176 124 



3. Rhizome wide-creeping, nearly naked. Costæ beneath as a ruh' 

 with small scales. Lamina not narrowed downwards, papyra- 

 ceous to coriaceous. Pinnæ short-stalked. 



201. D. gongy lodes (Schkuhr) O. Ktze. 

 2. Sporangia setose. A tuberculiform aërophore at the base of the 

 pinnae beneath. Above the lowermost anastomosing pair of veins 

 are 3 — 4 pairs of veins connivent to sinus 202. D. Martini C. Chr. 



190. Dryopteris patens (Sw.) O. Ktze., Rev. Gen. PI. -i: 813. 1891; 

 C. Chr. Ark. for Bot. 9": 31 fig. 6. 



Syn. Pohipodium patens Sw. Prod. 133. 1788; Fl. Ind. occ. 1673. 



Aspidium patens Sw. Schrad. Journ. ISOO': 34. 1801 et auctt. pro parte. 



Pulypodium arcuatum Poir. Enc. ■'): 528. 1804 (Grenada. Mus. Paris!). 



Aspidium stipulare Willd. sp. •'): 239. 1810 (Plum. t. 23). 



Nephrodium stipulnre Jenman, Bull. Dept. Jam. n. s. 3: 93. 1896. 



Dryopteris stipularis Maxon, Bull. Torr. Cl. 33: 198. 1906. 



Aspidium macrourum Klf. Flora lS".i3' : 365; Mett. Aspid. nr. 219. 



Nephrodium macrourum Scott, Gen. ad t. 10. 1834; Bak. Syn. 262. 



Nephrodium conspersuni Schrad. Gott. gel. Anz. lSti4:869. 



Aspidium conspersum Kze. Flora 1839': Beibl. 32. 



? Nephrodium pohjtrichum Schrad. 1. c. 



Nephrodium dissimile Schrad. 1. c. 



Nephrodium albescens Desv. Prod. 258. 1827 (Mus. Paris!). 



Lastrea Kohautiana Pr. Tent. 76. 1836! 



Lastrea scabriuscula Pr. Tent. 75. 1836; Epim. 35! 



Nephrodium schizotis Hook. sp. 4: 107. 1862! 



Aspidium abruptum Mart, et Gal. Mem. Ac. Brux. 10: 65. 1842 (f. Fournier). 

 Type from Jamaica, leg. Swartz (S!). 



In my paper on Swartz's type-specimens of ferns (Ark. for Bot. 9": 28) I 

 have proved that the true Pol. patens Sw. is synonymous with A. stipulare Willd. 

 and A. macrourum Klf. The type-specimens are rather small, while A. macrourum 

 is a large-growing torm, and A. stipulare a form with the upper basal segments 

 very enlarged and deeply lobed, but there is no limit between these forms, which 

 agree exactly in all characters, the size excepted. 



The genuine D. patens as here understood can be distinguished from related 

 species by these three characters: 1) the erect rhizome, 2) the large, ovate, light- 

 brown, opaque, entire and commonly glabrous scales of the rhizome and stipe; 

 generally they are rather numeious, and 3) by the basal pair of segments, which 

 are much prolongated, acute and both parallel to rachis. Otherwise the species 

 varies very much and it is scarcely possible to give a description, which covers all 



