Mosses and Lichens 



PART III 



LIVERWORTS OR HEPATICS 



Ribbon-like or Thalloid Hepatics . . . 93 



Marcbantia polymorpha . . . 93 



Names of parts .... ... 95 



Description of development ..... 95 



Leafy Hepatics, Scale Mosses and Foliose Hepatics 99 



Porella platypbylla . . ... 99 



Names of parts . . . . 99 



Genus Porella . . ..... 100 



Porella platypbylla . . . . . 101 



Genus Frullania . .... 102 



Fmllania eboraccnsis ..... 103 



Genus Ptilidium . . . .104 



Ptilidium ciliare . .... 104 



Genus Bazzania . . .... 150 



trilobaia ...... 106 



PART IV 



LEAFY-MOSSES 



Genus Sphagnum ........ 109 



The method by which Peat-mosses encroach 



upon water to form land ..... 109 



The pale tint of Peat-mosses ..... 116 



The method by which Peat-mosses absorb water 1 16 



The development of organs . .119 



Synopsis of Genus Sphagnum . . .122 



Sphagnum acutifolium ...... 123 



molle . ..... 123 



subsecundum ..... 124 



nibellum ....... 125 



cuspidatum ...... 126 



squanosum ...... 128 



cymbifolium ...... 128 



Genus Andreasa ..... ... 130 



Andrecea pelropbila . ..... 132 



mpestris ....... 133 



Genus Sphaerangium ....... 133 



Spharangium muticum ...... 134 



Genus Phascum . . . . . . . '35 



Pbascum cuspidatum . .... 136 



x 



