GRIMMIA. 133 



erecto-patent ; when dry appressed, slightly and rigidly contorted ; 

 rather glossy, elongate-lanceolate, with a strong brownish point, 

 chiefly formed of the nerve, not hyaline ; margin plane above, 

 slightly reflexed at the base, entire, except at apex, where it is 

 sparingly crenulate-papillose ; nerve strong, reaching apex or 

 slightly excurrent ; cells shortly rectangular and pale at mid- 

 base, quadrate at margin, soon becoming quadrate, in upper part 

 of leaf rounded-quadrate, opaque, in two or three strata. 

 Autoicous. Perichffitial bracts sub-falcate, nerve excurrent. 

 Capsule immersed in the perichstium, pale brown, oval-globose, 

 wide-mouthed and turbinate after the fall of the lid; peristome as 

 in G. apocarpa, but with broader, more solid, slightly perforated 

 teeth. 



Hab. Rocks by the sea ; frequent on the west coast, rare on the eastern" side. 

 Fr. winter. 



G. maritime/, is easily known by its more rigid habit, narrower, solid leaves with- 

 out hyaline points, strong nerve, etc. ; it is one of the very few mosses which can 

 really be called maritime, growing as it does often close to high water mark and with- 

 in reach of the spray, on siliceous and basaltic, rarely or never on calcareous rocks. 

 It appears to be confined to the northern shores of the Atlantic Ocean. 



B. GASTEROGRIMMIA. 



Capsule immersed on a curved seta, oval, slightly ventricose 

 on one side at base. 



3. Grimmia anodon B. & S. (Tab. XXI. G.). 



In small cushions, about \ inch high ; hoary with the hair- 

 points of the leaves ; stems slender, fragile, brownish. Lower 

 leaves small, muticous, ovate-lanceolate, upper larger, broadly 

 oblong-lanceolate or obovate-oblong, narrowed at apex or obtuse, 

 concave, margin plane, apex prolonged into a rather long, flat, 

 denticulate hair, below which the apex of the leaf, frequently for 

 some distance, is also hyaline, a narrow hyaline band sometimes 

 descending still further at each margin ; nerve narrow, thickened 

 above, prolonged into the hair-point, but indistinctly. Cells at 

 base lax, long, rectangular, hyaline, with thin walls, above 

 minute, rounded-quadrate, incrassate, chlorophyllose, in regular 

 longitudinal rows. Capsule small, sub-globose, ventricose at 

 base on one side, on a very short arcuate seta, thin-walled, 

 gymnostomous, wide-mouthed when dry ; calyptra very small, 

 mitriform, lobed at base ; lid large, mamillate. Autoicous. 



