Prats 48. 
POLYPODIUM (§ Evrotyroprum) piesesum, Schlecht. 
Plebeian Polypody. 
Potypoprum (§ Eupolypodium) plebejum, Schlecht.; caudex moderately stout, 
elongated, creeping, densely covered with small, lanceolate, fringed and 
crisped brown scales, frequently with a black costa in the centre; stipites 
purplish-brown, distant, three to four and six inches long, margined with 
an obscure wing on each side, more distinct upwards, firm, coriaceo-mem- 
branaceous, six inches to a span and more long, in outline oblong, scarcely 
acuminated, with a truncated base, deeply, almost to the very rachis pin- 
natifid (or pinnated with a decurrent wing); the segments horizontally pa- 
tent, linear-oblong, often narrower above the base, so as to be subspathu- 
late, more or less acute or obtuse, subcrenato-serrate, naked above, here 
and there having a few cretaceous dots near the margin, beneath and on 
the rachis and costz more or less clothed with scattered, small, ovate, acu- 
minated, appressed, and subpeltate scales; veins immersed, indistinct, once 
or twice forked, free, the lowest superior veinlet bearing the globose or sub- 
oval sorus; the sori forming two rows, halfway between the costa and the 
margin. 
Potypopium plebejum. Schlecht. in Linnea, v. 5. p. 607. Kze. in Linnea, 
v.18. p. 319. Liebm. Fil. Mex. p. 46. 
Porypop1uM leucostictum. Kl. in Linnea, v. 20. p. 380. 
Portypopium Karwinskianum. Metten. Polyp. p.66. Hat. Fil. Wright et Fendi. 
p. 198. 
MarernaRia Karwinskiana. Pr. Tent. Pterid. p. 188 (name only). 
Has. Mexico, on mountains, three to eleven thousand feet, Harris; Galeotti, 
n. 6277; Liebmann. Vera Paz, Guatemala, Salvyn. New Granada, Moritz, 
n. 336; Hartweg, n. 1499; Hendler, n, 252. Andes of Quito, Jameson, 
n. 14 and 54; Spruce, n. 5239 (large). Trees on the Organ Mountains, 
Gardner, n. 5920,—Cultivated at Kew. 
Dr. Mettenius adopts the name of Karwinskianum for this 
species, because of its priority over P. plebejum; but it was a 
name without any note or remark by which the plant could be 
recognized. Schlechtendal gave it a name from its general re- 
semblance to our common Polypods, “‘e viliore grege P. vul- 
garis,’ with which it has no small affinity ; but the curious sub- 
peltate scales, close-pressed to the under side of the frond, to- 
together with the general form, bring it nearer to the well-known 
P. incanum and its allies, a group m which the venation some- 
times represents that of Marginaria, sometimes that of P. vul- 
DECEMBER lst, 186]. 
