tenth pairs hghtly decurrent, beyond 
this connected by a conspicuous costal wing; all but the uppermost pinnules deeply 
crenate or crenately lobed (the lobes or crenations about 4.5 to 6 mm. broad, mostly 
shorter than broad), gradually serrate-crenate toward the linear-caudate apex, the 
costules glabrous above, below whitish-araneose, glabrescent; veins all free, about 
20 pairs, divergent, slightly elevated, glabrescent, with about 4 to 8 pairs of very 
oblique, mostly simple pinnately arranged branches, these appressed-setulose below 
and soriferous below their middle (or the upper ones soriferous close to the vein), 
the rather large sori thus borne in distinct but contiguous rounded-angular groups 
(comprising 4 to 8 pairs of sori each) in a nearly medial zone between the costule and 
the crenate margins; indusia very ample, membranous, 2 or 3-lobate, the lobes irregu- 
larly erose, spreading with age and shallow; receptacle elongate-capitate, setiferous; 
leaf tissue rigidly herbaceous, very dark green and lustrous above, sublustrous and 
much paler below. 
Type in the U. 8. National Herbarium, nos. 575746 and 575747 (comprising a large 
middle pinna in two sections), collected in a humid forest ravine, vicinity of Coli- 
blanco, lower slopes of the volcano Turrialba, Costa Rica, altitude about 1,950 meters, 
April 30, 1906, by William R. Maxon (no. 307). 
To be compared only with /. subglabra, from which it differs for the most part in 
those characters which would naturally be correlated with its much greater size. 
The pinnate arrangement of the ultimate veins is a noteworthy character, Additional 
Costa Rican specimens (without definite locality), collected by Wercklé, have been 
received from Doctor Christ under the names H. horrida and //, apiculata. The species 
was collected in Costa Rica also by J. J. Cooper and determined by Baker as /. horrida. 
EXPLANATION OF PLATE 23.—Section from lower third ofa large pinnaofthe typespecimen. Natural size. 
