76 POLYPODIUM, § PHYMATODES. 



confluent into transverse oblong or linear sori, quite grammitoid. Occasionally 

 the sori form a solitary series on each side the costa (in the simple-fronded forms), 

 and then they are rather large. 



*** Fronds pinnatifid. Sp. 360-383. 



360. P. (Phymatodes) angustuni, Metten. ; caudex creep- 

 ing nearly as thick as a duck's quill paleaceous with brown 

 narrow crisped scales, stipites remote or aggregated 2-5 

 inches long and as well as the costa often ebony-black and 

 the whole under side more especially of the plant sparsely 

 clothed with small ovate peltate appressed ciliated scales, 

 fronds coriaceous flabelliform in outline deeply but irregularly 

 digitato-pinnatifid almost to the rachis with linear acumi- 

 nated entire segments 3-5 inches long, the base broad and 

 decurrent, the margin thickened most so on the under side, 

 costae very distinct but the venation is internal and very ob- 

 scure, sori oval rather large partially sunk in the thick frond 

 approximate forming a single series parallel with the costa 

 and occupying the upper half of the segments mixed with 

 peltate stipitate scales. — Metten. Polyp, p. 90. Pleopeltis, H. 

 B. K. Nov. Gen. Am. i. p. 9. t. 1. Willd. Sp. PL y. p.2l\. 

 Phlebodium, J. Sni. Polypod. peltidifolium, Raddi, Fil. Bras, 

 p. 16./. 21. Hook. Ex. Ft. t.Q\. Pleopeltis Raddiana, Gau- 

 dich. Drynaria torulosa, Fee, 6me Mem. Foug. Nouv. p. 17- 

 /. 5./. 4. D. stenoloma, Fee, I. c. p. 8. t. 4./. 1. Pol. secti- 

 frons, Metten. Polyp, p. 99. 



Hab. Mexico, Humboldt, Galeofti. Guatemala, Skinner, n. 038, 6368, and 

 6532 (Drynaria torulosa, Fee). Brazil, abundant. — This is the Fern upon which 

 Humboldt's genus of Pleopeltis was founded. It is a well-marked species in the 

 digitate or subdigitate or even subpalmate form of the frond, the lower segments 

 being generally equal in length with the rest and erecto-patent. The locality 

 seems rather limited. It appears to avoid the hotter and moister parts of the 

 tropics. 



361. P. (Phymatodes) leucosporum, Kl. ; caudex long 

 creeping clothed with narrow appressed scales, stipites stout 

 distant 4 inches to a span and more long deciduously palea- 

 ceous, fronds very coriaceous 3 inches to a span long lan- 

 ceolate an inch to 2-3 inches broad in the broadest part fur- 

 furaceo-squamose on both sides deeply pinnatifid in the 

 lower half, the upper half much narrower sinuato-pinnatifid 

 entire or obtuse, segments horizontal inferior ones often 1^ 

 inch long but very unequal oblong obtuse entire or slightly 

 sinuatCj upper and much shorter ones subtriangular-semi- 



