TORTULA. 189 



along the stem and at the summit of the branches, spreading, 

 hardly if at all recurved, large, broadly oblong-elliptic, obtuse, 

 rounded, sometimes emarginate at apex ; margin revolute to or 

 somewhat above the middle ; nerve stout, red, excurrent in a 

 hyaline, slightly toothed hair-point. Upper cells quite as large 

 as in T. ruralis, more pellucid and less obscure, papillose, one 

 row at margin often slightly distinct, compressed and transversely 

 elliptical, rather more opaque. Capsule cylindric, slightly curved, 

 long, dark brown. Synoicous. 



Hab. Rocks and walls, rarely tree-trunks, usually in mountainous districts. 

 Rare. Fr. spring. 



This very handsome moss is readily distinguished from T. rttralis by the interrupted 

 stems, and the leaves not recurved, with slender, faintly-toothed hair points. Starved 

 plants come near T. intermedia, but the large size of the cells will at once distinguish 

 them, as well as their much greater distinctness. The margins too, are more distinctly 

 recurved. The synoicous inflorescence is also an important character. 



20. Tortula papillosa Wils. (Barbula papulosa C. M., 

 Schp. Syn.) (Tab. XXVIII. I.). 



Short, rarely £ inch high ; dark or olive green, in very small 

 tufts or patches. Leaves spreading, when dry appressed to the 

 stem and hardly twisted, concave with the margins involute, 

 becoming still more so when dry, broadly obovate-spathulate , at 

 apex rounded and obtuse or very shortly pointed ; nerve thick, 

 spongy, at back covered -with very elevated papillas, gemmiparous 

 above in front ; excurrent in a mucro or longer cuspidate almost 

 entire point ; cells at base rectangular, a few only hyaline ; above 

 rounded, larger than in the preceding plants of this section, with 

 rather thick walls, pellucid, smooth in front, at back sparsely and 

 shortly papillose. Capsule short, on a short seta, reddish brown. 



Hab. Trunks of trees ; not uncommon. Sterile in Britain. 



A quite distinct and easily known species, nearest to T. Icevipila, but readily 

 known by the gemmce and the concave leaves with involute margins, and very different 

 areolation. The gemmae are oval or roundish articulate bodies of a bright yellowish 

 green, very numerous and conspicuous on the younger leaves, but usually lost on the 

 older ones. 



The fruit has only been found in Australia and New Zealand. 



Tribe 2. Trichostomese. 



Leaves usually lanceolate, tapering and acute, rarely-oblong 

 in outline ; upper areolation very small, rounded or angular, 



