: 
Hartwegiane. . N. O. Filices. 
TAB, CCCKACtLY. 
ANTROPHYUM ENSIFORME, 
Fronde e lata basi ensiformi-lanceolata subfalcata tenui sub- 
membranacea leniter falcata obtusiuscula obscure costata 
enervi, soris uniserialibus inter costam et marginem elongatis 
interruptis flexuosis extus (marginem versus) ramosis. 
Antrophyum ensiforme. Hook. in Benth. Plant. Hartw, p. 73. 
n, 522, 
Has. On the summit of the mountain Totontapaque, altit. 
10,000 ped.; Hartweg. 
A very singular and well-marked species of Antrophyum, as 1 
am disposed to consider it, quite distinct from any hitherto de- 
scribed. The root is tufted, consisting of numerous downy 
fibres. Fronds 3—4 from one point, erect, a span or more 
high, quite sessile, rather broad at the base, lanceolate, thin and 
almost membranous, especially at the margin, where it is some- 
What transparent, slightly falcate, obtuse at the apex. A rather 
obscure costa runs through the centre, gradually becoming fainter 
upwards; but there are no visible reticulations or veins, even 
when the plant is held up between the eye and the light. Sori 
consisting of elongated, interrupted, flexuose lines, between the 
Costa and margin, and nearly parallel with them : these lines 
send out oblique branches on the side next the margin only, and 
they are sunk into the substance of the frond. 
Fig. 1. Portion of the fertile frond with sori. f. 2. Capsule : 
—magnified. 
