HYPM.I. 119 



subpinnate; stem-leaves remote, mostly spreading-, except 

 above; branch -leaves falcate; all more or less lanceolate, nar- 

 rowly acuminate, nearly entire, often twisted ; nerve reaching 

 almost to the tip ; cells narrow, dilated below ; fruitstalk 2 

 inches or more long, even, pale red ; sporangium oblong, 

 curved, cernuous ; lid conical, acute. 



Varying very much according to the situation in which it 

 grows. The fruit is sometimes very abundant. Nearly allied 

 to H. riparium, and distinguished principally by its narrow, 

 more tapering, falcate leaves, and longer nerve. 



66. H. revolvens, Swartz ; monoicous; stem suberect, 

 irregularly divided ; branches subpinnate ; branchlets distant ; 

 leaves crowded, circinato-secund, ovato-lanceolate, more or 

 less acuminate, concave, slightly toothed ; nerve reaching 

 above halfway ; perichsetial leaves striated ; sporangium ob- 

 long, cernuous ; lid conical, apiculate. Hook, fy Wils. t. 

 Iviii. ; Eng. Bot. t. 2073. ; (Plate 10, fig. 4) ; Moug. $ Nest. n. 

 1319. 



In bogs and marshes, chiefly in mountainous districts. Bear- 

 ing fruit in spring. 



Forming soft purplish tufts. Stem flaccid, erect or procum- 

 bent ; branches more or less pinnate ; branchlets curved at 

 the tip ; leaves densely crowded, falcate, secund, concave, 

 shining, ovate at the base, attenuated upwards, entire or ob- 

 scurely serrate ; nerve reaching more than halfway up, some- 

 times in contiguous leaves, double; cells narrow, not enlarged 

 below; perichsetial leaves striated ; fruitstalk 1 inch high, even ; 

 sporangium oblong, curved, cernuous ; lid conical, acute. 



Leaves much broader at the base, more crowded, falcate, 

 and with a shorter nerve. 



** Leaves decidedly serrate ; nerve reaching above halfway. 



67. H. uncinatum, Hedw. ; monoicous ; stem suberect or 



