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ARTICLE LIV. 
Of the difference between the Genuine Calaguata and the other 
Roots with which it is confounded, and of the Reasons 
that exist for adopting the vulgar Names of Calaguala and 
~ Huacsaro. 
The Polypodium Calaguala is a very different species from 
any of the Polypodia mentioned by Linneus in his Species Plan- 
tarum. It approaches nearest tothe Polypodium lanceolatum of 
that author, or to the Phyllitis, folio longo, angustifolia, mas- 
culis majoribus of Petiver Filic. 8. tab. 6. fig. 2. differs from the 
latter in this respect, that the spots. of fructification do not pass 
beyond the middle of the frond, and are disposed in two lines 
in a quincunx order; that is, some of the spots are alternately 
contiguous to the principal nerve of the frond; the rest of the 
spots are a little distant from it; so that they form two lines, ‘one 
resting on the nerve, the other somewhat remote. The spots of 
fructification in P. danceolatum, on the contrary, are placed in 
two parallel lines along the whole of the frond; that is, on 
each side of the nerve there is only one line of sori, as is illus- 
trated in the figure of Petiver. Calaguala likewise differs in the 
margins of the fronds being revolute, and the stipes being co- 
vered with small squame, which marks are wanting in P. lanceo- 
latum. Though 1 in some narrow frond of the Calaguala only one 
line of sori is observable on each side of the midrib, and also 
in the broadest fronds, which proceed from the same root with | 
the narrow and middle-sized, some of the sori are seen to de- 
viate towards the margin of the frond out of the regular line, 
they never occupy. the whole length of the frond, as in P. lan- 
