FERN FAMILY. 





8. SCOLOPENDRIUM Adans. Fain. PI. 2: 20. , : 



Large ferns with oblong or strap-shaped mostly entire leaves, ami linear elongated tori 

 which are almost at right angles to the midrib and contiguous in pain, one on the upper 

 side of a veinlet, the other on the lower side of the next contiguous vnnlct, thus appearing 

 to have a double indusium opening longitudinally along its middle. Sporanges pedicelled 

 the ring vertical, bursting transversely. [Greek, in allusion to the ccmij,c,le, Scolofif. 



Five species, mainly of temperate regions. Only UK- following i" kn.,/ 

 America. 



i. Scolopendrium Scolopendrium 



1 L. ' K;ir>t. HartVttuiKUc. Fig. 44. , 



AsplettiumScotopemdtimml , i7 



Scnlnfifinh-iitm 



Acacl. Tor. 5 : 

 Scolopendrium .s< If>cndt nun Kamt Deotach. 



Fl. 



Rootstock short, erect or ascending. chaffy 

 with light brown scales. Stipe ^ 

 fibrillose-chaffy below or sometimes up to 

 the base of the leaf; leaves simple, bright 

 green, firm, 7'-iS' long, i'-2tf' wide, cor- 

 date at the base, the margins entire or un- 

 dulate, the lower surface of the midrib some- 

 times chaffy; pairs of son distinct. 

 long ; conspicuous on the lower surface, the 

 sporangcs dark brown at maturity ; vein* 

 free, usually once forked near the midrib. 



On shaded clifTsnf tin- cnrnift ru limcttoor. 

 ChittenangO Fulls and Janiesvillc. N : 

 South I'ittsburg. Tenn.: Uwen S-uii' 

 New Brunswick and Mexico \V 

 uted in KurojK.-. A-ia ami Africa Vi-ry variable 

 in form in the Old World. 



9. CAMPTOSORUS Link, Hort. Berol. 2: 69. 1833. 



Slender ferns with tapering simple entire or undulate leaves, bearing linear or oblong 

 sori several times longer than broad, irregularly scattered on either side of the reticulate 

 veins or sometimes crossing them, partly parallel to the midrib and partly oblique to it, the 

 outer ones more or less approximate in pairs. Indusium membranous. Sporanjjes pedi- 

 celled, provided with a vertical ring which opens transversely. [Greek, referring to the 

 bent or curved sori.] 



Two species, the following of eastern North America, the other of t orthcrn Asia. 



i. Camptosorus rhizophyllus (I,.) 

 Link. Walking-fern. (Fig. 45.) 



Aspleniutn rhizophylla L. Sp. PI. 1078. 1753. 

 Camptosorus rhizop/iyllus Link, Hort. Berol. 2 : 



69- 1833- 



Rootstock short, usually creeping, somewhat 

 chaffy. Stipes light green, i'-6' long, tufted, 

 spreading ; leaves rather thin, lanceolate, sim- 

 ple, long-acuminate at the apex, cordate, has- 

 tate or rarely narrowed at the base, 4 / -9 / long, 

 sometimes with a more or less elongated pair 

 of basal auricles ; tip of the leaf and sometimes 

 the tip of one or both of the basal auricles root- 

 ing and forming a new plant by the ultimate 

 withering away of its tissue, but commonly 

 two or sometimes as many as four plants arc 

 found connected ; sori usually numerous, very 

 irregularly scattered on the lower surface. 



On dry rocks, preferring limestone, Quebec to 

 Ontario and Minnesota, south to North Carolina 

 and Kansas. Ascends to 2500 ft. in Virginia. 

 Aug. -Oct. 



