FiLiCEs. (ferns.) 663 



10. CAMPTOSORUS, Link. Walking-Leaf. (PI. 17.) 



Fruit-clots oblong or linear, as in Aspleniuni, but irregularly scattered on 

 either side of the reticulated veins of the simple frond, those next the midrib single, 

 the outer ones inclined to approximate in pairs (so that their two indusia open face 

 to fivee), or to become continent at their ends, thus forming crooked lines (whence 

 tlie name, from Kafxnros, bent, and (rcopor, {or fruit-dot.) 



1. C. rhizophyllus, Link. (Asplenium rhizopliyllum, L. Antigram- 

 nia, ./. Smith, Turr. Also C. rumicifulins, Link.) — Siiadcd calcareous rocks, 

 W. New England to Wisconsin, and southward : rare or local. July. — Fronds 

 evergreen, growing in tufts, spreading or procumbent (4' -9' long), lanceolate 

 from an anricled-hcart-shaped or often hastate base, tapering above into a slender 

 prolongation like a runner, which often roots at the apex and gives rise to new 

 fronds, and these in turn to others ; hence the popular name. — A singular form 

 is found at Mount Joy, Pcnn., by Mr. Staujj'er, having roundish fruit-dots and 

 inconspicuous veins. 



11. PHEGOPTERIS, Fee. (Sp. of Polypodium, L.) Beech-Ferx. 



Fruit-dots small, round, naked (no indusium), borne on the back of the veins 

 below the apex. Stipe continuous with the rootstock. — Our species have free 

 veins and bright-green membranaceous fronds, decaying in early autumn. 

 (Name composed of cprjyof, an oak or beech, and wrt pis, fern.) 



* Froiuh tiuicp. pinnaf.ijid: pinna: all sessile, adnate to the wincjed rliachis. 



1. P. polypodioides, Fc'e. Fronds triangulaf, /oh/zc/- than broad (4' -9' 

 long), hairy on the veins, especially beneath; pinnae linear-lanceolate, the lowest 

 pair deftexed and standincj forwards ; their divisions oblong, obtuse, entire, the 

 basal ones decurrent and adnate to the main rhachis ; fruit-dots all near the 

 margin. (Ph. vulgaris, Mtttenius. Polypodium Phegopteris, L., and iormer 

 ed. P. conne'ctile, Michx.) — Damp woods: common northward. July. — 

 Kootstock slender, creeping, bearing a few distant slender stalks, rather longer 

 than the fronds. (En.) 



2. P. hexagonoptera, Fee. Fronds triangular, usnalli/ broader than long 

 (7'- 12' broad), slightly pubescent and often finely glandular beneath; pinnce 

 lanceolate; upper segments oblong, obtuse, toothed or entire, those of the veri/ 

 large lowest pinnce elongated and pinnatelij lolicd, basal ones very much decurrent 

 and forming a continuous many-angled wing along the main rhachis ; fruit-dots 

 near the margin ; some also between the sinus and the midrib. (Polypodium 

 hexagonopterum, Michx. ) — Rather open woods : common, especially southward. 

 July. — Larger and broader than the last, which it often closely resembles. 



* * Fronds ternate, the three divisions pet iolid : rhachis loingless. 



3. P. Dryopteris, Fc'e. Fronds smooth, broadly triangular (4' - 6' wide) ; 

 the 3 triangular ])rimary divisions widely spreading, 1 -2-pinnate; segments ob- 

 long, obtuse, entire or toothed ; fruit-dots near the margin. (Polypodium Dry- 

 optei-is, Z.) — Pocky woods : common northward. July. (Eu.) (P. c'alcare.\, 

 which is more rigid, and minutely glandular-mealy, especially on the rliachis 

 and midrib, is to be bought for northward.) 



