498 HEPATIC^E. 



Found on the Continent, North America, &c. 



Obs. — When floating the ribbon-like processes are long and 

 abundant, sometimes they are only faintly tinged purj)le ; when 

 growing on land, they frequently disappear, or are only few. 



Description of Plate CCXXV. — Fig. 1. Plant natural size 

 {Lindenberg). 2,3. Ditto (BischofF). 4. Plant, slightly magnified 

 (Bischoff). 5. Cross-section of frond, magnified (Lindenberg). 

 6. Cross-section of portion of frond, showing immersed capsules, 

 magnified (Bischofi"). 7. Ditto, showing antheridia (ditto). 8. 

 Epidermis, magnified (ditto). 9. Hair-like process, magnified 

 (ditto). 10. Capsule, magnified (ditto). 11. Young spores, 

 magnified (ditto). 12. Spores, magnified (ditto). 



Suborder IV. ANTHOCEUOTACE^E. 



Genus 56. ANTHOCEROS, Mich. 

 Anthoceros, Mich. Gen. PI. (1729). 



Fronds dark green or blackish, often orbicular ; nearly plane 

 or with centre depressed, radiately lobate ; lobes variously 

 divided; costa very wide, confluent, confused with the pagina; 

 texture lax, vesicular, with large chlorophyl granules, frequently 

 glandularly thickened at the apex or in streaks along the middle 

 so as to appear nerved. Inflorescence monoicous or dioicous. 

 Involucre tubular. Capsule pedunculate, exserted, linear or 

 cylindrical, very long, oblong, bivalved, furnished witli a 

 columella. Elaters in a few species perfectly spiral, in most 

 only undulate or sinuate, simple or branched, often geniculate, 

 more or less heteromorphous, fibres wanting or indistinct. 

 Spores papillose or smooth. Antheridia irregularly disposed on 

 the antical surface of the frond. 



