HvPNACEiE.] 62 [Amblysteguim. 



teeth solid, yellow, cilia nodulose. Male infl. turgid, bracts numerous, 

 rather squarrose, ovate. 



Hab. — On rocks in streams in subalpine districts. Fr. 6. 



Near Aber, N. Wales {Wilson 1858) ! ! Dennant, Conway {Wilson). Barra waterfall, 

 Keswick. Kentmere, Westmoreland (y. M. Barnes i86g) ! ! Lodore, Cumberland 

 {Binstead i88g) ! Tore cascade, Killarney {Wilson). 



Var. /3. Mackayi Schimp. 



More robust, in denser rufous-brown tufts, with somewhat obtuse 

 branches. Leaves subsecund, or erecto-patent, subimbricated, broadly 

 oblong, less acuminate. Perichaetium shorter, the inner bracts shorter, 

 patent, less sulcate, capsule shorter. 



Syn. — Hyfnum eugyrium Var. fi. Mackayi Schimp. Synops. 2 ed. 782. Hobk. Synops. 2 ed. 228. 



Hab. — On boulders in streams and about waterfalls, often intermixed with 

 the type and more frequent here. 



Tore waterfall (Mackay) ! ! Kentmere (J. M. Barnes i86g) ! ! Stream above the fall, 

 Aber, N. Wales (Wilson 1858) ! ! Lyndale, Devon {Nowell 1864) ! ! Rumbling bridge, 

 Dunfermline (Dr. Wood). Cautley waterfall, Dent (Nowell). Lodore (Binstead 1888) ! 

 Glengariff, Cork (Binstead i8g6) ! 



Very variable in the form of leaf, but may be mistaken for a form of 

 palustre. The nerves are figured much too strongly on the plate, and generally 

 none are visible. 



Sect. 6. CALLIERGON ,StiUiv. Stems erect, ascending, with few 

 divisions or subpinnate, terete, turgid. Leaves more or less closely 

 imbricated, ovate and oblong obtuse, deeply concave, not striate glossy, cells 

 minute, linear, those at basal angles often large and hyaline. 



Clavis to the Species. 



Stems more or less pinnate-branehed, leaves scarcely imbricated. 

 Stem leaves broad cordate obtuse, green. 



Branches numerous, leaves with very long narrow cells 



and sharply defined auricles. gigayitetim. 



few, cells lax, auricles indistinct. cordifolinm. 



oblong apieulate, purple. sarmentosiim . 



nearly simple, leaves imbricated when dry. 



Leavei roundish obtuse, brownish, auricles indistinct. trifarium. 

 oblong yellowish, auricles distinct. stramineum . 



38. AMBLYSTEGIUM GIGANTEUM {Schimp.) De Not. 



Dioicous ; robust tall closely pinnate, deep lurid green. Cauline 

 leaves erecto-patent, cordate-ovate, obtuse, with large decurrent 

 auricles, formed of inflated quadrate cells sharply defined from the long 



