Hypnace^.J 87 [Hypnum. 



17. HYPNITM TEESDALEI SmUh. 



Autoicous; in depressed dull-p;reen tufts. Branches short erect, 

 simple. Leaves patent, lanceolate, subserrulate, with bluntish points, 

 nerve flat and thin nearly reaching apex. Seta rough ; capsule 

 cernuous, ovate, without a neck; lid rostrate. (T. CI, B.) 



Syn. — Hypnum intyicatum (non Schree.) Dicks. PI. crypt, fasc. 2, p. 10 excl. syn. (1790), 

 Eng. Bot. t. 202 (1794). 



Hypnum Teesdalei Smith F1. Brit. 1291 (1804). Brid. Bry. univ. ii, 416 (1S27). C. Muell. 

 Synops. ii, 400 (1851) p.p. WiLS. Bryol. Brit. 350 (1855) p.p. Berk. Handb. 8g (1863). 

 HoEK. Synops. 158 (1873). Boulay Muse. Fr. iii (1884). 



Hypnum fachyneuron Tayl. MSS. in Herb. Hooker. 



Eurhynchium Teesdalei Lindb. in Journ. Linn. Soc. Bot. xiii, 66 (1872). Schimp. Synops. 

 2 ed. 676 (1876). HoEK. Synops. 2 ed. 206 (1884). Husn. Muse. gall. 342 (1893). 

 Dix. James. Stud. Handb. 420 (i8g6). 



Rhynchostegiella Teesdalei Limpr. Laubm. iii, 217 (1897). 



Autoicous ; in depressed dull dark green tufts. Plants very small, 

 rigid, irregularly branched. Stem-leaves distant, patent, ovato- 

 lanceolate, subentire, with a thin nerve ; branch-leaves lanceolate, with 

 a blunt point, remotely serrulate in the upper half, nerve flattened and 

 vanishing in the apex. Cells chlorophyllose, spindle-shaped, at base 

 rectangular with a few quadrate at angles. Perichsetial bracts few 

 erect, lanceolate, nerveless, not passing beyond the vaginula ; seta 

 purple erect or flexuose, coarsely verrucose ; capsule slightly cernuous, 

 ovate, brown, without any neck, lid as long as capsule, convex at base, 

 rostrate. Teeth of peristome lanceolate-subulate, yellow, incurved. 

 Male infl. gemmiform, bracts lanceolate, entire, nerveless. 



Hab. — On stones and rocks in small streams, not common. Fr. 3^ — 5, 



Matlock Bath, Derbyshire (Teesdale). Bantry [Miss Hutchins). Belfast (Templeton). 

 Mill Dingle, Beaumaris (Wilson) ! ! Rigg-mill beck, Whitby (Braithwaite) ! ! Sedbergh, 

 Yorks. (Pinder). Thornton gill, Ingleton [Nowell 1865) ! ! Lover's leap, Buxton 

 (Hunt 1867). Dunottar, Banchory (Sim 1870). Sluice at Ashley mill (Hunt) ! 

 Underbarrow mill and Sedgwick, Westmoreland (Stabler 1872) ! Lymm, Cheshire 

 (Holt 1889) ! ! Easington beck and Roxby, Yorks. (R. Barnes 1889) ! ! 



This moss is more aquatic than the other species of this group, growing 

 on ledges of mountain limestones in streams, and hence often damaged by 

 abrasion. The rigidity of the plants and their dark colour are also striking. 

 Limpricht has described the species of this section with his usual clearness 

 and has pointed out an important character in the relation between the length 

 of the vaginula and its enclosing bracts, 



