POLYPODIUM, § GONIOPIILEIUUM. 27 



10 inches long, 2 inclios wide; " V^rondes magnitudine et substantia valde variant, 

 nunc rigidic coriaceaj nunc fere membianaceae") ; Peru, Matliews, n. 1839, 1832, 

 1834, Poeppig {P. arliculatum, Dcsv., Kze.), Spruce, n. 39G4, 40C4 ; Brazil, 

 Raddi, Gardner, n. 131. — Although an extremely variable plant in size and tex- 

 ture, this is a species easily recognized, and is remarkable for the numerous sori, 

 often covering the whole liack of the pinnae except at the margin, and these ar- 

 ranged with great regularity in one direction parallel with the costa (longitudi- 

 nal), in the other, with the primary veins or costules (obliquely transverse). P. 

 adnatum is a very near ally. 



271. P. (Gonioj)hlcl)ium) adnatum. Hook.; caudex ?, stipes 

 9-10 inches and more long glossy-brown as well as the 

 rachis, fronds 1^-2^ feet and more long 10 inches and 

 more wide ovate acuminated pinnated membranaceous dark 

 blackish-green very opaque on the surface minutely downy, 

 pinnfe 13-17 patent 6-8 inches long 1-H inch wide remote 

 subelliptico-laiiceolate suddenly subcuspidato-acuminate ob- 

 scurely serrated moderately attenuated towards the base and 

 there sensibly decurrent, uppermost pairs opposite and more 

 decurrent, terminal pinna resembling the rest but long- 

 ])etiolate and very decurrent at its base, primary veins sub- 

 costuliform approximate straight in direction but flexuose 

 and scarcely thicker than the veinlets, the opposite veinlets 

 uniting and forming areoles each having a free included 

 veinlet terminated by a solitary sorus, sori rather small form- 

 ing a single series between each pair of primary veins. — 

 Kze.inKl. Linnoia, xx. p. 395. Met ten. Polyp, ji. 7^. 



Hab. ^v\\'\%\\ G\.\\an&, Schomburgk, n. h^i, Appun. New Granada,. &///»n, »(. 

 320, Moritz, n. 359. Ecuador, Jameson. Guatemala, Skinner. — Some of my 

 sjjecimens of this so closely resemble the ordinary forms of P. ( Campyloneurum) 

 decurrens, Raddi, that, without carefully examining the venation, I had placed it 

 in the same cover with that species ; but it is evidently the P. adnatum of Kunze 

 and Klotzsch, and may possibly be only a variety of the jireceding, with the 

 upper pinnae more or less adnate and decurrent. 



272. P. (Goniophlebium) menisciifolhw/, Langsd, and 

 Fisch. ; caudex creeping, stipites 1-2 feet or more long, fronds 

 ample firm-membranaceous glabrous dark olive-green H-2 

 feet long oblongo-ovate pinnated throughout, pinnic patent 

 sessile from an obliquely and very obtusely cuneated base 

 (of which the superior niargin is more or less rounded) 6-7 

 inches to a foot long |-1| inches wide oblong or oblongo- 

 lanceolate acuminate entire or sulisinuate, upper ones more 

 or less broadly so and opposite, terminal one large, primary 

 veins straight costuliform, opposite veinlets forming six to 

 eight areoles each with a free veinlet of which three to five 

 "from the costa arc sorifcrous thus forminn as manv soral 



