Dicranum.] MUSCI-ACHOCARPI-PERISTOMI. 39 



Sp. Muse. p. 141. t. 33. Schwaegr. Suppl. v. 1. /;. 179. Grev. 

 Scot. Cr. FL f. 116. 3Iusc. Brit. ed. 2. p. 95. Suppl. t. 3. 



Uj)on clayey soil, in an old neglected road in Glen Tilt at the foot of 

 Ben-y-gloe ; Grevitle, Arnott, and Hooker, 1822. Fr. Aug. — This has 

 the mode of growth of D. varium and the sqnarrose foliage of D. squarro- 

 sum; but the whole plant is much smaller, the leaves narrow with re- 

 markably broad sheathing bases, and the capsule has a distinct struma. 



11. D. stiumiferum, Ehrh. (stmmose Fork-Moss); stems 

 elongated, leaves from a broad sheathing base subulate entire 

 their margins plane crisped when dry, pointing in all directions, 

 capsule furrowed oblongo-ovate subcernuous strumose, lid ros- 

 trate. Ehrh, Crypt, n.74. Fl.Brit.pA'298. E. Bot. t.2A\0. Drum. 

 Muse. Scot. v. 2. n. 42. Sc/ncaegr. Suppl. v. I. p. 194. Muse. 

 Brit. ed. 2. p. 96. t. 17. — Fissidens strumifer, Hedw. St. Cr. 

 v. 2. t. 32. — Bryum indinans, Dicks. — Oncojjhorus, Brid. 



Marshy places, in alpine situations. Fr. Autumn. — Allied to 

 D. virens ; but the margins of the leaves are not recurved, and the 

 capsule is shorter and deeply furrowed. 



12. D. pott/cdrpon, Ehrh. (many-headed Fork-Moss); stems 

 elongated branched, leaves patent pointing in all directions lan- 



ceolato-subulate their margins recurved flexuose subsernilate 

 erisped when dry, capsule oblongo-ovate nearly erect furrowed 

 when old, struma inconspicuous, lid rostrate. Ehrh. Crypt, 

 n. 84, (according to Smith). Fl. Brit. p. 1227. E. Bot. t. 2269. 

 Schwaegr. Suppl. v. I. p. 179. Muse. Brit. ed. 2. p. 96. t. 18. — 

 Fissidens polycarpus, Hedw. St. Cr. v. 2. t. 31, (not good.) — 

 Oncophorus, Brid. 



Alpine rocks, rare. Ben High, Aberdeenshire, Mr. G. Don. Fr. Aug. 

 — Were it not for the obscure struma and the narrow recurved margin 

 of the leaves, I should be inclined to reduce this plant to J), strumiferuia : 

 indeed I have seen some specimens so intermediate that I have scarcely 

 known to which I ought to refer them. 



13. D. falcdtum, Hedw. (sickle-leaved Fork-Mot*)} stems 

 nearly simple, leaves long lanceolate-subulate falcato-secnnd 

 nearly entire, capsule ovate subcernuous Btrumose, lid rostrate. 



Hedw. S P . Muse. /.:)•_». f. 1—7. Fl. Brit. r . 1208. E. BoL 

 t. W^'.K Schwaegr. Suppl v. I. p. 190. Hobs. Dr. Mosses, v. 2. 



;/. 33. Drum. Muse. Scot. r. 1. //. 36. Muse. Hi it. ul. 2. />. <>7 . 



/. 17. — Bryum lonyifolium, Dicks. — Oncophorus, Brid. 



Alpine rocks, Fr. June.— Allied to /;. heteromaUunn but it is more 

 rigi I, the leave* more falcate and then- i> an evident struma. Mr. Wil- 



IOD u;h Struck with the BOOtl hue of the c.ili/plru of thfe specie-, on the 



summit of Ben Lawers. Tnis 1 have often observed, and have always 

 attributed it to the effect of the mow which covers the plan! even 

 during a great portion of the summer, in those elevated regions. 



14, l>. Stdrkii, Web. et Mohr, (Starkia* Ftk-M 

 items somewhat branched, leaves lanceolate- subulate falcato- 

 second entire, capsule oblongo-ovate sobered stmmose, lid rot- 

 trate. Web.ti Mohr. II. Cr. Germ. B* BoLt 2-2-2:. Sohwa^or. 



