164 



MUSCINE.-E 



long fusiform thin-walled cells, marked internally by from one to three 

 brown spiral bands, but more complicated in structure in the foliose 

 than in the thalloid genera. 



Illustrative genera. — Foliose : Radula (Dum.), Jungermannia (L.), 

 IvCJeunia (G. & L.), Frullania (Radd.), Madotheca (Dum.), Mastigo- 

 bryum (N. ab E.), Calypogeia (Radd.), Lepidozia (Dum.), Plagiochila 

 (Dum.), Geocalyx (N. ab E.), Chiloscyphos (Cord.), Gymnomitrium 

 (N. ab E.), Lophocolea (Dum.). Thalloid', Metzgeria (Cord.), Aneura 

 (Dum.), Fossombronia (Radd.), Pellia (Radd.), Blasia (Mich.). 



Literature. 



Leitgeb — Bot. Zeit., 1871, p 556 ; and Abhandl. Bot. Ver. Brandenburg, 1880, p. 58. 



Gottsche — Abhandl. Gesell. Naturf. Hamburg, 1880, p. 39. 



Goebel — (Epiphytic Species) Ann. Jard. Bot. Buiienzorg, vi., 1887, p. 21. 



Order 2. — Monocleace.^. 



This small order appears to occupy an intermediate position be- 

 tween the Jungermanniaceae and the Anthocerote^e. The vegetative 

 structure is either thalloid or foliose. The elongated sporange dehisces 

 longitudinally, and contains elaters, but has no columel. 



Principal genus \ — Monoclea (Hook.). 



Fig. 144. — Anthoceros la^vhY,., 

 male plant (natural size). 



Fig. \d,2,.—Mono:lea ForstcnYiQ(^. (magnified). 



Fig. 145. -A. Icez'is. a, dehiscent sporange 

 (X 2). 



Order 3. — Anthocerote^. 



The vegetative structure consists of a flat ribbon-like thallus, the 

 irregular dichotomous ramifications of which form a circular disc 

 composed of one or more layers of cells, each cell containing only a 



