CAMPYLOPUS. 97 



rows of cells, median cells mostly of the opaque, incrassate form, 

 the dorsal series larger, grooved at back ; auricles distinct, 

 coloured, inflated ; basal cells rectangular, quickly becoming 

 obliquely rhomboid and elliptic, in all the upper part of the leaf 

 narrowly oblong or linear, vermicular. 



Var. /?. falcatus Braithw. More robust, shorter ; leaves 

 falcato-secund or regularly circinate. 



Var. y. epilosus Braithw. More slender ; leaves shorter, the 

 hair-points almost entirely wanting. 



Hab. Rocks and bogs on moors and mountains. Fruit unknown. The var. /3 

 in Western Ireland, and Skye. The var. y rare, England ; Wales. 



A handsome moss, almost always recognised at once by the blackish tinge which 

 is nearly constantly present in some degree and by the hoary leaf-points. These 

 latter are variable in length, and are also very fragile ; it sometimes happens, there- 

 fore, that they are inconspicuous and only to be found by careful search. They are 

 not fully developed until the leaves are mature, hence in the youngest leaves of all 

 they are short ; however, they will usually be found most distinct in the upper leaves, 

 as in the older ones they are frequently broken off. In the var. epilosus the upper 

 leaves show no trace of hyaline points, but are rounded-truncate and slightly cucullate 

 at apex ; a careful examination will, however, usually reveal a very short hair-point on 

 some of the older leaves. 



The var. falcatus in its typical form is a very pretty plant, with its leaves 

 beautifully circinate. Intermediate forms occur, but rarely. 



In the absence of obvious hair-points the distinct auricles taken in conjunction 

 with the narrow vermicular upper cells, and the dark colour, will readily distinguish 

 it. 



8. Oampylopus introflexus Brid. (Dicranum introflexum 

 Hedw. ; C . polytrichoides De Not., Schp. Syn.) (Tab. XVI. K.). 



Shorter, }i,-2 inches high, dense, rigid, dark olive or golden 

 green above, reddish brown below. Leaves crowded, rigid, 

 straight, imbricated when dry, shorter, from an oblong less concave 

 base shortly lanceolate-subulate with the margin incurved, tubular 

 above, entire ; nerve very broad, % width of base, excurrent in a 

 conspicuous hyaline denticulate arista, deeply grooved at back 

 above, with alternate furrows and ridges which may almost be 

 termed lamellae ; angular cells hyaline or reddish, rather wider 

 than the rest of the basal cells, forming indistinct, hardly 

 inflated auricles, which however are usually conspicuous in the 

 older leaves from their reddish brown coloration ; basal cells 

 small, rectangular, hyaline, passing obliquely upwards and out- 

 wards in a triangular marginal band ; very abruptly passing into 

 small, obliquely rhomboidal chlorophyllose cells, almost uniform 

 throughout the rest of the leaf. Capsules aggregated, hardly 

 furrowed, rugulose at base. Male plant simple, slender, the leaves 

 small and distant below, gradually enlarging to a coma at apex 

 H 



