Neckera.] BRYACE^. 281 



105. NECKERA, Iledw. (PL 5.) 

 Plants long, widely cespitose. Stems radiculose at base, 

 erect or pendent; branches distichous, close or distant, often 

 flagelliform. Leaves flat, generally undulate, glossy, pellucid ; 

 areolation minute, rhomboidal, oblong in the upper part, 

 linear in the middle, quadrate on the borders. Capsule naked 

 or slightly hairy. Peristome double ; outer teeth long, linear- 

 lanceolate and subulate, closely articulate, thin; inner mem- 

 brane divided into filiform segments, subcarinate at base ; 

 cilia and annulus none. 



* Ccqjsule immersed. 



1. N. disticha, Hedw. Syncecious: plants pale green, 

 soft ; stems creeping, with long decumbent flat irregularly 

 pinnate divisions : stem-leaves loosely imbricate, auriculate and 

 unsymmetrical at base, broadly Ungulate, rounded at the apex 

 and slightly concave ; borders erect, entire or slightly crenulate; 

 costa slender, often forking ; cells of the areolation round, the 

 basilar narrow, linear, pale; outer perichsetial leaves small, 

 reflexed, squarrulose, the upper sheathing, ovate, abruptly acu- 

 minate: calyptra smooth: capsule subemergent, urceolate or 

 oblong-cylindrical, pale brown and glossy when old ; lid conical- 

 subulate, oblique ; teeth narrowly lanceolate, subulate, rugulose, 

 pale ; segments as long, not carinate. — Muse. Frond, iii. 58, 

 t. 22 ; Muell. Syn. ii. 46. Pilotrichum distic/mm, Beauv. Prodr. 

 83. Dcdtonia disticha^ Arnott, Disp. 54. 



Hab. On trees, Indian River, Florida {J. Bonnell Smith, Austin). 



2. N. undulata, Hedw. Syncecious : secondary stems 

 slender, decumbent, mostly simple, yellowish green: leaves 

 distichous, compressed, divaricate, clasping the stem on one 

 side, oblong, Ungulate, very obtuse or truncate at the apex, not 

 concave, transversely undulate, serrulate on the borders ; costa 

 narrow, ascending; cells elongated at base, oblong in the 

 middle, rounded at the apex; outer perichgetial leaves ovate, 

 abruptly acuminate, reflexed, the upper narrowly long linear- 

 subulate, surpassing the orifice of the capsule, ecostate or nar- 

 rowly short-costate, subserrulate : calyptra small, covering the 

 lid only, generally split on one side, covered with few hairs : 

 capsule sessile, small, cylindrical-oblong; lid conical, short- 



