Prats 4, 
GYMNOGRAMME vrrrrorrata, Desv. 
Ternate-leaved Gymnogramme. 
GYMNOGRAMME frifoliata; tall, erect, rigid; caudex shortly creeping; stipes 
stout (and the rachis), bright castaneous, glossy, at the base squarrose, with 
sparse broad-subulate scales; fronds oblong-lanceolate, elongate, pinnate; 
pinnee numerous, lower ones petiolate, ternate, upper ones sessile, simple, 
and, as well as the pinnules, linear-lanceolate, serrulate, naked, or clothed 
with a yellow or whitish powder beneath; veins oblique, approximate, 
clothed with the narrow lines of sori, which are at length confluent. 
GYMNoGRAMME trifoliata. Desv. Journ. Bot. v. 1. p. 25, and in Mén. Soc. Linn. 
v. 6. p. 214. 
Acrosticuum trifoliatum. Linn. Sp. Pl. p. 1527. Willd. Sp. Pl. v. 5. p-119. 
Sw. Syn. Fil. p. 13. Schk. Fil. p. 3. t. 3. et 22. 
Hemionitis trifoliata. H. B. K. Nov. Gen. Am. v. 1. p. 4 
TRISMERIA argentea, T. aurea, and T. microphylla? (sterile). Fée, Gen. Fil. p. 
165. 
PHYLLITIS ramosa trifida. Sloan, Jam. v. 1. t. 45. f. 2. 
Lineva cervina triphylla, etc. Plum. p. 123. f. 144. 
Has. Abundant in Jamaica, and probably in the West Indian Islands generally ; 
Cuba, C. Wright. Brazil, Sellow. New Grenada, Schlim, Fendler, Moritz. 
Guatemala, Skinner. Peru, Cuming ; Lima, Seemann ; Areca, Lechler ; Tara- 
pota, Spruce. 
A very noble, erect, and peculiar-looking tropical American 
Fern, of which many of our native specimens are from three to 
four feet high, with the stout stipes and the very straight rachis 
of a rich glossy chestnut colour, the former clothed with brown 
squarrose scales at the base; most of the pinne are ternate, 
that is to say, each short petiole bears three pinnules ; towards 
the summit of the frond a few of the pinne bear two pinnules, 
but the uppermost ones are all undivided, and, as M. Fée justly 
observes, resemble the leaves of Salix viminalis. The fructifi- 
cation is mostly confined to the pinne on the upper half of the 
frond, where it appears covering the copious forked veins, and so 
abundant and close-placed as eventually to become confluent, 
clothing all the back of the frond, then resembling an Acrostv- 
chum, as it has often been called. These fructifications are accom- 
panied by a pulverulent substance, sometimes yellow, but often 
white, which is considered to be a waxy secretion from the frond, 
JANUARY lst, 1861. 
