50 MUSCI-ACROCARPI-PERISTOMI. [Poli/trichum. 



antiacum, Hoppe, and P. pallidisetum, Funck, Deutschl. Moose, 

 t. 56./. 10. 



. Heaths and woods in sandy soils, both in wet and dry situations. 

 Fr. June. — The stems, in all the states of this plant, (and they are very 

 numerous, though I have considered only two worthy of particular 

 notice), are simple or only branched very low down, and among the 

 roots. Far. a. is found from a span to a foot in height, with the 

 leaves very patent, often recurved, long and narrow, their margins 

 scarcely diaphanous. In /3. the stems do not often exceed 3-4 inches; 

 the /eaves are rather less patent than in a., and of a shorter and broader 

 figure, with their margins whitish and diaphanous. In both the leaves 

 are equally decidedly serrated. 



7. P. alpinum, Linn, {alpine Hair- Moss); stems elongated 

 branched in a fasciculated manner, leaves patent subulato-lan- 

 ceolate their margins plane serrated as well as the points of the 

 keels, capsule oblique subovate with a distinct apophysis. 

 Linn. Sp. PL p. 1593. Hedw. Sp, Muse. t. 19. Turn. Muse. 

 Hib. p. 85. Fl. Brit. p. 1377. E. Bot. t. 1905. Schwaegr. 

 Suppl. v. I. p. 317. Hobs. Br. Mosses, v. 1. n. 17. Drum. 

 Muse. Scot. v. 1. n. 16. Muse. Brit. ed. 2. p. 48. t. 11.— P. syl- 

 vaticum, Menz. in Linn. Trans, v. 4. t.7.f. 6. — P. arcticum, Sw. 

 Muse. Suec. t.8.f. 17. 



Frequent upon the earth, in alpine situations ; rare in the low ground, 

 as at Llyn Ogwen, by the Shrewsbury road, N. Wales. Wils. Fr. July. 



8. P. urnigerum ; stems elongated branched, leaves erecto- 

 patent lanceolate acute their margins plane serrated, capsule 

 erect cylindrical destitute of an apophysis. Linn. Sp. PL p. 1573. 

 Hedw. Sp. Muse.]). 100. t. 22. /. 5—7. Turn. Muse. Hib. p. 86. 

 Fl. Brit. p. 1377. E. Bot. t. 1218. Schwaegr. Suppl. v. J. 

 p. 318. Hobs. Br. Mosses, v. \.n. 18. Drum. Muse. Scot. v. I. 

 n. 15. Muse. Brit. ed. 2. p. 49. 



Sandy places, on banks and by the sides of streams, especially in 

 mountainous countries. Rare in the plains, yet abundant on banks at 

 Gillingham, Norfolk; D. Turner, Esq. Fr. Nov.— Leaves singularly 

 glaucous (reddish only through age.) 



9. P. abides, Hedw. (dwarf long-headed Hair-Moss); stems 

 usually short, leaves linear-lanceolate obtuse their margins plane 

 serrated principally at the extremity and at the summit of the 

 keels, capsule nearly erect cylindrical, apophysis none. Hedw. 

 St. Or. v. U t. 14. Turn. Muse. Hib. p. 88. Fl. Brit. p. 1380. 

 E. Bot. t. 1619. Schwaegr. Suppl. v. 1. p. 322. Hobs. Br. 

 Mosses, v. 1. n. 18. Drum. Muse. Scot. v. 2. n. 19. Muse. Brit, 

 ed. 2. p. 49. t. 11. — P. rubellum, Menz. in Linn. Trans, v. 1. 

 t. 7. f. 3. Turn. Muse. Hib. p. 87. Fl. Brit. p. 1381. E. Bot. 

 t. 1389. — Mnium polytrichoides, (3. Linn. Sp. PL p. 1577. — 

 Dill. Muse. t. 55. /. 7. — 18. Dicksoni ; seta very short, stems 

 branched with innovations. P. Dicksoni, Turn. Muse. Hib. p. 90. 

 t. 10. /. 2. E. Bot. t. 1605. 



Sandy moist banks and in shady woods, common. Fr. Dec. — The 

 P. rubellum of Mr. Menzies has the stems elongated, sometimes half an 



