— 140 — 



round-oval not well-defined, the others linear. Capsule oval- 

 oblong; teeth pale yellow; segments hyaline; lid apiculate; pedicel 

 short. Tufts green. Habit of H. capressiforme (but with small 

 leaves). Differs from H. circinnale in brown or green longer 

 us. irregularly pinnate stem, not horizontally patent branches 

 and not striped leaves. — Trees r. Amer. Can.: Macoun; Wag- 

 horne. 



B. Leaves entire or (sometimes in H. Dieckii) at acumen 

 slightly denticulate; alar cells hyaline somewhat large. Stem 

 not creeping; paraphyUia none. Dioecious r. fruiting. Capsule 

 large. 

 50.H.callichrouni Bridel. 



Leaves long-acuminate subdecurrent faintly striate above; 

 alar cells on a short-triangular space, the others linear. Stem- 

 leaves from broad-ovate base abruptly narrowed; branch-leaves 

 gradually tapering. Capsule cyhndric arcuate; lid short with 

 very short point; pedicel long. Tufts green or yellowish. Bran- 

 ches often plumiform. Habit of H. molluscum. — Humid grassy 

 places princ. in alp region r. Eur. Sweden: E. Adlerz. Nor- 

 way: R. Hartman. Finl.: Brotherus. Engl.: Holt. France: 

 Husnot. Germany: Boulay. Austria: Juratzka. Spetsbergeu: 

 Berggren. Amer. Greenl.: Berggren. 

 ol.H.Dieckii Renauld et Cardot. 



Leaves from subovate base acuminate; cells Huear-lanceolate 

 exc. the alar. Tufts green. Stem irregularly divided. Habit 

 of Calliergon montanum. — Amer. r. U. S.: Roell, com. Cardot. 

 5. Raphidostegioidea. 



A. Leaves denticulate. Stem radiculose subpinnate; branches 

 compressed. 



52.H.Jamesii Sullivant. — Rhynchostegium Sull. ic. m.; Hyp- 

 num Lesquereux et James. 



Leaves entire below, denticulate above, subabruptly tapering 

 to a subulate often tiUform-pointed acumen; alar cells few sub- 

 quadrate not large, the others linear. Stem-leaves with broad- 

 ovate base; branch-leaves ovate-oblong. Perichetial leaves with 

 subulate acumen and sometimes with filiform point, denticulate 

 below it. Capsule suboblong nearly straight; lid rosteUate; pe- 

 dicel short. Tufts green not glossy. Monoecious. Habit of 

 Baphidostegium recm-vans. — Trees r. Amer. Can.: Macoun. 

 53.H.pseudo-recurTans Kindb. — Raphidostegium note on 

 Can. bryol. 1893. 



Difiers from the last: Leaves denticulate aU around, ovate- 



