JIICCIA. 483 



4. Near Yarmouth, Bawson Tamer ; Gcorr/e Fitt. 5. Sellach, 

 near Ross, Herefordshire, 72^^?. A. Let/, 1872 ; B. Jf. IFatkifis, 1881. 

 8. On a stone in Collin's Lane, Coleman ; Stubble field, Twycross, 

 Leicestershire, Hlo.ram. 10. 



Found on the Continent, North Africa, and in North 

 America. 



Obs. — A very distinct species and the only known British one 

 of the i^enus. 



Description of Plate CCXV.— Fig. 1. Plants natural size 

 (W. H. P.). 2. Ditto X 2. 3, 4. Ditto x 4. 5. Perianths in 

 different stages of growth with portion of frond and rootlets x . 

 G. Portion of rootlet x . 7. Portion of frond with section of 

 perianth («) showing pistillidia and (//) gemma. 8. Youn"- 

 capsule X . i). Half-ripe capsule x. 10. Half-ripe spores 

 x. 11. Perfect capsule x. 12. Portion of calyptra x. 

 13. Cross-section of capsule {(t) and a ripe spore {J)). 14. Gem- 

 ma) X (Bischoff). 



Suborder III. lUCCIACLE. 



Genus 5:3. RICCIA, MicL 



Jliccia, Mich. PI. Gen. (1721)). 



Fronds generally disposed in rosettes, at first radiating from 

 the centre, which often decays, segments bifid or dichotomous; 

 antical plane, depressed or canaliculate ; postical usually convex, 

 smooth or squamulose; margin either naked or ciliate ; epidermis 

 usually distinct, without pores. Fruit immersed in the interior 

 of the frond, rupturing antically, sessile. Involucre none. Calyptra 

 delicate, coherent with the capsule, style-bearing, style persistent, 

 protruding. Capsule spherical, sessile, indehiscent within the 

 calyptra. Spores tetrahedral, alveolate or muriculate. Kootlets 

 papillose within. 



