40 MUSCI-ACROCARPI-PERISTOMI. [Dicranum. 



SuppL v. 1. p. 194. t. 46. Drum. Muse. Scot. v. 1. n. 35. 

 Muse. Brit. ed. 2.p.97.t. 17. — Oncophorus, Brid. 



Alpine rocks. Fr. July. — Similar in many respects to the preced- 

 ing; but generally larger, sometimes 4 or 5 inches long, with a longer 

 capsule. There is, too, a perichcetium whose leaves are convolute, as in 

 1). scoparium. 



** Capsule without a struma. 



15. D.flavescens, Sm. (yellowish Fork-Moss); stems branched, 

 leaves long lanceolate serrulate pointing in all directions crisped 

 when dry, capsule oblong erect, lid rostrate. E. Bot. t. 226-3. 

 Fl. Brit. p. 1224. Drum. Muse. Scot. v. 2. n. 40. Muse. Brit, 

 ed. 2. p. 98. t. 17. — D. gracilescens, Web. et Mohr — Schwaegr. 

 Suppl. v. 1. p. 180. t. 46 Bryum flavescens, Dicks. 



On wet sand, under the rocky batiks of rivers. Fr. Aug. 



16. D. squarrosum, Schrad. {(hooping -leaved Fork-Moss); 

 stems somewhat branched, leaves from a broad sheathing base 

 lanceolate obtuse recurved and patent directed to every side 

 crisped when dry, capsule ovate subcernuous, lid rostrate. 

 Schrad. Joum. 1802. Turn. Muse. Hib.p. 69. FL Brit. p. 1225. 

 Schwaegr. Suppl. v. 1. p. 182. t. 47. E. Bot. t. 2004. Hobs. 

 Brit. Mosses, v. 1. n. 39. Drum. Muse. Scot. v. 1. ft. 41. Muse. 



Brit. ed. 2. p. 98. t. 17 Bryum palustre, Dicks. — Oncophorus, 



Brid.— Dill. Muse. t. 46. /. 24. 



Wet spongy plains, in rocky alpine situations ; bearing fruit (July) 

 rarely, and usually in sandy deposits by the sides of streams ; as in the 

 Dublin mountains, Dr. Taylor; and Castle Kelly Glen, Ireland, Wils. s 

 in the Isle of Skye, &c. Fr. August.— Some authors arrange this with 

 the strumiferous Dicrana (Oncophorus, Brid.); but to me die struma is so 

 obscure that I think the plant ranks more naturally in the present 

 group. Mr. Wilson, too, observes that there is no real struma, only 

 the appearance of one, from the shrinking of the capsule, when dry, be- 

 low the middle. 



17. D. pellucidum, Sw. (pellucid Fork-Moss); stems branched, 

 leaves lanceolate their margins slightly waved serrated rather 

 obtuse pointing in all directions, capsule ovate subcernuous, lid 

 rostrate. Sw. Muse. Suec. p. 35. Turn. Muse. Hib. p. 68. 

 Fl. Brit. p. 1223. E. Bot. t. 1346. Schwaegr. Suppl. v. 1. 

 p. 181. t. 48. Hobs. Br. Mosses, v. 1. n. 40. Drum. Muse. Scot, 

 v. 1. 7i. 42. Muse. Brit. ed. 2. p. 98. t. 17. — Bryum pellucidum, 

 Linn.— Dill. Muse. t. 46. /. 23. 



Sides of streams and rivers. Fr. Nov.— The more ovate, shorter, 

 somewhat truncate and decidedly inclined capsules, furnish the principal 

 distinction between this plant and D.Jlavescens. 



18. D. spurium, Hedw. (spurious Fork-Moss); stems elon- 

 gated, leaves ovate concave erecto-patent directed to every side 

 the upper ones lanceolate serrulate, capsule oblong curved, lid 

 rostrate. Hedw. St. Cr. v. 2. t. 20. Fl. Brit. p. 1222. Schwaegr. 

 Suppl. v. 1. p. 179. Muse. Brit. ed. 2. p. 99. t. 17. 



