198 BRYACE^. [Physcomitrium. 



and shorter mamillate lid. A marked variety from Florida may be a dis- 

 tinct species. It has longer narrower leaves, very flexuous and nearly 

 twisted, deeply dentate, and with stronger percurrent costa. The long 

 slender pedicellate capsule, with a short obtuse lid, is generally gibbous 

 on one side, widely enlarged at the orifice and cupuliform when empty. 

 Another variety, Gymnostomum tortlpes, Brid., has long flexuons slender 

 stems, with distant narrowly lanceolate acuminate leaves dentate at the 

 apex, the pyriform capsule distinctly inflated at the coUum and narrowed 

 at the orifice. 



4. P. Hookeri, Hampe. Much like small forms of P. pyri- 

 Jbi-me, from which it differs in the broadly oval gradually acu- 

 minate leaves, with borders entire or very slightly serrulate 

 below the apex, by the protrusion of the marginal cells, the 

 quadrate smaller upper cells, and the short thick pedicel of the 

 oval obconical capsule, which is slightly constricted under the 

 broad orifice, rugose and gradually passing into a thick unde- 

 fined collum. The annulus is thick, broad and persistent, 

 adhering to the orifice or falling j^iecemeal. — Icon. Muse, under 

 t. 30. Gyinnostoinimi turhinatum^ Michx. Fl. Bor.-Am. ii. 286. 

 G. latifoliuni^ Drumm. Muse. Amer. n. 16 ; Schwaegr. Suppl. 

 iv., t. 304, B. P. latifolium^ Lindb. Ofvers. Akad. xxi. 595 

 (1864). P. /dans, Lindb. Manip. Muse. i. 51 (1870); SulUv. 

 Icon. Muse. Suppl. 26, t. 16. 



IIab. Wet meadows and marshy fields, in the Western States, often 

 mixed with P. pyriforme. 



5. P. acuminatuni, Bruch & S chimp. Plants shorter 

 than in P. pyriforme, generally stouter and less divided : the 

 leaves ovatedanceolate, acute, concave, very entire or obscurely 

 serrate at the apex, yellowish-margined at the base ; costa per- 

 current or excurrent : calyptra large, sometimes persistent after 

 maturity of the capsule : capsule spherical with inflated col- 

 lum, constricted under the orifice when empty ; lid short, con- 

 vex, apiculate : spores large. — Bryol. Eur. t, 300. Gymnosto- 

 mum acuminatum, Schleich. Cat. PL Ilelv. ed. 4, 40. 



Hab. Texas ( Wright); Illinois {E. Hall). 



6. P. turbinatum, Muell. ined. Plants cespitose, much 

 divided, straw-color : leaves open and flexuous, oblong and nar- 

 rowly lanceolate, distinctly acuminate by the excurrent costa, 

 entire at the apex ; areolation smaller and more compact : male 

 plants terminal: capsule long-pedicelled, broadly ovate-turbi- 

 nate ; lid small, rostrate. 



Hab. Texas {Boll). 



