4-7 cm. 1., rather distant in typical specimens; pinnules 
oblong, variously toothed or incised, i cm. more or less 1. 
F r e q u e n t i n w o o d s a n d t h i c k e t s . 
16. CAMPTOSQRUS Link, 1833. 
'> . . , ■ , ■ ^ 
Rock- loving ferns growing in colonies. T^eaves simple, 
rooting at the tips. Sori linear, scattered. 
I.e. rhizophyllus (L.) Link. PI. 2. 
Phyllitis parva saxatilis per summitates folii 
prolifera. Banister; Ray, Hist. 1926. 
Asplenium rhizophyllum L. Sp. PI. 1078. 
Camtosorti s rkizopkyllus l^ink^ Yioi't, Berol. 2: 
69. Eaton^ Ferns N. Am. i : 55. t. 8. f. i ; in 
Gray, Man. 6&^.Underw , in 111. Fl.i : 21 ; in 
Nat. Ferns 108 ; in Britt. Man. 13. C/^^/^?, Ferns 
265. Watei's^ Ferns 179. 
Walking Fejin. 
Low plants ; leaves in a cluster from the short root- 
stock, cordate, auricled or halberd-shaped and gradually 
•narrowed into a long i mm. or wider point, which is 
sometimes 1.5 dm. 1. The entire leaf is sometimes 2.5 dm 
long. - . 
On shaded limestone rocks. 
Near Baltimore, Steitz, Waters ; at CRhin John, Md., Ward; 
below Scott's Run, Potonirc River, Maxon ; Stony Man Mount. 
Ya., Palmer ; Mt. Crawford, Heller'^ Smyth Co., in several pla- 
ces, 71//* s 5 Vail, Small. 
38 
