Maxon : Notes oN NortH AMERICAN PHANEROPHLEBIA 27 
of Central America. From this material the following description 
is drawn: 
Rhizome very stout, decumbent, chaffy at the summit, bearing 
a semierect crown of 4 to 6 fronds, these 85 to 135 cm. long; stipes 
stout, 35 to 45 cm. long, 5 to 9 mm. thick at the base, at first very 
densely clothed on all sides with spreading light. brown to dirty 
yellowish brown oblong to oblong-ovate scales, these 1 to 2 cm. 
long, of thin texture, or those toward the base thicker, glossy, 
and with darker brown centers, all delicately erose or lightly 
fimbriate-lacerate; lamina oblong to very broadly oblong in out- 
line, 40 to 90 cm. long, 25 to 45 cm. broad, comprising 6 to 17 
pairs of equal pinnae below the conform terminal segment of the 
same size; rachis very stout, strongly angled, copiously but de- 
ciduously chaffy, the scales narrow to nearly capillary, forming a 
loosely crispate covering; pinnae spreading or somewhat ascend- 
ing, 4.5 to 7 cm. apart on each side, straight or nearly so (rarely 
falcate), 18 to 25 cm. long, 3 to 4 cm. broad,* sharply long-acumi- 
nate, narrowly oblong to oblong-lanceolate from a strongly in- 
equilateral base, the upper side broadly cuneate and parallel to 
the rachis, the lower widely and abruptly excavate, all petiolate 
(the basal ones 5 to10. mm.); leaf tissue coriaceous, the under surface 
bearing numerous minute setiform reddish scales, especially along 
the veins; veins 4 to 6 mm. apart at the base, evident, or below 
conspicuously elevated, 3- to 5-forked, the lowest proximal branch 
usually extending nearly to the margin; margins strongly cartilag- 
inous, the marginal teeth stout and short, almost invariably only 
one to each group of veinlets; sori (except with age) very large, 
2 to 3 mm. in diameter, hemispheric, distinctly inframedial as to 
the veinlets, 1 to 4 to each group, forming 1 to 4 lines (the outer 
ones often incomplete) upon each side of the midvein, the first 
row usually about 1 to 2 mm. distant, the others close or apart, 
never extending to the vicinity of the margin; indusia ample, but 
delicate and usually early withering. 
Specimens examined in the National Herbarium: 
Costa Rica: Without definite locality, J. J. Cooper (type col- 
lection). Foréts du Tittoral, southeastern slope of Volcano 
Irazu, altitude 2,400 meters, Pittier 848. Foréts du Copey, alti- 
tude 1,800 meters, Tonduz 11930. 
GUATEMALA: San Miguel Uspantan, Depart. Quiché, altitude 
7,000 ft., J. D. Smith (Heyde & Lux) 3241 (type collection of P. 
* In one exceedingly fertile frond only 2 cm. broad. 
