78 MUSCI-PLEUROCARPI-PERISTOMI. [Hi/pmim. 



datur exemplum tantae inconstantiae nervi in ullo Hyjmo ," for dif- 

 ferent leaves on the same individual have the nerve varying much in 

 length, and to me, in the older stems, the nerve, of a dark brown colour, 

 seems to reach quite to the point ; but Mr. Wilson observes that it 

 always vanishes below it. In others, the nerve almost totally disap- 

 pears and then the plant becomes the H. subtile of British authors, not 

 Leskea subtilis of Hedw. which has the true fringe of a Leskea and has 

 not, that I am aware, yet been found in Britain. For further remarks 

 on this variable species see the Muscologia Britannica, ed. 2. 



** Leaves serrated. 



2. H. populeum, Hedw. (matted Feather-Moss); leaves erect 

 lanceolate acuminated serrated the margin slightly reflexed, the 

 nerve reaching to the point, capsule ovate subcernuous, lid 

 conical. Hedw. Sp. Muse. t. 70. f. 1 — 6. Hobs. Br. Mosses, v. 1. 

 n. 69. Drum. 31usc. Scot. v. 1. n. 78. Schwaegr. Suppl. v. 1. 

 P. II. p. 238. Muse. Brit. ed. 2. p. 157. t. 24. — H. implexum, 

 Sicartz.— Turn. Muse. Hib.p. 173. t. 16. Fl. Brit. p. 1310. E. 

 Bot. t. 1584. 



On stones in shady situations, less frequently on trees. Fr. Nov. 



10. H. reflexum, Web. (reflexed Feather -Moss); leaves cor- 

 dato-acuminate serrated the margin slightly reflexed, the nerve 

 reaching to the point, capsule ovate cernuous, seta rough, lid 

 conical. Web. et Mohr, Cr. Germ. p. 306, et 476. Schwaegr. 

 Suppl. v. 1. P. II. p. 161. t. 143. 



On Ben Nevis, near the base of the mountain ; on Ben Lawers, Dr. 



Greville. Fr. . — British specimens quite accord with original ones 



from Starke. In habit, they differ considerably from the last species, 

 being more straggling in the growth, the leaves are broader and snorter, 

 especially those of the main stem, which are broadly cordate with a sud- 

 denly acuminated point. 



b. Nerve shorter than the leaf, or none. 



* Leaves entire. 



j- Leaves ovate or elliptical. 



11. H. molle, Dicks, (soft water Feather-Moss); stems creep- 

 ing, branches erect, leaves loosely imbricated patent rotundato- 

 ovate rather acute concave entire faintly 2-nerved at the base 

 or with one short nerve, capsule ovate cernuous, lid conical. 

 Dicks. Cr. Fasc. 2. t. 5. /. 8. Hedw. Sp. Muse. t. 70. /. 

 7—10. Fl. Brit. p. 1312. E. Bot. 1. 1992. Hobs. Br. Mosses, 

 v. 2. n. 56. Drum. Muse. Scot. v. 2. n. 64. Schwaegr. Suppl. 

 v. 1. P. II. p. 220. Muse. Brit. ed. 2. p. 158. t. 24. Grev. Scot. 

 Or. Fl. t. 283. 



Alpine rivulets, in Scotland; Aber, N. Wales; Mr. Wilson, (the 

 station since destroyed.) Fr. June. — Plant tufted and the short branches 

 (2 — 3 inches high) erect, bare of foliage below. Leaves of a thin 

 membranaceous texture, generally very dark lurid green, concave, 

 varying in the nerve which is either single or double. This, indeed, 

 comes very near to H. alpestre, which is, however, more rigid in tex- 



