60 APLOPERISTOMI. [Polytrichum. 



the summit of the keels, capsule nearly erect cylindrical with- 

 out an apophysis. (TAB. XI.) 

 a. major ; fruitstalks two inches long ; stems usually simple. 



Polytrichum aloides. Hedw. St. Cr. v. 1. t. 14. Menzies in Linn. 



Trans Turn. Muse. Hib. p. 88. Smith, Fl Brit. p. 1380. Engl Sot. t. 



1619. Schwaegr. Suppl. v. 1. p. 322. Hobson, Brit. Mosses, v. 1. n. 

 18. Drummond, Muse. Scot. v. 2. n. 19. Hook. Fl. Scot. P. II. p. 

 126. Arn. Disp. Muse. p. 71. Moug. et Nestl p. 129. Funck, Deutschl 

 Moose, t. 56. / 15. 



P. defluens. Brid. Meth. p. 200. 



P. rubellum. Menzies in Linn. Trans, v. 4. t. 7. f. 3. Turn. Muse. 

 Hib. p. 87. Smith, Fl. Brit. p. 1381. Engl. Bot. t. 1939. 



Mnium polytrichoides. /3. Linn. Sp. PI. p. 1577 Dill. Muse. p. 55. 



/7; 



ft. Dicksoni ; fruitstalks very short ; stems branched with innovations. 



P. Dicksoni. Turn. Muse. Hib. p. 90. t. 10. /. 2. Engl. Bot. t. 

 1605. Brid. Meth. p. 201. 



HAB. Moist banks, not uncommon. 



Stems, for the most part, half an inch high and simple ; in the 

 P. rubellum of Menzies sometimes an inch in length, and pro- 

 ducing here and there innovations which make them appear 

 branched. The var. j3. has the stems always branched with 

 one or more annotinous shoots, each of which generally bearing 

 a fruitstalk not more than half an incli long, gives the plant a 

 very remarkable appearance, which has induced that admirable 

 muscologist, Mr. Turner, to consider it a distinct species. 

 10. P.nanwm; stems short, leaves linear-lanceolate obtuse their 



margins serrated principally at the extremity, as well as the 



summit of the keels, capsule nearly erect subglobose. (TAB. 



XI.) 



Polytrichum nanum. Hedw. St. Cr. v. 1. t. 13. Menzies in Linn. 

 Trans Turn. Muse. Hib. p. 89. Smith, Fl. Brit. p. 1379. Engl. Bot. 

 t. 1625. Schwaegr. Suppl. v. I. p. 324. Hobson, Brit. Mosses, v. 1. n. 

 20. Drummond, Muse. Scot. v. 2. n. 20. Hook. Fl. Scot. P. II. p. 

 126. Arn. Disp. Muse. p. 72. Moug. et Nestl. n. 130. Funck, Deutschl. 

 Moose, t. 56. / 16. 



P. semidiaphanum. Brid. Meth. p. 200. 



P. intermedium. Brid. Meth. p. 200. 



P. subrotundum. Menzies in Linn. Trans. Smith, Fl. Brit. p. 1378. 

 Engl. Bot. t. 1624. 



P. pumilum. Swartz, Muse. Suec. t. 9. f. 19. Hedw. Sp, Muse. t. 

 21 Dill Muse. t. 55. / 6. 



