1920] 



TAYLOR— SUCCESSION OF MOSSES 



459 



mes 



from desiccation, certain species may 



frequent. 



Thelia Lescurii, a 



green moss growing in loose mats 



dominant and sometimes covers areas of several square feet. 

 Anomodon rostratus also appears frequently, and A. attenuatus 

 occasionally. Climacium americanum and Rhodobryum roseum 

 may be found in sheltered spots but not in large quantities. 

 Ceratodon purpureus is characteristic in open, less shaded places, 

 while Catharinea undulata occurs here and there. A thick con- 

 tinuous moss carpet is never found among the oaks as in the pine 



• TABLE I 

 Presence of moss species in associations of sand dune succession 



Species 



Cottonwood 



Anomodon rostratus 



Bryum ventricosum 



Bryumcaespiticium 



Catharinea undulata 



Ceratodon purpureus 



Climacium americanum. . 



Fissidens cristatus 



Funaria hygrometrica . . . 



Leucobryum glaucum 



Mnium cuspidatum 



Rhodobryum roseum .... 

 Thuidium delicatulum. . 

 Thuidium recognitum. . 



Thuidium abietinum 



Thelia Lescurii 





p 

 p 



p 



Pine 



P 

 P 

 P 

 P 

 P 

 P 

 P 

 P 

 P 

 P 



P 

 P 

 P 



Transition 

 pine-oak 



p 



p 

 p 

 p 

 p 

 p 

 p 

 p 

 p 

 p 

 p 

 p 

 p 



Oak 



P 



P 

 P 

 P 

 P 

 P 

 P 

 P 

 P 

 P 

 P 



P 



Beech-maple 



P 



dune. As we go still farther south into the later stages of the 

 oak associations, the moss flora becomes less, until about the only- 

 species left are Thelia Lescurii and Catharinea undulata in shaded 



places, with 



purp 



more 



and rarely Bryum argenteum 

 In forests where white oak is 



dominant 



in 



moss 



Table I shows the sue- 



mosses as thev have been found m 



the sand dunes. P indicates presence of species. Only the 

 species which occur in two or more associations are included. 



