BARNES NORTH AMERICAN MOSSES, 247 



II. Leaves secund. 

 A. Costa single, reaching to the middle or heyond. (B on p. 248.) 



I, Leaves transversely rugose and longitudinally 



plicate H. aduncum gracilescens, 381. 



2. Leaves not rugose, often plicate. 



* Paraphyllia abundant {rarely few). 



Leaves plicate H. commutatiim, 387. 



Leaves not plicate. 



Smooth H. filicininn/ 386. 



Very papillose H. decipiens, 561. 



* * Parajihyllia none.^ 



■J— Annulus none. 



Leaves quite entire, short acuminate . . . H. palustre, 398. 



Leaves denticulate, subulate acuminate . . . H. fluitans,' 383. 



+- -1— Anmdus present, often large. 



Leaves acute or bluntish H. ochraceum, 401. 



Leaves subulate by the long excurrent costa . H. capillifoliuin, 551. 

 Leaves gradually long acuminate, costa often entering 

 point but not long excurrent. 

 Broad (1-2 mm.), crumpled and plicate when dry H.lycopodioides,*385. 

 Narrower (0.5-1 mm.), not crumpled when dry. 

 Auricles none or indistinct. 



Leaves usually plicate and denticulate. 



Capsule oblique, incurved, subcylindric H. uncinatura, 382. 



Capsule symmetric, erect, cylin- 



dric , , . . H. uiicinatum syiumetriciim, 552. 

 Leaves entire. 

 Plicate, plants pale green or shining yellow H. yernicosum, 385, 

 Smooth, plants brown or purple or blackish H. revolvens, 384. 



1 See Appendix, no. 560. 



^ H. conflatum C. M. & Kindb., Appendix, no. 558, belonging to this division, is not 

 sufficiently described to enable me to determine its position. 



s Including H. exannulatum Guemb., sec. Kenauld in Husnot's Muscol. Gall. 379. See 

 also Appendix, nos. 553-557. 



* Including H. Wilsoni Sch. (H. Sendtneri Wilsoni Sch.) as a sub-species, sec. Ren- 

 auld, ibid. 375. 



