BROADHURST: STRUTHIOPTERIS IN NortH AMERICA 263 
Lomaria ensiformis Liebm. Vid. Selsk. Skr. V. 1: 82. 1849. 
Blechnum ensiforme C. Chr. Ind. Fil. 153. 1905. 
Plants epiphytic. Rhizome creeping, 5-7 cm. long in frag- 
ments seen, the scales linear, 5-10 mm. long, maroon to tobacco 
brown, with a black median line. Sterile fronds go-100 cm. long; 
stipes scattered, 20-28 cm. long, channeled on the upper side,* 
not angulate, marked about halfway down by scarlike undeveloped 
pinnae, bicolored, the darker side dark chocolate brown, the 
deciduous basal stipe scalesf smaller than the scales of the rhizome; 
lamina 40-68 cm. long, 25-35 cm. wide, broadly oblong, abruptly 
reduced at the base (type A, but with vestigial pinnae as described 
above), the apex gradually reduced, the terminal pinna 5-8 cm, 
long, the pinnae more or less opposite, the lower ones distant, 
sometimes 2-3 cm. apart; pinnae 22-28-jugate, narrowly oblong 
to linear, straight, not falcate (if curved, only near the apex), 
horizontal or ascending, 16-18 cm. long, 12-17 mm. wide,{ long- 
acuminate, the base dilated in the upper pinnae, in the lower ones 
occasionally slightly contracted; margins entire (or barely sub- 
entire near the apex, not definitely serrate), not at all or very 
slightly revolute; leaf tissue rigid-herbaceous, without scales; 
veins not conspicuous, usually sunken on the under side, the vein 
apices with very slight swellings or depressions, the vein spaces 
10-13 to I cm. Sporophyls 60-70 cm. long; stipes§ 20-28 cm. 
long, Straw-colored or bicolored; lamina 32-45 cm. long, gradually 
uced toward the apex, the terminal pinna 5-10 cm. long; pin- 
nae 20-30-jugate, 10-20 cm. long, 3-4 mm. wide, with a sterile 
Up 3-6 mm. long, the base contracted (occasionally dilated below 
the contraction); indusium rather heavy, entire, not becoming 
lacerate; sporangia dark brown. 
TYPE LOCALITY: Oaxaca, Mexico. 
Distrigution: Mexico, Guatemala, Costa Rica, and Panama. 
SPECIMENS INCLUDED: GUATEMALA: Baja Verapaz, ‘“Hoch- 
Wald bei Purutha,” altitude 1,800 m., von Tiirckheim 1693 (Y, N).|| 
ios till the species included in this paper the rachis and stipe are channeled 
d ering Per (ventral) side; that statement is not, therefore, repeated in the following 
scriptions, 
T Unless otherwise described in the following species, the basal stipe scales are 
; — more deciduous than the rhizome scales but similar in color and texture. 
ou 
lateral ones. : : z 
; . the width is measured at the adnate base of the non-petioled pinnae. 
*€stigial pinnae, Seales, etc., as in the sterile stipes. This likeness will be 
ee the specimen cited is in the United States National Her- 
’ «in the herbarium of the New York Botanical Garden. 
