84 MUSCI-PLEUROCARPI-PERISTOMI. [Hypnum, 



30. H. albicans, Neck, (whitish Feather-Moss); leaves erect 

 ovato-lanceolate acuminate faintly striated concave entire re- 

 volute at the margin, the nerve reaching half way, capsules 

 ovate cernuous, seta smooth, lid conical. Neck. Meth. Muse, 

 p. 180. Hediv. St. Cr. v. 4. t. 5. Turn. Muse. Hib. p. 171. 

 FL Brit. p. 1309. E. Bot. t. 1300. Hobs. Br. Mosses, v. 2. 

 n. 62. Drum. Muse. Scot. v. 2. n. 69. Muse. Brit. ed. 2. p. 167. 

 t. 25.— Dill. Muse. t. 42. /. 63. 



Hedge-banks, and on the ground, in sandy soils, frequent. Fr. Nov. 

 — This is of a pale colour, and is less branched than H. lutescens, which it 

 resembles in many points. Its leaves, however, are longer, more acum- 

 inate, softer and more patent. — The last 5 species have a very close 

 natural affinity, one with another. 



** Leaves serrated. 

 f Stems below bare of leaves. (Tree-like.) 



31. H. alopecurum, Linn, (fox-tail Feather -Moss); stems erect 

 simple and naked below fascicled above, leaves concave nar- 

 row ovate acute serrated reflexed at the margin, the nerve reach- 

 ing nearly to the point, capsule ovate cernuous, lid rostrate. 

 Linn. Sp. PL p. 1594. Turn. Muse. Hib. p. 163. E. Bot. 

 t. 1182. Schwaegr. Suppl v. 1. P. II. p. 265. Hobs. Br. Mosses, 

 v. 1. n. 77. Drum. Muse. Scot. v. 1. n. 86. Muse. Brit. ed. 2. 

 p. 168. t. 25. 



Woods and shady banks, common. Fr. Oct. — This and the follow- 

 ing species are among the largest and handsomest of our Hypna, and in 

 their upright and tree-like mode of growth differ remarkably from the 

 rest. A variety, however, of the present, growing in running water, is 

 branched from its very base, having the branches elongated and the 

 leaves more closely set and shorter. 



32. H. dendroides, Linn, (tree-like Feather -Moss); stems 

 erect below simple and naked fascicled above, leaves ovate often 

 more or less lanceolate serrated at the point, the nerve reaching 

 nearly to the summit, capsule ovato-cylindrical, lid rostrate. 

 Linn. Sp. PI. p. 1593. Turn. Muse. Hib. p. 138. Fl. Brit, 

 p. 1283. E. Bot. t. 1565. Hobs. Br. Mosses, v. 1. n. 78. Drum. 

 Muse. Scot. v. 1. n. 85. Muse. Brit. ed. 2. p. 168.*. 25.— Leskea 

 dendr. Hediv. — Neckera dendr. Sw. — Climacium dendr. Mohr. — 

 Schwaegr. Suppl. v. I. P. II. p. 141.*. 81— Dill. Muse. t. 40. 

 /. 48. 



In woods, and borders of bogs and marshes. Fr. Nov. — Mostly in 

 subalpine countries. — The segments of the inner peristome being cleft 

 at the base, Weber and Mohr have considered this difference sufficient to 

 constitute a new Genus, Climacium. "The columella is protruded, 

 and reaches the top of the lid, which, when the capsules are ripe, and 

 during a dry state of the atmosphere, it raises up, turning in a spiral 

 manner; and thus perhaps, permitting the discharge of the seeds. If, 

 in this state, moisture be applied to the mouth of the capsule, the lid on 

 the top of the columella will descend, as this last performs a spiral volu- 

 tiDn, and the capsule is completely closed again." Muse. Brit. ed. 2. 

 p. 1G9. Mr. Wilson remarks on this, " the columella does not appear to 



