i8g BOTANICAL GAZETTE. 



at an altitude of 5500 feet, in company with Liatris spica'a, Melanthium 

 Virginicmn, and Delphinium exaltatum. — J. W. Chickering, IVashing- 

 ton, D. C. 



Ferns of Arkansas. — An exhaustive list of the fems of Arkan- 

 sas having never been pul)lished, but little is known by fern specialists 

 of the representatives of this order in this State. Having been urged 

 by several correspondents to prepare a list, we take great pleasure in 

 presenting our observ.xtions, up to date, to the Gazette for publication, 

 that they may reach a greater number of botanists. 



The varied physical features of Arkansas give a wide range of 

 habitat. 



Upon the dry calcareous cliffs of the mountainous region, with a 

 south exposure, are found the conditions fav >rable for the growth of 

 such genera as Chcilanf/ifs, Nothokvna and Pellcea. 



The mountain gorges of N. W. Arkansas, shaded from the direct 

 rays of the sun are favorite places for shade and moisture loving gen- 

 era, such as Polypodium, Aspleuinm, Adiantum, Camptosorus, Cystopteris, 

 Woods ia and some species of Aspidium 



In open woods, in dry calcareous soil, Phcgopteris and Pteris are 

 found. 



The low rich woods and swamps invite Osmunda, Bolrychiiim, 

 Ophioglflssum, Woodwardia, Oiwclea, and some species of Aspidium and 

 Asplenium. 



We are able to report forty forms (including varieties) as the 

 present number of ferns known in Arkansas. An exhaustive list is 

 not claimed, as each year's research has been rewarded by one or two 

 species, and probably more will be found. 



The order is well represented in this State by seven of the ten 

 tribes of Polypodiacece and a range of twelve genera, besides Osmun- 

 dacex and the two American genera of Ophioglossacece. 



The following list is arranged in accordance with the excellent 

 "Fern List" by Prof. D. C. Eaton recently published. 



ORDER FILICES. 



SUBORDER POLYPODIACE.E. 



Tribe AcrostichE/«. 



(Not Represented. ) 



Tribe Polypodies. 



1. Poly podium vulgare, L. — N. W. Arkansas, upon rocks in shaded 

 damp situations Grows large and thrifty. Seems to prefer sand- 

 stone, though it grows on moss covered trees near shaded cliffs. Nev- 

 er found on limestone in this region. 



2. Polypodium incanum. Swartz. — Found sparingly, in depauperate 

 form, in N. VV. Ark., upon the escarpments of sandstone cliffs near 

 permanent moisture. S. Ark. upon moss covered trees abundantly.^ 

 The specimens are large and well developed. Grows luxuriantly upon 

 the shaded sides of low trees with horizontal branches. 



Tribe Grammitides. 



3. Notholana dealbata, Kunze. — N. W. Ark., abundantly, upon the 



