BRYUM. 317 



/Leaves twisted when dry, tufted at ends of branches 22. Donianum 



\ Leaves narrower, scarcely twisted, rather decurrent, often reddish 11. pallem 



j x /Capsule turbinate and much constricted below mouth when dry ...14. turbinatum 

 \ Capsule not markedly constricted below the mouth E (p. 326) 



{ 



A. ANOMOBRYUM. 



Ls. wide-ovate, obtuse or apiculate, not nerved to apex /. filiforme 



Ls. narrower, more acute, nerve usually reaching apex /* concinnatum 



1. Bryum filiforme Dicks. (Anomobryum nonnull. auct. ; 

 Bryum julaceum Sm., plur. auct.) (Tab. XLII. L.). 



In dense tall tufts, 2-4 inches high, pale glossy green or 

 yellowish, pale brown below, stems and branches slender, filiform, 

 rather rigid, julaceous, with the leaves appressed and closely 

 imbricated, hardly altered when dry, concave, oval or oval-oblong, 

 obtuse or shortly and obtusely apiculate, margin plane, entire or 

 obsoletely denticulate at apex, nerve yellowish, vanishing at or 

 some distance below the summit ; cells somewhat variable in 

 width, the basal shortly and widely rectangular or sub-hexagonal, 

 the upper linear-rhomboid, or narrowly linear-vermicular, 

 incrassate. Comal leaves of the fertile stems longer, ovate- 

 lanceolate, acute. Seta red, about 1 inch long. Capsule sub- 

 pendulous, clavate, very slightly decurved, neck tapering, shorter 

 than the capsule itself, altogether i|-2 lines long, reddish brown, 

 hardly contracted below the mouth when dry, lid mamillate,. 

 smooth, glossy. Peristome pale brown, small ; cilia appendiculate. 

 Dioicous. Male flowers gemmiform. 



Var. fi. juliforme (Anomobryum juliforme Solms. ; Bryum 

 juliforme Schp., Braithw. Br. M. FL). Shorter, more compact, 

 yellowish. Leaves narrower, slightly apiculate, point recurved; 

 upper cells narrower , more incrassate. Capsule slightly smaller, 

 less pendulous, usually horizontal . 



Hab. Wet rocks in mountain streams, common. The var. $ among rocks in 

 drier places in the south ; Carbiss Bay, Cornwall, sterile (Curnow). Fr. rare, late 

 summer and autumn. 



A very distinct species, with little resemblance to any other moss but the sub- 

 spec, concinnatum ; B. argenteum differs in the less glossy, softer tufts, with the apex 

 of the leaves white and diaphanous, and the cells quite different ; Plagiobryum Zierii 

 is known by the reddish tinge of the plants and by other points detailed under that 

 species. 



The var. juliforme appears to be little more than a stunted form growing in drier 

 and hence less favourable habitats ; even in the typical plant there is considerable 

 variation in the length and width of the cells and the apex of the leaves, and at the 

 most, the differences exhibited by the variety in these respects are very slight. It is 

 in some degree intermediate between the type and the sub-species concinnatum. 



