288 HANDBOOK OF BRITISH HEPATICJE. 



likewise occasionally marked with darkish spots 

 (fig. 198). 



Genus 49. SPH/EROCARPUS, Mich. 



Involucre none. Perianth pear-shaped, 

 smooth, pierced at the apex, aggregated on 

 the surface of the frond. Calyptra crowned 

 with a deciduous style. Sporangium at 

 length nearly free, globose, indehiscent ; 

 spores destitute of elaters. 



Sphaeroearpus terrestris, Mich. 



Fronds growing singly, or in patches 

 \ to \ inch in length, flat, margin slightly 

 lobed, thin, of a pale-green colour, adhering, 

 by the underside, by means of numerous 

 radicles, upper surface bearing the pear- 

 shaped follicles. 



Sphcerocarpus terrestris, Mich. Nova. Gen. 4, 

 t. 3 ; Dill. Muse. 536, t. yS, f. 17 ; Eng. Bot. 

 t. 299; Hook. Muse. Britt. 215; Eng. Fl. V., 

 i., p. 99; Carr. and Pears. Exs. No. 215 ; 

 Linden. Mon. 496, t. xxxvi., fig. 1. Sphce- 

 rocarpus Michclii, Bell. Act. Taur. V., 258 ; 

 Cooke Hep. f. 195. 



On the ground, especially clover fields. 



Fronds growing singly, or collected in patches, on 

 the ground, \ to \ inch long, plane, slight!}' waved, 

 margin variously lobed, lobes short and rounded, 



