94 MUSCI-PLEUROCARPI-PERISTOMT. [Hypnum. 



Br. Mosses, v. 2. n. 60. Drum. Muse. Scot. v. 2. n. 83. Muse. 

 Brit v. 2. p. 186. t. 24.— Bill. Muse. t. 38./. 33. 



In pools and streams of water; rarely fructifying, except in places that 

 are only occasionally inundated. Fr. Dec. — Stems often a span or more 

 long. Colour varying from pale green to a deep purple in alpine rivulets. 



64. H. aduncum, Linn, (claw-leaved Feather- Moss); leaves 

 falcato-secund lanceolato-subulate concave or almost semicylin- 

 drical entire the nerve disappearing below the summit, capsule 

 oblongo-ovate curved cernuous, lid conical. Muse. Brit. ed. 2. 

 p. 186. t. 26. — x. revolvens ; leaves narrow, very falcate. Linn. 



Sp. PI. p. 1592. Hedw. St. Cr. v. 4. t. 24. Turn. Muse. 

 Bib. p. 189. Fl. Brit. p. 1327. Schwaegr. Suppl. v. 1. P. II. 

 p. 299. Hobs. Br. Mosses, v. 1. n. 93. Drum. Muse. Scot. v. 2. 



n. 81.— H. revolvens, Sw Turn. Muse. Hib. p. 188. E. Bot. 



t. 2073. — Dill. Muse. t. 37. /. 26. — 13. rugomm ; leaves wider, 

 less falcate somewhat rugose. Linn. Mant. p. 131. E. Bot. 

 t. 2250, (not Hedw. nor Schwaegr.) — H. lycopodioides, Schwaegr. 

 Suppl. v. 2. p. 300.— Dill. Muse. t. 37. /. 24. 



Bogs, common. Fr. May. — The leaves are of a peculiarly soft, flaccid 

 and membranaceous texture. 



65. H. uncindtum, Hedw. (sickle-leaved Feather -Moss); leaves 

 falcato-secund lanceolato-subulate serrated striated the nerve 

 disappearing below the point, capsule cylindrical curved cer- 

 nuous, lid conical. Hedw. St. Cr. v. 4. t. 5. Turn. Muse. Hib. 

 p. 190. Fl. Brit. p. 1328. E. Bot. t. 1600. Schwaegr. Suppl. 

 v. I. P. II. p. 304. Hobs. Br. Mosses, v. 1. n. 89. Drum. Muse. 

 Scot. v. 2. n. 82. Muse. Brit. ed. 2. p. 187. t. 26. 



Moist banks and stone walls, abundant in subalpine countries. Fr. 

 June. — The slender stems, which are pinnated, the long and uncinate 

 leaves of a brighter colour, together with their striae and serratures, abun- 

 dantly distinguish this from H. aduncum and all its affinities. 



66. H. rugidosum, Web. et Mohr, (wrinkle-leaved Feather- 

 Moss); leaves secund ovato-lanceolate serrated nearly plane 

 crisped transversely when dry the margins recurved the nerve 

 reaching half-way. Web. et Mohr, Fl. Cr. Germ. p. 366. 

 Muse. Brit. ed. 2. p. 187. t. 26. — H. rugosum, Hedw. Sp. Muse, 

 p. 293, et St. Cr. v. 4. t. 23. /. A. (leaf only). Schwaegr. Suppl. 

 v. 1. P. II. p. 301. 



On the ground, in heathy places, near Thetford, F. K. Eagle, Esq. — 

 Mountainous parts of Scotland, especially in Breadalbane. Fr. un- 

 known. — This lies on the ground in dense tufts of a yellow-brown 

 colour. The transverse undulations are peculiarly striking, even to the 

 naked eye, in which particular, as well as in the broader and shorter, 

 more plane, secund, but not falcate, leaves, it differs from all the varie- 

 ties of H. aduncum. The only species that is very closely allied to this 

 is the H. robustum (Muse. Exot.) of the N. W. Coast of America. 



67. H. commutdtum, Hedw. (curled Fern Feather-Moss); 

 stems pinnated, leaves falcato-secund cordate very much acumi- 

 nate serrated their margins reflexed the nerve disappearing 



