POLYPODIACEAE. 471 



1. Phymatodes exiguum (Hew.) Underw. Torreya 3: 18. 1903. 



Polypodium exiguum Hew. Mag. Nat. Hist. II. 2: 458. 1838. 

 Polypodium Sivartzii Baker, in Hook. & Baker, Syn. Fil. ed 2, 357. 1874. 



Eootstocks creeping on trees or shrubs, slender, clothed with brown linear- 

 lanceolate scales, simple or branched, sometimes 8 dm. long. Leaves thin, 

 various, linear, oblong, lanceolate or oblanceolate, 5-10 cm. long, 5-15 mm. 

 wide, acute or obtuse at the apex, narrowed at the base into petioles 4—12 mm. 

 long, entire or slightly undulate; sori mostly in 2 rows, one row on each side 

 of the midvein. 



On tree-trunks in coppices, Andres, New Providence : — Florida ; Jamaica ; Cuba 

 to St. Jan ; St. Croix ; Montserrat. Climbing Polypody. 



14. CAMPYLONEURUM Presl, Tent. Pter. isO. 1836. 



Tufted ferns, with large narrow entire leaves. Sori dorsal, mostly in 1 or 

 2 rows on each side of the primary veins; indusium none. Primary venation 

 regularly pinnate, the veins connected by nearly parallel veinlets forming regu- 

 lar areoles. [Greek, crooked-nerved.] Twenty species or more, natives of 

 tropical and subtropical regions, the following typical. 



1. Campyloneunim Phyllitidis (L.) Presl, Tent. Pter. 190. 1836. 



Polypodium Phyllitidis L. Sp. PL 1083. 1753. 



♦ Eootstock short, stout. Leaves several or many, short-petioled, broadly 

 linear, narrowed to both ends or rarely obtuse at the apex^ 3-10 dm. long, 2-10 

 em. wide, rather firm in texture, smooth and shining; sori small, often very 

 numerous. 



On trees and in sink-holes in coppices, Abaco, Great Bahama, Andres, New 

 Providence, Crooked Island : — Florida ; West Indies ; continental tropical America. 



Strap-fern. 



15. TECTARIA Cav. Anales Hist. Nat. 1: 115. 1799. 



Usually terrestrial ferns, with creeping or horizontal rootstocks, and thin 

 broad lobed, coarsely toothed or pinnate leaves. Sori orbicular, dorsal, borne 

 on the backs of veins. Indusia orbicular to reniform. A^eins copiously anasto- 

 mosing, forming many areolae. [Latin, referring to the indusia.] Over 40 

 species, natives of tropical and subtropical regions. Type species: Polypodium 

 trifoliatum L. 



Fully developed leaves not much longer than broad. 



Basal lobes and usually all lobes of the fully developed leaf 



long-acuminate ; leaves rather firm in texture. 1. T. Jieracleifolia. 



At least the basal lobes obtuse, merely acute or rarely acumi- 

 nate ; leaves thin in texture. 2. T. minima. 

 Fully developed leaf 2-3 times as long as broad, the lobes all 



rounded. 3. T. Amcsiana. 



1. Tectaria heracleifolia (Willd.) Underw. Bull. Torr. Club 33: 200. 1906. 



Aspidium lieracleifolium Willd. Sp. PI. 5: 217. 1810. 



Rootstock stout, brown-scaly. Leaves 2-10 dm. high; petioles brown, 

 shining, as long as the blades or shorter; blades various in form, rather firm in 

 texture, the finely developed ones broadly triangular, little longer than wide, at 

 least the lower lobes or segments long-acuminate ; less developed leaves ovate, 

 the apex long-acuminate; sori usually many, in 2 more or less complete rows 

 parallel with the lateral veins, 2-2.5 mm. in diameter. 



Coppices, New Providence : — Florida ; Texas ; West Indies ; continental tropical 

 America. Halberd-fern. 



