MOSSES. 



[ 610 ] 



MOSSES. 



*** Stegocarpi. Capsule bursting by a lid. 



Distichophylla. Leaves arranged in two 

 straight roios. 



a. Leaves regularly vertical. 

 SCHISTOSTEGE^E. 



b. Leaves regularly subvertical. 



DBEPANOPHYLLEJE. 



c. Leaves horizontal. 



DJSTICHIACE^:. Areolation of the leaves 

 parenchymatous, minute ; leaves without 

 appendicular laminae. 



FISSIDENTEJE. Areolation of the leaves 

 parenchymatous ; leaves produced into ap- 

 pendicular laminae at the back and point. 



Polystichophylla. Leaves arranged in 

 three or more straight alternating 

 rows. 



a. Leaves exhibiting narrow green cells, forming a reti- 

 culation between larger diaphanous cells. 



LEUCOBBYACE^E. Leaves composed of 

 several layers of columnar, empty, paren- 

 chymatous cells; the 'intercellular' green 

 cells three- to four-angled, interposed be- 

 tween the empty cells in a single curved 

 row. 



SPHAGNACE^;. Leaves composed of a 

 sir.gle stratum of empty prosenchymatous 

 cells, with intercellular green cells interposed 

 between all the empty cells. Cladocarpous, 

 branches fasciculate. 



b. Leaves without ' intercellular ' cells. 

 a. Leaves not papillose. 



1. Loosely areolated. 



FUNABIOIDEJE. Areolation of the leaf 

 parenchymatous, lax, containing much chlo- 

 rophyll. 



DISCELTACE^. Areolation of the leaves 

 rhomboid-prosenchymatous, destitute of 

 chlorophyll, empty, fuscescent. 



BUXBAITMIACEJE. Areolation of the leaf 

 hexagonal or polygonal, very minute, dark- 

 coloured, destitute of chlorophyll. 



2. Densely areolated. 



MNIOIDE^:. Areolation of the leaf in 

 parallelograms at the base, round-hexago- 

 nally parenchymatous towards the apex ; 

 very full of chlorophyll, or more frequently 

 thickened (very rarely papillose). 



BBYACE^. Areolation of the leaf prosen- 

 chymatous, ordinarily rhomboidal, abound- 

 ing with chlorophyll. 



DICBANACEJE. Cells of the leaf prosen- ' 



chymatous, very often intermixed with 

 parenchymatous cells (rarely scabrously pa- 

 pillose), alar basilar cells ordinarily crowded 

 and ventricose, or flat and much more 

 loosely reticulated than the upper cells. 



LEPTOTBICHACE^S. Cells of the leaf 

 rhombic at the base, rectangular or both 

 mixed further up, smooth, without proper 

 alar cells. 



b. Leaves papillose. 



BABTBAMIOIDE^:. Cells of the leaves 

 parenchymatous, square, ordinarily nodu- 

 lose or scabrous with papillae at the trans- 

 versal sides, never opaque. 



POTTIOIDEJE. Cells of the leaves paren- 

 chymatous, square, ordinarily covered on 

 all sides with papillae above 'the base, but 

 smooth and pellucid at the base. 



DIPHYSCIACEJE. Leaves of two kinds ; 

 the cauline with the cells densely hexa- 

 gonally parenchymatous, abounding with 

 chlorophyll, the perichaetial leaves with the 

 cells destitute of chlorophyll and more 

 loosely reticulated. 



PLEUROCARPI. 



Distichophylla. Leaves arranged in 

 two opposite rows. 



PHYLLOGONIACEJE. 



Tristichophylla. Leaves (twanged in 

 three rows, appearing like three, erect, 

 of two forms. 



HYPOPTEBYGIACEJE. Cells of the leaf 

 everywhere prosenchymatous, equal. 



Polystichophylla. Leaves arranged in 

 four or more rows. 



MNIADELPHACFJE. Cells of the leaf 

 parenchymatous, Mnioid. 



HYPNOIDEJE. Cells of the leaf prosen- 

 chymatous, rhombic or rounded. 



feiBL. Hooker, Taylor, and Wilson, Bryol. 

 Brit. ; Bruch and Schimper, Bryol. Eur. 

 Schimper, Cor. Bryol. Eur. 1855; Flora, 

 1850, 681 ; Hedwig, Theoria general. ; Bri- 

 del, Bryol. Universa ; Miiller, Syn. Muse, 

 frond. ; Dillenius, His. Muse. ; Lanzius- 

 'Beninga, Nova Acfa, xxii. 555 ; Hofmeister, 

 Vergl. Unters. 1837 : Ber. Sachs. Gesell 

 Wws. 1854; Flora, 1855, 434; Valentine, 

 Linn. Tr. xviii. 490; Hicks, Linn. Tr. xxiii. 

 1862,567; Braithwaite, Mosses; Stevenson, 

 Myc. Scot. 1879 ; Tripp, Br. Mosses, fgs. of 

 spec. ; Hervey, American Sea-mosses, 1881 ; 



