MUSCI 



57 



SYNOPSIS OF GENERA. 



[The figures in brackets indicate the number of species known from South Africa.] 



Fam. i. Sphagnaceae. 



(Plate 6, A and Vol. iv. plate 60.) 



Fam. 2. Andreaeaceae. 

 (Plate 6, B.) 



Fam. 3. Archidiaceae. 



(Plate 6, C.) 



Fam. 4. Fissidentaceae. 

 (Plate 6, E.) 



Fam. 5. Leucobryaceae. 



Fam. 6. Dicranaceae. 

 A. Alar cells not modified. 



a. Lid not distinct. 



I. Calyptra hood-shaped. 



II. Calyptra cap-shaped. 



b. Lid distinct, deciduous. 



I. Capsule with an elongated neck. 



(0 



(7) 



(38) 



CO 



1. Sphagnum 

 2. Andreaea 



3. Archidium 



4. Fissidens 



5. Leucobryum 



(3) 

 (3) 



0) 



6. Pleuridium 

 7. Bnichia 



. Trematodon 



II. Capsule devoid of neck, or with a short neck. 



[. Outer layer of teeth of peristome papillate or crosswise striate. 



x Capsule smooth. 



(1) 9. Ditrichum 



x x Capsule striate and grooved. 



(1) 10. Ceratodon 

 2. Outer layer of teeth of peristome punctate or longitudinally striate. 



x Antheridia arranged on a disc. 



(2) 11. Aongstrcemia 



x x Antheridia aggregated into a bud-like body. 



(3) 12. Dicranella 



B. Alar cells much larger, colourless and transparent or brownish. 

 a. Leaves not marginate. Midrib very broad. 



I. Teeth of peristome divided halfway down. 



(Fig. 42 A.) (17) 13. Campylopus 



II. Teeth of peristome divided to the base. 



(2) 14. Dicranodontium 



M. 8 



