104 20. LINDSAYA, § EULINDSAYA. 



Hab. Silesia, Sudetea of Moravia, and the Carpathians.— Tliis species combines the 

 habit of C. montana with the texture of 0. fragUis. 



5. C> mxitann, Link ; rhiaome wide-creeping ; st. slender, erect, 6-9 in. I. ; fr. 

 alioiit G m. each way, deltoid, quadripinnatifid ; lowest pinnl. deltoid-lanceolate, 

 1-1^ in. 1., |-f in. br. ; segm. cut down to the rachis below, the lobes oblong, 

 2 lin. 1., 1 lin. br., deeply and sharply toothed ; texture thinly herbaceous ; sori 

 small, 18 to 24 to the lower segments.— l?ii;. jSp. 1. p. 200. Brit. Ferns, t. 25. 



Hab. Mountains of Scandinavia, Scotland (very rare), and Central Europe ; Kam- 

 BChatka, east side of the Eoclty Mountains, N. America, Labrador, Canada West. 



Tribe 5. Lindsayb/e. 



Sori placed in a line at or very near the edge of the frond, covered with an 

 involucre, the inner valve of which is membranaceous, the outer (^obsolete in Dicty- 

 oxiTphmia) formed of the margin of the frond. Gen. 20-20*. 



Gen. 20. l,mT>ikY A, Dryand. (See page 471.) 



Sori margins,! or suhmarginal, placed at the apex of and uniting two or more 

 veins. Invol. double, opening outwardly, the inner valve membranaceous, the 

 outer formed of the more or less changed (scarcely changed in DielUa and some 

 other species) margin of the frond. A moderately extensive genus, only a few 

 species of which pass outside the tropics, most, but not all, the species of which have 

 one-sided pellucido-lierbaceous or coriaceous pinnce, approximating in shape to a 

 quarter of a circle. Tab. II. f. 20. 



§ 'K\iMnii3,ya:.-',P'i'i^n<E unilateral, veins free. Sp. 1-25. A well-marked section, 

 which has its head-quarters in Tropical America, Asia, and Polynesia, but reaches 

 the Mauritius, Ja/pwn, and Australia, with the habit q/Adiantum, with fronds often 

 pellucid. 



t Main rachis vnbranched. Sp. 1-12. 



1. L. linearis, Swartz ; rhizome wiry, creeping ; st.' wiry, flexuose, black, 

 shining, 4-8 in. 1. ; fr. 6-12 in. 1., ^ in. br., simply pinnate ; pinnce 3 lin. 1., 

 2 lin. deep, the upper edge very slightly toothed, the lower ones with often a 

 considerable space between them ; texture thickly pellucido-herbaceous ; sori in 

 a continuous line along the upper edge. Sk. Sp. \. p. 206. 



Hab. Australia, Van Diemen's Land, New Caledonia, and New Zealand. — 

 Pinnules often distingtly flabellate in shape, readily curling up wjien dry. It has much 

 the smallest pinnae of the unbranched group. 



2. L. falciformis, Hk. ; rhisome short-creeping ; st. very short, close together ; 

 fr. 3-4 in. 1., ^- j in. br., simply pinnate ; pinnce 4 lin. 1., \ in. deep, distinctly 

 falcate towards the outside, both margins entire, close together, but not imbri- 

 cated ; texture pellucido-herbaceous ; the costal v&,n parallel with the lower edge 

 at a short distance from it ; sori in a continuous marginal line. — Hh. Sp. 1. 

 p. 208. t. 64. B. 



Hab. British Guiana ; gathered by Sir E. Schomburgk. — A very doubtful plant, 

 perhaps young, unbranched L. trapeziformis. 



3. L. adiantoides, J. Sm. ; st. nearly tufted, black, polished, wiry, 1-2 in. 1, ; 

 fr, 4-6 in. 1., about 1 in. br., simply pinnate ; pinnce ^ in. 1., ^ in. deep, the upper 

 imbricated, the lower edge straight or slightly curved, the upper rounded and 

 broadly lobed about one-third of the way down ; texture pellucido-herbaceous ; 

 imi marginal in the lohes. — HL Sp. I. p. 204. t. 61. C. L. humilis, Kuhn. 



