. 
MAXON—STUDIES OF TROPICAL AMERICAN FERNS, 413 
Type in the U. S. National Herbarium, no. 697769, collected at the extreme summit 
of El Yunque Mountain, Porto Rico, altitude about 1,110 meters, March, 1912, by 
Brother Hioram (no. 348). 
This new member of the genus Psilogramme is one of a small group of species in 
which the veins do not reach the margin, and of a still smaller section characterized 
by having several veinlets to each ultimate segment. Out of the 4 or 5 species com- 
prising this last subgroup it is related at all closely only to P. hispidula (Klotzsch) 
Kuhn, a South American species which is known to the writer from Kunze’s illustra- 
tion ! and asingle Colombian specimen in the U. S. National Herbarium. Psilogramme 
portoricensis is about one-third the size of P. hispidula and differs widely otherwise in 
the shape and subdivision of its pinne and in its much more copious hispid covering 
throughout, particularly upon the lamina. 
EXPLANATION OF PLATE 15.—Type specimens of Psilogramme portoricensis. Natural size. 
A NEW SPECIES OF HEMITELIA, SECTION CNEMIDARIA, 
FROM PANAMA. 
A further examination of material collected in Panama has led to 
the conclusion that the form here described is entitled to recognition 
as distinct from the species previously treated by the writer in a re- 
vision of the North American species of Hemitelia, section Cnemi- 
daria.? Its relationship is discussed below. 
Hemitelia rudis Maxon, sp. ov. PiaTE 16. 
Rhizome short, erect, mostly subterranean; fronds several, erect-spreading, 2 to 
2.5 meters long; stipes stout, about 80 cm. long, deeply sulcate, pale brownish, closely 
arachnoid-furfuraceous, distantly and sharply low-tuberculate, scantily paleacec.s, 
the scales deciduous, appressed, with glossy dark brown centers and broad whitish 
fimbriate margins; lamina 1.2 to 1.7 meters long, 60 to 80 cm. broad, oblong-lanceolate, 
deeply bipinnatifid, the rachis similar to the stipe but not tuberculate; pinne about 
17 pairs below the abruptly acuminate apex, subopposite or mainly alternate, inserted 
7 to 13 cm. apart on each side, the larger ones linear-lanceolate, 30 to 40 cm. long, 
5 to 8.5 em. broad, sessile, spreading, scarcely or not at all reduced at the inequi- 
lateral base, at the lower side rounded and often slightly imbricate upon the rachis, at 
the upper side parallel to the rachis, pinnatifid to within 2 or 3 mm. of the costa in 
the basal part, the costal wing broader outward, about 5 mm. broad on each side 
below the gradually long-acuminate, often attenuate apex; costze stout, together 
with the costules deciduously arachnoid-pubescent beneath and bearing occasional 
appressed broad flattish delicate pale scales; segments of middle pinnz 20 to 25 pairs, 
linear-oblong, acuminate to long-acuminate, slightly dilatate, 7 to 14 mm. broad, 
approximate to distinctly apart, falcate or subfalcate, coarsely crenate-serrate, the 
subimbricate proximal basal segment usually lobed upon the proximal margin; veins 
all free, evident, glabrous above, distinctly setulose beneath, once or twice forked, 
or the larger ones with 2 or 3 pairs of subopposite arcuate lateral branches; sori approxi- 
mate, mostly inframedial, borne upon the lower branches of the veins at or near their 
base, or rarely submedial by the production of an imperfect second row upon the 
second row of branches; indusium rather small, semicircular, subcucullate or repand, 
crenately lobed, fragile; receptacle ovoid, minutely pubescent. Leaf tissue rigidly 
herbaceous, dark green above, much lighter below. 
Type in the U. S. National Herbarium, nos. 670388-391, consisting of asingle frond 
taken from a plant growing in the humid forest of the upper Caldera watershed, 
1 Kunze, Farnkr. 1: pl. 82. 1846. ?Contr. U. 8. Nat. Herb. 16: 25-49. 1912. 
