SUPPLEMENT.] 254 



Cinclidotus riparius ARNOTT Mem. soc. d'hist, nat. Paris ii, 271 (1825). DE NOT. Syllab. 



259 (1838), Epilogo 494 (1869). BR. SCH. Bry. eur. fasc. 16, p. 10, t. 2 (1842). 



RABENH. D. kr. fl. ii, S. 3, 242 (1848). SCHIMP. Synops. 194 (1860), 2 ed. 235. MILDE 



Bry. files. 140(1869). HUSN. Mouss. n.-ouest 88 (1873), Muse. gall. 119, t. 34 (1886). 



JURAT/. Laubm. oest.-ung. 146 (1882). BOULAY Muse. Fr. 401 (1884). LIMPR. in 



RABENH. D. kr. fl. Laubm. i, 699 (1888). 

 Guembelia riparia C. MUELL. Synops. ii, 651 (1851). 



Dioicous ; in loose soft tufts, i 3 in. high, dark green at apex, 

 black at base, often with a metallic gloss. Leaves erecto-patent, when 

 dry slightly incurved and twisted or incumbent, from a narrower base 

 longish lingulate, obtuse with a short apiculus, scarcely keeled, nerve 

 lost in the point or excurrent as the blunt apiculus and confluent with 

 the thickened limb which consists of five rows of cells in 2 5 layers, 

 the other cells smooth, rather small, dense and roundish. Seta about 

 length of capsule, thick, orange ; caps, exserted, longish oval, erect, 

 somewhat curved, dark brown ; calyptra conico-dimidiate, brownish, 

 reaching middle of caps., lid conic, acuminate, incurved ; peristome 

 dark purple, the teeth irregular, in 2 4 smooth filiform legs, united at 

 base by transverse bars. Male plant more slender and fasciculate. 

 HAB. On stones in streams, very rare and sterile. Fr. 7 8. 



River Fergus at Ennis, Co. Clare, Ireland (Stewart, July, 1884) ! ! In the Teme near 

 Ludlow, Salop (Wayman 1890) ! ! Both sterile. 



So closely does this moss resemble Barbula mucronata that it was long 

 united with it, the Barbula being regarded as a terrestrial variety. In the 

 barren state B. mucronata, may be known by the leaves having the upper cells 

 papillose, and the basal ones more or less transparent, and the margin 

 revolute and of 2 layers of cells ; in fruit the long red seta immediately 

 distinguishes it. 



BRYUM ALPINUM. 



Var. y. viride Husnot. 



Tufts pale green, the leaves shorter, acute, with a few small teeth at 

 apex, nerve yellowish, slightly excurrent. 



SYN. Bryuiii alpinum Var. viride HUSN. Muse. gall. 247. 



HAB. Banks of the Rattle brook, Dartmoor (Holmes] ! ! 



BRYUM CAPILLARE. 



Var. r], elegans Nees. 



Tufts dense and soft, dull green above, ferruginous at base. Leaves 

 dense, julaceously imbricated, very concave and spoon-shaped, broadly 



