POLYPODIACEAE. 471 



1. Phymatodes exignum (Hew.) Underw. Torreya 3: IS. 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, 510 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, Andros, New Providence : Florida ; Jamaica ; Cuba 

 to St. Jan ; St. Croix ; Montserrat. CLIMBING POLYPODY. 



14. CAMPYLONEURUM Presl, Tent. Pter. 189. 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. Campyloneumm Phyllitidis (L.) Presl, Tent. Pter. 190. 1S36. 

 Polypodium Phyllitidis L. Sp. PI. 1083. 1753. 



Kootstock 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 

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

 numerous. 



On trees and in sink-holes in coppices, Abaco, Great Bahama, Andros, 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. Veins 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. hcraclcifolia. 



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. Amesiana. 



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

 Aspidium heraclei folium Willd. Sp. PI. 5: 217. 1810. 



Eootstock 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. 



