68 MUSCl-PLEUROCAUPI-GYMNOSTOMI. [Hedwigia. 



late acuminated serrated striated, seta very short arcuate at 

 length lateral, capsule not furrowed. Brid. Muse. v. 4. p. 139. 

 Turn. Muse. Hib. p. 109. E. Bot. t. 1237. Schwaegr. Suppl. 

 v. 1. P. II. p. 61. t. 62. Muse. Brit. ed. 2. p. 148. t. 23.— 

 Mnium arcuatum, Dicks. Cr. Fasc. 3. p. 2. t. 7. /. 3. — Hyp- 

 man chrysocomum, Dicks. Cr. Fasc. 2. p. 12. 



Wet banks and among rocks in alpine districts, rare in fructification. 

 Fr. Winter. — This extremely beautiful moss, so frequent with us, seems 

 to be wholly unknown upon the continent. It is at once distinguishable by 

 its perfectly globose, large and smooth (at length furrowed) capsules, by 

 the flexible stems and rigid leaves which never become twisted or curled 

 in drying. 



30. Buxbaumia. Linn. Buxbaumia. 



Capsule oblique, gibbous. Peristome double : the outer of 

 numerous filiform, erect, jointless teeth ; the inner a plaited mem- 

 branous cone. Calyptra mitriform, minute. (Muse. Brit. t. 3.) 

 — Named in honour of J. C. Buxbaum, a German botanist and 

 author of a catalogue of plants of the environs of Halle, who first 

 detected this curious plant in Russia. 



1. B. aphylla, Linn, {leafless Buxbaumia). Linn. Sp. PL 

 p. 1570. Fl. Brit. p. 1148. E. Bot. t. 1596. Hook, in Fl. 

 Lond. cum Ic. Schwaegr. Suppl. v. 1 . P. II. p. 63. Muse. 

 Brit. ed. 2. p. 143. t. 22.— B. viridis, Mong. et Nestl. n. 724.— 

 B. indusiata, Brid. Bryol. Univ. v. I. p. 331. Suppl. p. 2. 

 Dill. Muse. t. 68./. 5. 



On the ground, generally in woods, very rare: first discovered at 

 Sprowston near Norwich, in a fir plantation. Near Rossyln, Mr. E. 

 Maughan. Wood near Aberdeen, Mr. Jackson. Selkirkshire, near the 

 borders of Peebleshire, Mr. J- Stewart. Georgetown hill, one of the 

 Lomonds, Fifeshire, 1,100 feet above the sea, a very exposed spot, 

 Mr. Arnott. Fr. March. — The stem, if it may be so called, is reduced 

 to a little conical bulb, clothed with minute scales, which Mr. R. Brown 

 has ascertained to be leaves; from this arises a red tuberculated seta, 

 about an inch high. Apophysis small, cylindrical. Capsule large, ovate, 

 oblique, nearly flat above, convex below, gibbous at the base ; at the 

 mouth is a rim or border, which is broken or cleft irregularly. Lid small, 

 conical. 



Sect. II. Seta or fruitstalk lateral. Pleurocarpi. 1 I 



Subsect. I. Mouth of the capsule naked. Gymnostomi. 



31. Hedw'igia. Hook, (in Humb. Nov. Gen.) Hedwigia. 



Seta lateral. Mouth of the capsule naked. Calyptra dimi- 

 diate Named in honour of the prince of Muscologists, J. 



G. Hedwig. 



1. H. cestiva, (Summer Hedwigia); stems elongated densely 

 tufted, leaves lanceolate twisted when dry, capsule oval smooth, 



1 From ?rA6v§«, the side, and ku^ov, fruit. 



