PLANTS OF ARKANSAS. 239 



RHIZOCARPEJE. 



Marsilia, L. 



uncinata, A. Br. Underwood, in Our Native Ferns 

 and their Allies, p. 115 — Coville. 



(The autonomy of the plant reported by Lesquereux, 



under the name of M, mucronata, Willd., as 



found by Nuttall, is uncertain — Coville.) 

 Pilularia, 



americana, A. Br. Underwood, 1. c, p. 116 — Coville. 



A soil a, Lam. 



caroliniana, Willd. 



OPHIOGLOSSACEJE. 



Op/iioglossum, L. 



vulgatum y L.; Nuttall, Harvey. 

 Botrychium, Sw. 



tematum (Thunb.), Sw.; Nuttall, Harvey. 



var. obliquum (Muhl.), Milde ; Nuttall, Harvey. 



virginianum (L.), Sw. 



FILICES. 



Poly podium, L. 



incanum, Sw. 



vulgare, L. 

 Notholcena, R. Br. 



dealbata, Kunze ; Harvey. 

 Adiantum, L. 



capillus -veneris, L.; Lesquereux, Harvey. 



pe datum, L. 

 Pteris, L. 



aquilina, L. 



var, candata (L.), Hook.; Coville, Harvey. 

 Cheilanthes, Sw. 



alabamensis, Kunze. 



eatoni, Baker. In clefts in the rocks at Mountain 

 Park, Big Rock, near Little Rock — Coville. 



lanuginosa, Nutt.; Butler, Harvey/ 



