DicranacEjE.] 137 [Dicranoweissia. 



point denticulate, hyaline, basal cells quadrate, hyaline, upper 

 rhomboidal, flexuose. (T. XIX, D.) 



Syn. — Campylopus brevipilus Br. Sch. Bry. eur. fasc. 41, p. 7, t. 4 {1847), et Suppl. fasc. i — 2, 

 t. 2, f. I — 2(1864). WiLS. Bry. br. gi, t. 40 (1855). Jens. Bry. dan. 95 (1856). Schimp. 

 Syn. 100 (i860), 2 ed. 106 (1876). Berk. Handb. br. m. 274 (1863). De Not. Epil. bri. 

 ital. 647 (i86g). Milde Bry. siles. 78 (1869). Hobk. Syn. br. m. 50 (1873). HusN. 

 Mouss. nord-ouest 58 (1873). 



Dicranwn brevipilum C. Muell. Syn. i. 412 (1849). 



Camp, decipiens et Molkenboeri Van der Sande Lac. 



Dioicous ; in dense tufts cohering only at base, glossy yellow-green 



above, fuscescent below; stems slender, fragile, i — 3 in. high, with 



scarcely any radicles, fasciculate-leaved. Leaves lanceolate below, 



becoming lanceolate-subulate above, and forming a coma, tipped with a 



short denticulate hyaline point, the margin recurved above the middle ; 



nerve J width of base, in section of 3 strata of narrow cells, the central 



larger and hyaline, back of apex roughish ; auricles generally slightly 



developed, basal cells rectangular, hyaline or partly fuscous, upper 



narrow rhomboidal, flexuose, marginal very narrow. Bracts of female 



infl. broad, sheathing, the margin subrevolute, nerve narrow. 



Hab. — Moist heaths; not rare. 



Prestwick Carr, Northumb. {Thornhill 1813) ! Clonmel and Killarney (Carrington i860) 

 Skipwith common, York and Oakmere {Wilson 1863) ! ! Glengariff and Arran {Hunt 

 1864) ! ! Trungle moor, Penzance (Curnow 1865) ! ! Pilmoor {Baker 1867). Trowls- 

 worthy bog, Devon {Holmes). Bloxworth, Dorset (Rev. H. Wood). Pressridge warren, 

 Sussex and Matley, New Forest {Davics) ! ! Howth and Kylemore (D. Orr). Bressay, 

 Shetland {McKinlay 1864). North Uist {Shaw i856) ! Glen Prosen {Fergusson). 

 Groudale, I. of Man {Holt 1881) ! ! 



This species differs both in habit and areolation from all the others, the 

 upper cells having a distinct sigmoid curve, and the rough back of the leaf 

 near the apex must not be overlooked. The hoary point to the leaf is 

 very variable and sometimes is reduced to 2 — 3 cells or may be quite 

 wanting. 



12. DICRANOWEISSIA Lindb. 



(Oefvers. K. vet. akad. foerh. 1864, p. 230.) 

 Plants tufted, fastigiate ; leaves lanceolate, curled when dry, 

 smooth, with distinct basal angular cells. Perichastium distinct, 

 sheathing; capsule erect, smooth, calyptra cucullate, teeth of per. 

 erect, lanceolate, with lo or 12 striate articulations, trabeculate internally, 

 cleft at apex or undivided. Der. — A compound of the two genera. 



This is wisely separated from the old genus Weissia, as it is clear its 

 affinities are much closer to Dicranum, of which it may perhaps be regarded 

 as a section. 



Clavis to the Species. 

 Capsule elongate-oval, annulate ; leaves lanceolate, margins reflexed. cirrata. 



Capsule ovate, exannulate ; leaves lanceolate-subulate, margins plane. crispula. 



