14. ASPLENIUM Diosc. 
The name ‘‘Asplenon” appears to have been applied 
by the ancients to Aspleniumceterach. The other spe- 
cles were known under various names, as Adiantum- 
nigrum, Lonchitis, Phyllitis, Ruta-muraria, Tricho- 
manes &c. 
Mostly rock-loving plants. Leavesvarious. Sori lin- 
ear, situated along the free veinlet. 
t Leaves pinnatifid, sometimes pinnate. 
* Lobes usually rounded. 
1. A. pinnatifidum Nutt. Pl 3: 
Asplenium pinnatifidum Nutt. 1818. Gen. 2: 251. 
Flaton, Ferns N. Am. 1: 61. t. 8. f. 2; in Gray 
Man. 683. Underw. in lll. Fl. 1: 22; Nat. Ferns 
103; in Britt. Man. 11. Clute, Ferns 167. Waters 
Ferns 130. 
SPLEENWORT. 
Low plants with the habit of Camptosorus rhizophyl- 
Zus; leaves lanceolate, 6cm. or longer, apex attenuate, 
lobes unequal, usually rounded; sori irregular. 
In crevices of rocks. Aoril-July. 
Collected in several localities in Pennsylvania, West 
Virginia and Tennessee, but apparently rare in our reg- 
ion. eee a 
30° 
