25. CIIEILAXTHES, PHYSAPTEKIS. 139 



ovate-lanceolate, tripinnatifid ; lower pinnce rather remote, deltoid ; pinnl. ^-f in. 

 1., cut down to the rachis into oblong lobed segm. ; rachis polished like the 

 stipe, but more or less tomentose ; texture subcoriaceous, upper surface naked, 

 very convex in the mature fertile frond, under surface tomentose like the rachis; 

 sor'i marginal. Hk. Sp.Z.p. 92. t. 102. A. 



Hab. Cape Colony ; discovered by M. Drege. It resembles C. lanuginosa and Szovitzii 

 in size and general appearance, but is naked on the upper surface, and not at all matted 

 beneath. 



38. C. lanuginosa, Nuttall ; st. densely tufted, erect, wiry, polished, dark 

 chesnut-brown, thinly clothed with spreading woolly hairs"; fr. 4-8 in. L, 

 ?.-! in. br., ovate-lanceolate, bipinnatifid ; pinnce in opposite pairs, the lower 

 ones deltoid ; pinnl. lineai'-oblong, contiguous, cut down to the rachis into 

 numerous small roundish or oblong segm. ; rachis tomentose ; texture sub- 

 coriaceous ; upper surface grass-green, slightly tomentose ; lower surface densely 

 matted with a coat of pale-brown woolly tomentum, the margin of the segm. 

 much incurved ; sori copious, marginal. C. lanosa, Moore. C. vestita, Hk. &p. 

 2. p. 99. C. gracilis, Riehl, Fee, Gen. Fil. 149, oldest name. 



Hab. Illinois and Wisconsin westward and southward to the Kocky Mountains, Cali- 

 fornia, and New Mexico. 



39. C. Szovitzii, Fisch. & Meyer ; st. densely tufted, erect, wiry, polished, 

 chesnut-brown, thinly coated with spreading woolly hairs, mixed with linear 

 scales ; fr. 3-6 in. 1., 1-1^ in. br., ovate-lanceolate, bipinnatifid ; pinnce in 

 opposite pairs, the lower ones deltoid ; pinnl. linear-oblong, contiguous, cut 

 down to the rachis below into small roundish beaded segm. ; rachis scaly and 

 tomentose like the stipe; texture subcoriaceous; upper surface green, slightly 

 tomentose ; lower surface densely matted with a coat of pale-brown woolly hairs, 

 the margin of the segm. much incurved ; sori copious, marginal. Hk. Sp. 2. 

 p. 98. t. 98. C. fimbriata, Visiani. C. persica, Mett., oldest name. 



Hab. Asia Minor and Persia southward to N. Hindostan, ascending in the Himalayas 

 to 8,500 ft., Italy and Dalmatia. Very near C. lanuginosa, from which it only differs 

 by having distinct scales mixed with the tomentum upon the stipes and rachis. Notho- 

 Icena persica, Bory, is this species. 



40. C. gracillima, Eaton ; st. densely tufted, 2-6 in. 1., wiry, slender, dark 

 chesnut-brown, polished, only slightly scaly towards the base ; fr. 3-4 in 1., 

 1 in. br., narrowly ovate-lanceolate, bi- or tripinnatifid ; lower pinnae opposite, 

 lanceolate-deltoid, about \ in. 1., \ in. br., cut down to the rachis into several 

 linear-oblong segm. on each side, the largest of which are in. 1., and the lowest 

 again slightly divided ; texture subcoriaceous ; rachis slightly fibrillose ; upper 

 surface naked, the lower densely matted with pale-brown woolly tomentum, the 

 margin of the segm. much incurved ; sori copious, marginal. Eaton in Report 

 Mex. Bound. Survey, vol. 2. p. 234. C. Feei, Moore. 



Hab. British Columbia, Oregon, California, Missouri, New Mexico, Guatemala. A 

 much less hairy and less divided plant than C. lanuginosa, with larger and less distinctly 

 beaded segments. 



41. C. Fendleri, Hk. ; st. scattered, 2-4 in. 1., wiry, chesnut-brown, polished, 

 slightly scaly ; fr. 3-4 in. L, 1-1^ in. br., ovate-lanceolate, tripinnatifid ; pinnce 

 lanceolate-deltoid, about f in. 1., f in. br. ; pinnl. linear-oblong, cut down to the 

 rachis into numerous small oblong beaded segm. ; rachis densely clothed above 

 with lanceolate acuminate entire scales, which are bright reddish-brown in the 

 centre, silvery-white towards the edge ; upper surface quite naked, under surface 

 scaly only, not matted; texture subcoriaceous, margin much incurved; sori 

 copious, marginal. Hk. Sp. 2. p. 103. t. 107. B. 



Hab. Rocky Mountains southward to California and New Mexico. 



