HypNACE^.j 52 [Amblystegium. 



Hypnum erectum aut fluHans aquaticum, foliis oblongh perangustis aciMs Dill, Cat. Giss. 

 219 (1718), in Ray Synops. 3 ed, 82 (1724). Hist, muse. 299, t, 38, f, 33 (1741), et Herb. 



Hypnum aduncnm (non L.) Hedw. Muse, frond, iv, 62, t. 24 (1797), et Herbar. fide 

 Schimper. Schimp. Bry. eur. Suppl. fasc. 3 — 4, t. i (1866), BouL. Muse. Fr, 59 

 (1884). Hobk. Synops. 2 ed. 216 (1884), 



Hypnum riparium p.p. C. Muell. Synop. ii, 321 (185 1). 



Amblystegium Kneiffii Schimp. Bry. eur. fase. 55 — 56, p. 17, t, 11 (1853). De Not, 

 Cronaca Briol. Ital. P. II, 24 (1867), Epilogo 145 (1869), 



Hypnum Kneiffii Schimp. Coroll. 135. Wils. Bry. brit. 390 (1855). Schimp, Synops, 

 605 (i860). Berk. Handb. br. m, 116 (1863), Milde Bry, siles, 351 (1869). HoBK. 

 Synops. 167 (1873). 



Hypnum aduncum Var. Kneiffii Schimp. Suppl. I.e., Sjmops. 2 ed. 727 (1876). Lesq. 

 James Moss. N, Amer, 380 (1884). Renauld in Husn, Muse, gall, 370 (1894], Dix, 

 James. Stud. Handb, 458 (i8g6), 



Dioicous; in soft yellowish-green tufts. Stems slender, erect or 

 ascending, irregularly pinnate. Leaves rather distant, patulous and 

 subsecund, more or less falcate at apex, from a broadly ovate base, 

 lanceolate acuminate, not sulcate, excavate and decurrent at basal 

 angles, nerved to middle ; cells at base lax, hexagono-rectangular, those 

 at angles dilated, hyaline, the upper narrow, hexagono-rhomboid ; nerve 

 ^ — f length of leaf. Perich. bracts patulous, small and oval externally, 

 the inner large, erect, long and acuminate, strongly plicate, with a long 

 thin nerve nearly to apex. Capsule on a long flexuose seta, from an 

 erect neck, inclined, oblong, arcuate, pale ferruginous, lid conic, 

 annulus broad, peristome as in A.fluitans. 



Hab. — Marshes and pools, frequent. Fr. 6 — 7. 



Var. j8. graeilescens Schimp. 



In soft yellowish or lively green tufts. Stem slender erect, sparingly 

 divided, pinnate. Leaves small, patenti-secund, falcate, from a subcordate 

 ovate base, narrowly lanceolate, suddenly narrowed into a long flexuose 

 acumen, nerved beyond middle; basal ceUs rather lax, hexagono-rectangular. 



Syn. — Hypnum aduncum p, graeilescens Bry. eur. fasc. 57 — 61, p, 37, t. 241. Schimp. 

 Synops. 606, 2 ed. 728. 



Hab. — In subalpine bogs, rare. 



Var. y. tenue Schimp. 



In loose tufts, dull yellow-green above, pale brown below ; stems 

 slender, more or less pinnate with short branches. Leaves distant, very 

 small, broad at base, with large hyaline auricles for | the width of each 

 wing, suddenly contracted into a short falcato-circinate incurved acute 

 acumen ; nerve reaching I — \ the length ; cells shorter. 



Syn. — Hypnum aduncnm S, Um(( Schimp, Bry. eur. 1. c. et Synops, Renauld in Husn. Muse, 

 gall. 369. 



