— 406 — 



and few teeth near the apex. Nerve very strong, vanishing 

 in apex. Seta red, 1,2—1,5 ctm. long. Capsule undeveloped. 

 On stones. 



• Amblystegium atrovirens n. sp. 



Autoicous; tufts flat, brownish green, according to the nar- 

 row, s quarr ose leaves of a somewhat peculiar habit. Stem 

 creeping, rooting with numerous radicles, 0,10 — 0,15 mm. in diameter, 

 brownish, densely and irregular ramulose, branches erect, 5 — 10 mm. long, 

 their base surrounded with few paraphyllia. All leaves squarrose both 

 in moist and dry state, crowded. Stem leaves 0,7— 1 ,0 mm. long 

 and 0,2— 0,3 mm. broad, from an ovate base suddenly attenuated 

 in a very long subulate acumen, toothed in the broad part. 

 Nerve green, 0,02 — 0,03 mm. broad, ending at the middle or nearly to 

 the point. Leaf cells somewhat incrassate, elongato rhomboid, 0,008 mm. 

 broad, at middle of the leaf 3 — 4 times, in the acumen 6 — 8 times as 

 long as broad, basal cells in a single row, yellow, ovate, incras- 

 sate, 0,012 mm. broad, nearly 3 times as long, "the angular 

 few, rhombic and quadratic, 0,010 — 0,012 mm. broad, green 

 or yellow. Branch leaves lanceolate, 0,9 mm. long and 0,15mm. broad, 

 with piliform acumen and thin nerve to the middle. Perichætium 2 mm. 

 long, very radiculose, bracts lanceolate, plicate, green, with long, re- 

 curved or flexuose, faintly toothed acumen; nerve stout, 

 yellow, vanishing in acumen. Seta thin, 2 — 2,5 ctm. long. Capsule 2,5 mm. 

 long and 0,6 mm. thick, arcuate, contracted below the mouth; lid 0,6 mm. 

 long, conical, with red mamilla. Annulus of 2 — 3 rows of cells, 0,035 — 

 0,042 mm. broad. Teeth of peristom dark yellow, 0,55 mm. long and 

 0,09 mm. broad, only connected at base. Endostome pale yellow, papillose. 

 Spores olivegreen to brown green, 0,012—0,016 mm., nearly smooth. 

 Fruit in June. 



On roots or base of tree trunks and damp shady ground in woody 

 districts. 



