MAXON—STUDIES OF TROPICAL AMERICAN FERNS. 45 
forest, Mansfield, altitude 300 to 500 meters, Maxon 2387, 2456. Without 
definite locality, Hart 174. 
Cusa: Mountains near Taco Taco, Baker 3835. Arroyo Trinitario, Rio Negro, 
Trinidad Mountains, Santa Clara, altitude 550 meters, Britton & Britton 5187. 
El Yunque Mountain, near Baracoa, altitude 300 to 600 meters, Underwood & 
Earle 626; Pollard & Palmer 118, 154. Pinal de Santa Ana, Yateras, Oriente, 
altitude 800 meters, Eggers 5030. Upper slopes and summit of Gran Piedra, 
Oriente, altitude 900 to 1,200 meters, Maxon 4034. Josephina, north of Jaguey, 
Yateras, Oriente, altitude 575 meters, Maron 4104. Santa Ana, about 6 miles 
north of Jaguey, Yateras, Oriente, altitude 600 to 625 meters, Maxon 4187. 
Monte Verde, Yateras, Oriente, altitude 575 meters, Maxon 4336. Without 
definite locality, Wright 888. 
Porto Rico: Maricao, Sintenis 417. Mount Jimenez, Sierra de Luquillo, Sin- 
tenis 1507. Cayey, in forests, Sintenis 2490b. Adjuntas, in forests of Mount 
Cienega, Sintenis 4168. Lares, in forest at Buenos Aires, Sintenis 6088. 
Road from Utuado to Lares, Underwood & Griggs 71. Hacienda Perla, north 
side of Sierra de Luquillo, altitude 150 meters, Heller & Heller 1043. Mount 
Morales, near Utuado, Britton & Cowell 831. Near Mayaguez, Britton & 
Marble 551; Cowell 581. Barranquitas, Hioram 277. 
Costa Rica: Banks of a stream near Santa Barbara, Pittier 1679. Alajuela, alti- 
tude 900 meters, Alfaro 108. 
20. Hemitelia kohautiana (Presl) Kunze, Bot. Zeit. 2: 298. 1844. PLATE 26. 
Cnemidaria kohautiana Presl, Tent. Pterid. 57. 1836, name and figure. 
Hemistegia kohautiana Presl, Abh. Bohm. Ges. Wiss. V. 5: 355. 1848, name only. 
Hemistegia grandifolia Presl, Abh. Béhm. Ges. Wiss. V. 5: 355. 1848, in part, as to 
Plumier reference, not Hemitelia grandifolia (Willd.) Spreng. 1827. 
Low-arborescent, the caudex up to 1.4 meters long and closely covered (at least below) 
with long dark adventitious roots; fronds numerous; lamina ample, probably 1.5 meters 
long or more, about 60 cm. broad, deeply bipinnatifid, acuminate, the rachis stout, 
brownish-stramineous, deeply trisulcate above, lightly and obtusely sulcate below, 
conspicuously but deciduously paleaceous, the scales linear-lanceolate to elongate- 
deltoid, all very long-attenuate, finely erose-fimbriate, whitish, or the larger ones with 
a narrow bright brown median stripe; rachis also yellowish scabrid pilose below, very 
rough; pinnee opposite or nearly so, 5.5 to 7 cm. apart, very narrowly oblong-lanceolate, 
30 to 33 em. long, 4 to 5 cm. broad, spreading, sessile, not narrowed at the base, here 
slightly apart from the rachis at the upper side, subcordate below and either contigu- 
ous to the rachis or partially overlying it, deeply and almost equally pinnatifid through- 
out, the costal wing 4 to 5 mm. broad upon each side, scarcely broader below the 
crenate and ultimately serrulate acuminate apex; costa stout, yellowish brown, sul- 
cate and glabrous above, below faintly canaliculate, 1 to 2 mm. broad, copiously 
clothed with spaced spreading scales similar to those of the rachis or relatively broader, 
falcate, subflexuous, whitish and without a median stripe; segments close, about 28 
pairs, nearly oblong, slightly broadest at the base, 9 to 11.5 mm. broad at the very 
narrow and sharply acute sinuses, subfalcate, subentire in the lower half, faintly 
serrulate above the middle, sharply so at the rounded apex; costules elevated, glab- 
rous above, copiously paleaceous below, the scales minute, whitish, bullate, ending 
in a capillary point; veins 13 to 16 pairs, elevated, mostly once-forked, the basal branch 
of each basal vein joined by a short transverse veinlet to the opposed basal branch of 
the basal vein of the adjacent segment, a narrowly elongate basal areole thus formed 
along the costule, all four branches excurrent to the sinus; second pair and succeeding 
veins mostly once-forked at or near the base (sometimes twice-forked), the branches 
rather close, oblique, soriferous beyond their middle; sori relatively small but contig- 
uous, extending in a close subflexuous supramedial line from the apex downward to 
