American Species of Marchantia. 283 



Marianne Islands in the Pacific, the second from the Falkland 

 Islands, and the tliird from Brazil. The first specimen may be 

 regarded as the type of the species since it is mentioned first. 

 A portion of this specimen in the herbarium of the New York 

 Botanical Garden shows that the type is distinct from M. papil- 

 lata, as here understood, but that it is very close to M. emarginata 

 and perhaps synonymous with it. Nees von Esenbeck's inclu- 

 sion of M. platycnemos among the synonyms of M. papiUata 

 must therefore be considered as applying to a part only of 

 Schwaegrichen's species as originally described. 



Of Raddi's original figures, /. 5 is said to represent male plants 

 and /. 4, female plants. This is obviously an error, the recep- 

 tacles shown under /. j being clearly female. In /. Jfl six 

 receptacles are drawn, two showing six lobes apiece and one 

 seven lobes, the number being doubtful in the other three. In 

 /. 56 an enlarged receptacle with nine lobes is represented; the 

 lobes show clearly the enlarged apices with more or less distinct 

 emarginations, and no dift"erence is brought out between the basal 

 sinus and the others. The receptacles shown in /. 4 are very 

 doubtful and bear a disc which is scarcely lobed at all. Unless 

 drawn from very immature material they probably belong to 

 some other species than M. papillata. It should be noted, how- 

 ever, that the Synopsis describes the disc of the male receptacle 

 as "subdimidiato excentrico marginibus repando-lobatis," thus 

 evidently recognizing a male receptacle in Raddi's so-called 

 female receptacle; but Stephani apparently discards this view, 

 since he does not mention the male receptacles at all. 



The specimen of M. papillata, quoted above as the type, is in 

 the Mitten herbarium and was received from Hooker. It is 

 very fragmentary but includes three female receptacles, two 

 showing eight lobes apiece and tlie third, seven lobes. The 

 dilated apices of the lobes and the broader basal sinus are clearly 

 apparent. This specimen has been carefully compared with the 

 other specimens cited and found to agree with them in all essen- 

 tial respects. Spruce compares M. suhandina with both M. papil- 

 lata and M. Berteroana, which he knew from description only. 

 He ascribes to the species, however, a polyoicous inflorescence 

 and monospiral elaters. Unfortunately the specimens which he 

 distributed, although agreeing with his description in other 

 respects, show a strictly dioicous inflorescence and bispiral 



