6 MUSCI-ACROCARPI-GYMNOSTOMI. [Gymnostomum. 



Bogs, not uncommon, generally wholly immersed in the water ; rare 

 in fruit. Fr. Spring. — Dr. Greville has found, near Edinburgh, a state of 

 this plant four feet long, with leaves 3-4ths of an inch in length, but 

 always barren. 



4. (Edipodium. Schwaegr. Club-stalked Moss. 



Seta terminal, elongated, thick, fleshy. Mouth of the capsule 

 without peristome, but closely shut by an horizontal membrane. 

 Calyptra dimidiato-mitriform. — Named from o3o$, a swelling, and 

 irovg, afoot ; the footstalk being remarkably thickened upwards. 



1. CE. Griffithidnum, Schwaegr. (Griffithian club-stalked 

 Moss). Schwaegr. Suppl. 2. p. 15. t. 150. Brid. JBryol. Univ. 

 v. 2. p. 83. — Gymnostomum Griffithianum, Fl. Brit. p. 1162. 

 E. Bot. t. 1938. Drum. Muse. Scot. v. 1. n. 9. Muse. Brit. ed. 

 2. p. 20. t. 7. — Bryum Griffithianum, Dicks. Or. Fasc. 4. t. 10. 

 /. 10. — Splachnum Frcelichianum, With, et Hull. (Sm.) 



Crevices of rocks upon the more elevated mountains. Snowdon, 

 Mr. Griffith, Mr. W. Wilson. Ingleborough, Yorkshire. Rev. J. Dalton 

 and W. J. H. Clova mountains, Air. Don and Mr. Drummond. 

 Ben-Nevis and Ben-Cruachan, Rev. Colin Smith. Ben-Ledi, Mr. J. D. 

 Hooker and Mr. G. Lyon. Fr. Aug. — Stems scarcely any. Leaves large, 

 roundish-obovate, strongly reticulated, succulent, the nerve disappearing 

 below the summit. Seta very thick and fleshy, especially upwards, 

 where it gradually enlarges into the oval nearly erect capsule. Lid he- 

 misphaerical. Calyptra diaphanous in its lower half. Gemma are found 

 within the leaves, " obovate, compressed, with lenticular edges, some- 

 times intermixed with the pistils, sometimes with the anthers and jointed 

 filaments ; when fully formed they have lenticular edges and are sup- 

 ported on long jointed filiform stalks. Before they are detached 

 they exhibit lateral innovations from their edges. The membrane which 

 closes the mouth of the capsule is continued, so as to line the lid, which 

 lining is detached along with the lid, adhering by means of connecting 

 threads at intervals and leaving a space between it and the fleshy sub- 

 stance of the lid, which is almost pellucid. Columella only \ as long as 

 the capsule. Seeds in fours." W. Wilson. 



So remarkable a plant as this, with a splachnoid habit, does not rank 

 well with the Gymnostoma. 1 have therefore followed Schwaegrichen, 

 in separating it, making the essential difference to depend on the pecu- 

 liar nature of the fruitstalk. 



5. Gymnostomum. Hedw. Beardless-Moss. 



Seta terminal, slender, rigid. Mouth of the capsule naked, or 

 at most, in an early stage, closed with a more or less complete, 

 horizontal membrane. Calyptra dimidiate. — Leaves inserted on 

 all sides of the stem. (Muse. Brit. t. 1.) — Name ; yvpvog, 

 naked and ffro/xx, the mouth : from the absence of a peristome. 



* Stems more or less elongated, branched. 



1. G. ccespititium, Web. et Mohr, (minute tufted beardless- 

 Moss) ; leaves lanceolato-subulate canaliculate obscurely nerved 

 very straight even when dry, those of the perichsetium much 

 longer than the turbinate quite furrowless capsule. Web. et Mohr, 



