36 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
dentally or perhaps subsequently, either by him or by Mr. Baker; and that Jiirgensen’s 
873 must stand as the actual type of the species. Baker in the Flora Brasiliensis! 
later modified the description and cited Brazilian specimens (Burcheil 2527 and Glaziou 
2420) in addition to the Mexican plant. The writer has not seen the Burchell plant; 
but Glaziow 2420, of which the National Herbarium has a fragmentary specimen, is 
much larger than the Mexican plant and represents a species of no particularly close 
alliance to it. Unless the Burchell specimen is of the same species as the Mexican 
which is exceedingly unlikely), the range of H. apiculata must include at present 
only Mexico, where, as it appears, the species has not been re-collected since Jiirgen- 
sen’s time. 
In several respects H. apiculata is unique, but especially in its pungent segments 
and in the position of the sori, the last a character which may be observed very well 
in plate 22. 
EXPLANATION OF PLATE 22.—Type specimen, Jiirgensen 873, in herb. Kew. Atabout two-thirds natural 
slze. 
10. Hemitelia subglabra (Underw.) Maxon, sp. nov, PLATE 19, B. 
Cnemidaria subglabra Underw. MS. 
Caudex unknown; frond 2 to 3 meters long; stipes rather stout, 60 em. or more long, 
olivaceous to pale brownish, scantily short-aculeolate, eventually tuberculate, very 
sparingly paleaceous, the scales with black centers and whitish erose margins; rachis 
similar, muricate toward the base, more or less deeply sulcate on all sides, scantily 
and deciduously paleaceous; pinne ample, subopposite, inserted 8 to 12 cm. apart on 
each side, oblong-lanceolate, 30 to 35 em. long, 7 to 10 cm. broad, divergent, sessile or 
short-petiolate, slightly narrowed at the rounded inequilateral base, deeply and 
subequally pinnatifid to within 3 mm. of the costa in the basal part, the costal wing 
gradually broader outward, 5 to 6 mm. wide on each side below the acute or short- 
acuminate apex; costa elevated on both surfaces, stout, glabrous and yellowish above, 
below closely invested with a minute whitish-arachnoid covering, soon glabrescent, 
toward the base bearing a few deciduous broad whitish darker centered coarsely erose 
flaccid scales; basal pinnz shorter and narrower, about 20 cm. long, strongly deflexed, 
the segments more or less unequal; segments of middle pinne about 20 to 23 pairs, 
linear-oblong, long-acuminate, 12 to 15 mm. broad at the slightly dilatate base, 8 to 12 
mm. broad at the middle, falcate toward the apex, separated by rather narrow acutish 
sinuses, the segments 3 to 6 mm. apart at their middle; margins plane or slightly 
revolute, subentire to lightly undulate-serrate, only the subcaudate apices con- 
spicuously crenate-serrate; costules prominent, similar to the cost, not paleaceous 
below; veins free, prominent, glabrous above, nearly so below, about 16 pairs below 
the apex of the segment, the lowermost one to three times forked (the basal branch 
strongly arcuate, extending to the sinus, soriferous about midway between the costa 
and sinus), those above mostly twice-forked near the base, oblique, the branches 
divergent, relatively distant, mostly soriferous (the middle one beyond the others), 
the large sori thus borne in an irregular nearly medial line falling short of the apex of 
the segment by 1 to 2cm., the individual sori approximate but usually not continuous; 
indusium membranous, semicircular, ample, 2 or 3-parted, the lobes large, bullate, 
with irregular margins; receptacle globose-capiiate, squamulose-pilose; leaf tissue as 
in H. arachnotidea. 
Type in the U. 8. National Herbarium, no. 575817, collected on a wet slope, in 
partial shade, vicinity of La Palma, Costa Rica, altitude 1,450 to 1,550 meters, May 6 to 
8, 1906, by William R. Maxon (no. 451). 
Known only from the interior mountain region of Costa Rica, at elevations of from 
1,185 to 1,550 meters, but apparently common. The following additional specimens 
are in the National Herbarium: 
Costa Rica: Same data of locality as the type, Maxon 382. Forests of Juan 
Vifias, Pittier 1837. La Palma, Tonduz 12532; Brade 102. 
‘Baker in Mart. Fl. Bras.12: 312. 1870. 
