FissiDENTACE^.] 75 [Fissidcfis. 



Seta very short, terminal ; perich. bracts resembling the leaves, but 

 longer ; capsule small, erect, pachydermous, narrowly oval, olivaceous ; 

 lid conical, obtuse ; teeth of peristome erect, coarsely articulated, 

 toward apex formed of spiral fibrils. Male plant shorter with terminal 

 inflorescence, bracts obovate, dilated, with a short sword-shaped lamina. 



Hab. — In streams, attached to rocks and stones. River Lune in Rigmaden 

 Park, Westmoreland (P. Dreesen). 



This interesting addition to our Flora has been found at the Rhine 

 Falls, and at Salzburg, and we have no doubt it is also the same as the 

 Californian F. ventricosus of Lesquereux. The capsules on our specimens are 

 old and without operculum, and we have completed the drawings of these 

 parts from Sullivant's figures. Our plants grow associated with CinclidoUts, 

 those in the Rhine with Fiss. gyandifrons, and the older leaves are generally 

 worn and abraded by the current. 



9. nSSIDENS SERRULATUS Bnd. 



Dioicous ; stem tall, simple; leaves about 20-jugous, straight, 

 Ungulate, the margins serrulate with prominent cells, apex acute serrate. 

 Capsule terminal inclined, oval-oblong, subventricose ; lid conic, long- 

 beaked. (T. XI, C.) 



Syn. — Fissidetis serndatus Brid. Sp. muse, i, 170 (1806) ; Mant. muse, igo (1819), et Bry. univ. 



ii, 704 (1827). Mont, in Ann. Se. nat. et in Hist. nat. des Isles Can. par Webb & Berth. 



iii, 22, t. 2, f. I (1840). C. MuELL. Syn. muse, i, 6g (1849). Schimp. Bry. Eur. vi, Suppl. 



T. 3 (1851) ; Syn. 107 (i860) et 2 ed. 117 (1876). 

 Schistophyllum serratum Brid. MSS. 

 Fiss. divisus Kunth. 



Fiss. asplenioides var. serrulatus WiLS. Bry. brit. 306. 

 Fiss. Langei De Not. Epil. briol. ital. 479 (i86g). 



Dioicous ; laxly csespitose, tall, simple or with many stems from 

 base ; stem simple or sparingly branched i — 3 in. high. Leaves 

 crowded, multijugous, increasing in size upward, flat, glossy, pale green, 

 coriaceo-membranous, Ungulate, shortly acuminate at apex, which is 

 often irregular and bent to one side ; nerve thick, subflexuose, yellowish, 

 vanishing in the eroso-serrate acute apex ; vag. lam. about half length 

 of leaf, inf. lam. linear, abruptly and narrowly decurrent at base ; all 

 margin with a border of four rows of rather larger yellowish cells, more 

 distinct in the older leaves, without chlorophyl, minutely crenulate; 

 rest of the areolation small rounded and angular. Fruit terminal on 

 the stem or on a lateral innovation, rooting at the perichsetium, and 

 finally deciduous and forming a distinct plant ; capsule on a short stout 

 yellow flexuose pedicel, cernuous, oval, fulvous brown, pachydermous, 

 contracted below the mouth when dry ; lid large, conic with a longish 

 straight beak ; teeth large, deep purple, cleft into two longly subulate 



