38 Charles E. Bcsscy 



Order Sphagnales. Large plants with thick leaves composed 

 of two kinds of cells; spore-fruit on a psendopodium. dehiscing 

 by a circular lid ; no peristome. 



Family 7. Sphagnaceae. Bog-mosses of considerable size, 

 whose spongy leaves retain moisture for a long time, hence used 

 for moist packing. Spliagnnm. (Pf. I, 3, 244.) 



Order Bryales. Small to large plants with mostly thin leaves 

 of similar cells ; spore-fruits mostly long-stalked, generally open- 

 ing by a circular lid ; peristome usually present. 



Suborder Acrocarpi. Spore-fruits terminal upon the main 

 axis. 



Family 8. Archidiaceae. Small mosses, with sessile thin- 

 walled, indehiscent spore-fruits. Archidunn. (Pf. I, 3, 288.) 



Family 9. Dicranaceae. Large to very small, mostly turf- 

 forming mosses ; spore capsule with operculum ; peristome single, 

 with 16 teeth, rarely absent. Ditrichnm, Ccratodon, Lencoloma, 

 Dicraniiui. ( Pf. I, 3, 289.) 



Family 8. Leucobryaceae. Medium-sized, spongy mosses with 

 many-ranked, thick leaves ; peristome single, of 16 or 8 teeth. 

 Lciicobryuiii. Lcucophaiics. ( Pf. I, 3. 342.) 



Family 9. Fissidentaceae. Medium sized mosses with distich- 

 ous, winged and equitant leaves; peristome single of 16 mostly 

 divided teeth. Fissidciis. (Pf. I, 3, 351.) 



Family 10. Calymperaceae. Medium or small tropical mosses, 

 growing on trees; with a single peristome of 16 teeth. Syrrho- 

 podoii, Calyinpcrcs. (Pf. I, 3, 363.) 



Family 11. Pottiaceae. Small to medium sized, much branched 

 mosses; leaves hyaline at base; capsule erect, narrowly oval, to 

 cylindrical; peristome single of 16, usually deeply divided, teeth 

 (or wanting, and capsule indehiscent). Astoimim, JVcisia, Did- 

 yinodon, Barbiila, Phascmn, Poftia, Tortula, Eiicalypfa. (Pf. I, 

 3. 380.) 



Family 12. Grimmiaceae. Tufted or pulvinate mosses with 

 short, solid leaves, and capsule regular, on a straight or curved 

 pedicel; peristome single of 16 teeth. Griimiiia. Rhacouii^riimi. 

 (Pf- I. 3. 439-) 



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