288 BARTRAMIACEiE. 



brown at the insertion, a few at the angles more lax and quadrate. 

 Capsule on a straight seta, about half-an-inch long, smaller than 

 in B. pomiformis f'/i line in diameter) , suberect or slightly 

 cernuous, a little elongated when dry and empty, finely striate. 

 Lid small, conical. Peristome double. Synoicous. 



Hab. Mountain rocks, usually those which are calcareous. Not common. Fr. 

 early summer. 



This species is readily distinguished by its smooth leaves, shorter, and more 

 shortly pointed than in most of the allied species, without a distinct leaf-base. The 

 capsule also is smaller and less deeply striate, and the whole plant more slender. 



The serratures of the leaf are usually in two rows, being on the apparent edge, 

 where the margin is folded back, as well as on the actual margin. 



2. Bartramia stricta Brid. (Tab. XL. E.). 



Densely tufted, short, about i inch high, glaucous green. 

 Stems straight, rigid, tomentose below. Leaves almost erect, 

 when dry closely appressed, short (i% lines) , straight, rigid, 

 fragile, quickly narrowing usually from the very base, lanceolate- 

 subulate, margin slightly recurved above the base, towards apex 

 finely but acutely denticulate; nerve strong, yellowish, excurrent 

 in a cuspidate point ; areolation narrow and dense, papillose ; the 

 upper shortly and very narrowly rectangular, at base larger, 

 pellucid, a few rows at margin wider, quadrate. Seta erect, 

 slender, pale, faintly angular above ; capsule erect, symmetrical, 

 small, oval-globose, narrowly striate ; lid convex ; peristome 

 simple. Synoicous. 



Hab. On earth or rocks. Near Maresfield, Sussex ( ' Davies). Fr. spring. 



B. stricta is a southern species, only known in this country from the above 

 locality. In its straight rigid leaves it is only approached by B. ithyphylla, which is 

 quite distinct in its longer areolation, and in the well-marked, sheathing leaf-base ; in 

 some respects, indeed, the present species more resembles in appearance a species of 

 Campylopus than a Bartramia. 



The base of the leaf in this species is of a rather unusual, almost triangular 

 shape, owing to its rapid narrowing from the line of insertion. 



3. Bartramia ithyphylla Brid. (Tab. XL. D.). 



Densely tufted, 1-2 inches high, silky, bright glaucous green 

 or yellowish; leaves crowded, 2-2 l / 2 lines long, divergent from 

 an erect, sheathing, glossy, white, scariose base, straight and rigid ; 

 when dry erect and straight, rarely slightly flexuose ; limb very 

 narrowly linear-subulate, suddenly contracted above the oblong 

 base, which is wider at the shoulders than at the insertion ; margin 

 plane, sharply and closely denticulate above ; nerve strong, 



