WEISSIEI. 289 



3. S. tristicha, Br. Schimp. ; densely tufted ; leaves 

 tristichous, crowded, rigid, narrowly lanceolate, blunt, whitish 

 at the base ; sporangium subspherical ; neck swollen, truncate 

 when the rostrate lid has fallen ; teeth narrow. Bryol. Eur* 

 t. iii. 



On calcareous rocks. Blair Athol. 



The exactly tristichous arrangement of the leaves is cha- 

 racteristic of this species. 



4. S. recurvata, Br. fy Schimp. ; tufted ; stems very short ; 

 leaves lanceolate-subulate from an oval or oblong base ; veil 

 rather large; sporangium drooping on a curved fruitstalk, 

 oval or oblong ; lid convex, ending in a short straight beak ; 

 teeth often bifid. Hook. % Wils. t. xv.; Eng. Bot. t. 1489, 2551. 



On rocks, especially sandstone. Bearing fruit in spring. 



Leaves somewhat waved ; sporangium erect when dry, rather 

 loosely cellular ; lid straighter, veil larger. Mr. Mitten has 

 another species, S. calcicola, which I have not seen, and which 

 by some is supposed to be the true Weissia pusilla of Bridel, 

 though Schimper thinks otherwise. 



103. BRACHYODUS, Nees % Hornsch. 



Sporangium erect, on a straight fruitstalk, small, furrowed 

 when dry ; ring broad ; veil conical, subcucullate ; peristome 

 single, of sixteen very short, truncate, equidistant, partly con- 

 fluent teeth. 



1. B. trichodes, Nees fy Hornsch. Hook. Sf Wils. t. xv. ; 

 Eng. Bot. t. 2563. ; (Plate 24, fig. 3) ; Moug. 8f Nest. n. 711. 



On moist sandstone or granite rocks. Generally in sub- 

 alpine countries. Bearing fruit in spring or late in the au- 

 tumn. 



Monoicous; very small. Leaves lanceolate-subulate, nerve 

 rounded, ex cur rent ; veil five-lobed at the base, one fissure 



u 



