164 



MUSCINE^ 



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.), 

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

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

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

 (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. Builenzorg, vi., 1887, p. 21. 



Order 2. — Monocleace*. 



This small order appears to occupy an intermediate position be- 

 tween the Jungermanniacese and the Anthoceroteae. 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. — Antkoceros l(nfh\j.^ 

 male plant (natural size). 



Fig. t.^^,— Monoclea Forsieri Hook, (magnified). Fig. 145. —A, Itevis. a, dehiscent sporange 



(X 2). 



Order 3. — Anthoceroteae. 



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 



