39° HYPNACE/E. 



suddenly piliferous, nerveless. Areolation narrow, vermicular \ 

 Flowers and fruit unknown. 



The position of this genus must remain doubtful in the 

 absence of fruit. From the areolation, however, it is certainly- 

 more at home in the Hypnacea? than under Leucodon, with which 

 it was formerly united. 



1. Myurium Hebridarum Schp. (Leucodon Lagurus var. 

 borealis Wils.) (Tab. LI. G.). 



Primary stem prostrate, with numerous erect divisions, simple 

 or slightly branched, thick, tumid, obtuse, golden yellow- Leaves 

 in many rows, rather large, cochleariform, shining, loosely 

 imbricated, oblong, suddenly contracted to a long, linear-piliform 

 point, excavate at base; margin involute above, finely denticulate 

 throughout its length, most closely and distinctly at apex and at 

 basal margin ; nerve faint or none. Cells very narrow, linear, 

 the walls incrassate and perforated by pores, at basal angles 

 gradually shorter and wider, hexagonal, but not forming auricles. 



Hab. Outer Hebrides, on damp rocks near the coast. 



A very remarkable and curious plant, both in structure and distribution. Its- 

 only other known station is in the Canaries. The leaves are somewhat like those of 

 Eurhynchium cirrosum, but are nerveless, with wider points, and the whole plant is- 

 much larger and stouter. It could not be confounded with any other species. 



104. PYLAISIA B. & S. 



Plants of arboreal habitat, growing in intricate, silky tufts. 

 Stems prostrate, rooting, not stoloniform. Leaves small, ovate- 

 lanceolate, longly acuminate , nerve short or none. Seta smooth. 

 Capsule erect, elliptic-oblong or cylindric ; peristome well 

 developed, cilia rudimentary, single. Autoicous. 



A genus of several species, similar in habit and leaf-form, and 

 also characterised by the autoicous inflorescence. 



1. Pylaisia polyantha B. & S. Leskea polyantha Hedw. - f 

 Stereodon polyanthos Lindb.) (Tab. LI. I.). 



Stems prostrate, irregularly divided, in small silky tufts f 

 hardly one inch high, dull yellowish green. Secondary stems 

 closely pinnate, the branches erect or ascending, short. Leaves 

 erect or secund and pointing upwards, small, less than half a line 

 long, narrowly ovate, rather rapidly contracted into a tapering 



