MAXON—STUDIES OF TROPICAL AMERICAN FERNS, 39 
14. Hemitelia mexicana Liebm. Vid. Selsk. Skr. V. 1: 287. 1849. Pate 24, b. 
Hemistegia mexicana Fourn, Mex. Pl, 1: 135. 1872. 
Caudex about 30 cm. high; fronds 1.8 to 2.25 meters long; stipe 30 to 45 cm, _ long, 
squamulose, at length glabrescent, toward the base very minutely aculeolate; lamina 
broadly lanceolate, 1.5 to 1.8 meters long, 45 cm. or more broad, simply pinnate, 
acuminate; pinne numerous, alternate, oblique, linear, about 30 cm. long, 2.5 to 3 
em. broad, straight or slightly falcate, sessile, not narrowed at the inequilateral base, 
obliquely truncate at the upper side, rounded below, deeply crenate about one-third 
the distance to the costa at the base, about one-fourth the distance to the costa (or 
less) at the middle, only the outer fourth obliquely and broadly crenate-serrate, the 
apex appressed-serrulate; major crenations 3 to 5 mm. long, 5 to 7 mm. broad at the 
base, rounded-subtruncate, short-apiculate distally, the margins minutely revolute, 
entire; cost elevated, greenish brown, glabrescent, a very few minute flattish yel- 
lowish scales subpersistent at the sides; main veins 50 pairs, nearly at right angles, 
4 to 7 mm. apart, elevated, very slender, with 5 to 8 pairs of simple oblique arcuate 
veinlets, the basal of these usually joined by a transverse veinlet, then (one or both) 
excurrent to the sharply acute sinus, the other veinlets also extending to the margin, 
but mostly beyond the sinus; veins and veinlets minutely squamulose-setiferous; 
areoles relatively broad, ample, subhexagonal, broadest distally; sori 2 or 3 pairs to 
each group of veinlets, occupying a slightly inframedial zone between the costa and 
margin of the pinne; indusium light brown, semicircular or commonly suborbicular, 
crenately 3 to 6 lobed, the lobes repand-pateriform, reflexed; receptacle capitate, 
squamulose; leaf tissue membrano-herbaceous, dark shining green above, lighter 
below. 
Type LocaLity: Mountain forests near Cacolé (printed Cacoba, in error), District 
of Chinantla, Oaxaca, Mexico, altitude 750 to 900 meters, Iiebmann. 
DistRIBUTION: Known definitely only from the original collection. 
The above description is drawn partly from two middle pinne (with a portion of 
the rachis) of the type specimens, which have been received from the Botanisk 
Museum, Copenhagen, through the kindness of Mr. Carl Christensen; and partly 
from Liebmann’s original diagnosis. The species is well marked and will probably 
be found not uncommon in the mountainous districts of Oaxaca at mid-elevations. 
EXPLANATION OF PLATE 24.—Portions of characteristic pinne (a) of type specimen of Hemitelia guate- 
malensis; (b) of type specimen of H. mezicana; (c) from type collection of H. (wcida; (d) of type specimen 
of H. choricarpa. All natural size. 
15. Hemitelia lucida (I*ée) Maxon. PLATE 24, ¢. 
Hemistegia lucida Fée, Gen, Fil. 351, 1850-52. 
Caudex undescribed; stipe very stout, somewhat spiny, paleaceo-furfuraceous; 
lamina (estimated) about 2 meters long, apparently ovate-oblong, about 80 cm. 
broad near the middle, 40 em. broad at the base; pinnsze numerous, divergent, the 
larger ones about 8 cm, apart on each side, ligulate-lanceolate, straight or upwardly 
faleate, up to 45 cm. long, 3.5 to 4.2 em, broad, serrate to serrulate at the gradually 
tapering, long-acuminate apex, elsewhere crenate to crenately lobed; principal cre- 
nations or lobes 28 to 34 pairs, rounded, 9 to 12 mm. broad at the sinuses, less than 
one-half as long, rounded, directed forw ard and subrectangular at the distal border, 
the sinuses obliquely triangular, open and acute, the margins subentire, minutely 
revolute; coste elevated, glabrous above, nearly glabrous below, there bearing a few 
minute deciduous dirty white scales; midveins (or costules) divergent from the 
costa, subopposite to alternate, 9 to 10 mm, apart on each side, elevated, glabrous 
upon both surfaces, discontinuous (7. e., forked) at the apex of the lobes, below this 
nearly straight; veinlets 5 to 9 pairs, oblique, simple, the lowermost ones of adjacent 
crenations joined by a transverse veinlet (this distant 2 to 2.5 mm. from the costa), 
then immediately soriferous and produced, commonly joining the second oblique 
vein of the same group at a point about one-half the distance to the sinus (or beyond) 
