472 POLYPODIACEAE. 



2. Tectaria minima Underw. Bull. Torr. Club 33: 199. 1906. 



Eootstock slender, short, brown-scaly. Leaves 0.8-4 dm. long; petioles 

 green, or brownish, slender, commonly much longer than the blades, often very 

 slender; blades various, thin, ovate or ovate-lanceolate, but the fully developed 

 ones not much longer than broad, lobed, pinnatifid or sometimes trifoliolate, 

 the basal lobes obtuse, acute or rarely acuminate; sori usually few, scattered, 

 or in 1 or 2 more or less complete rows parallel with the lateral veins, 1-1.5 

 mm. in diameter. 



In sink-holes, wells and caves, Abaco, Andres, New Providence, Eleuthera, Cat 

 Island : Florida ; Cuba. SMALL HALBERD-FERN. 



Recorded by Mrs. Northrop as Tectaria trifoliata (L.) Cav. and by Dolley as 

 Aspidium trifoliatum Sw. 



3. Tectaria Amesiana A. A. Eaton, Bull. Torr. Club 33: 479. 1906. 



Eootstock short, stout. Leaves 4 dm. long or less; petioles rather slender, 

 about as long as the blades or shorter; blades narrowly ovate or ovate-lanceo- 

 late in outline, rather thin, pinnate-pinnatifid, the segments and lobes obtuse or 

 rounded, the lower 1 to 3 pairs of pinnae short-stalked; sori scattered or in 

 1 or 2 more or less rows parallel with the venation, 1-1.5 mm. in diameter. 



Eleuthera, at Gregory Town (Goker 872) ; referred to this species with hesita- 

 tion. Known otherwise only from one station in Florida. AMES' HALBERD-FERN. 



16. DRYOPTERIS Adans. Fam. PI. 2: 20, 550. 1763. 



Ferns with simple to 23 pinnate or pinnatifid leaves and round sori usually 

 borne on the backs of the veins, the fertile and sterile leaves usually similar. 

 Indusium flattish, roundish-renif orm, superior, fixed by its sinus, or the indusium 

 minute and vestigial or altogether wanting. Stipe continuous, not jointed with 

 the rootstock. Veins free or anastomosing. [Greek, signifying oak-fern, in 

 allusion to the forest habitat of most species.] Species several hundred, of 

 wide distribution. Type species: Polypodium Filix-mas L. 



Leaves mostly erect; veins free. 



Pinnae elongated, linear-lanceolate. 1. D. augescens. 



Pinnae lanceolate. 2. D. normalis. 



Leaves reclining, often rooting at the tip. 



Stipe and rachis laxly puberulent, many of the hairs simple ; 



veins with several branches, the basal ones joined. 3. D. reptans. 



Stipe and rachis closely stellate-puberulous, nearly or quite de- 

 void of long simple hairs ; veins mostly forked, usually free. 4. D. cordata. 



1. Dryopteris augescens (Link) C. Chr. Danske Vidensk, Selsk. Skr. VII. 10 2 : 



182. 1913. 

 Aspidium augescens Link, Fil. Sp. 103. 1841. 



Eootstock horizontal, rather stout, scaly. Leaves once pinnate, mostly 

 erect, sometimes 1 m. long or longer, lanceolate in outline, the petiole usually 

 shorter than the blade, puberulent and scaly at the base, otherwise smooth ; 

 pinnae many, close together, linear -lanceolate, sessile, often 1.5 dm. long, 1-2 

 cm. wide, deeply pinnatifid, slender-tipped, more or less pubescent at least 

 beneath, the segments ovate-lanceolate, acute, entire, the lower ones somewhat 

 larger than the others; veins free. 



Pine-lands, coppices, caves and sink-holes, Great Bahama, Andros, New Provi- 

 dence, Eleuthera: Florida: Cuba; Central America. Reported by Mrs. Northrop as 

 Dryopteris patens (Sw.) Kuntze. 



2. Dryopteris normalis C. Chr. Arkiv. Bot. 9: 31. 1910. 



Eootstock horizontal, slender, scaly. Leaves erect or ascending, once pin- 

 nate, 3-15 dm. long, lanceolate to ovate-lanceolate in outline, the petiole usually 



