+6 



HEPATICAE 



Fig. 41. A. Marchant'ia polymorp]\a\j. 1. Male plant with empty cup (bulbils removed). 



2. Section through thallus, showing air chambers. B. Metzgeria. 1. Section of 

 thallus. 2. Female twig. C. jungermania. 1. Portion o( stem. .'.. Perianth. 



3. Involucre. D. Plagiochila. 1. Portion of stem. 2. Perianth. 3. Feat. 

 E. Lepidozia. 1. Piece of plant. 2. Leaf. 3. Perianth. F. Frullania. 1. Piece 

 of plant, seen from below, a. Amphigastrium. ws. Water reservoir. 2. Peri- 

 anthium. (i. Lejeunea. 1. Piece of plant. 2. Pcrianthium, the sporogone shining 

 through. All figures variously enlarged, from sketches by F. Stephani. 



