NOTEWORTHY LEJEUNEAE FROM FLORIDA I49 



line of the free margin and does not form a distinct depression. On the 

 underleaves basal auricles are occasionally present, but they are never 

 well developed, and are always difficult to demonstrate. 



The South American P. torulosus is still incompletely known and 

 it is possible that the species, as at present defined^ represents an 

 aggregate. The type specimen was collected in "Guiana," and the 

 species has since been reported from Dutch Guiana, from Venezuela, 

 and from Brazil. In the Hepaticae Spruceanae specimens were 

 distributed from Obidos, Brazil, and from the vicinity of Chimborazo, 

 Ecuador. These and a portion of the type material in the Mitten 

 herbarium have been available for study. 



In the type specimen perianths are present but neither androecia 

 nor caducous leaves were detected. The plants are considerably 

 larger than those of P. heterophyllus, and the lobes, of the leaves are 

 relatively broader, measuring 1.1-1.3 mm. in length and 0.95-1.2 mm. 

 in width. The ventral margin of the lobe is further distinguished by 

 being distinctly revolute. The margin of the lobule is said to be 

 entire in the original description, but the marginal teeth were soon 

 noted by Lindenberg and Gottsche.^ They usually number four to 

 six and are less strongly inflexed than those of the new species but 

 resemble them in other respects. The underleaves measure about 

 0.5 mm, in length and 0.75 mm. in width; in most cases they show 

 small basal auricles, but these are not always distinct and may be 

 absent altogether. A leaf, an underleaf, an involucre, and a perianth 

 in cross section have been figured by Schififner,^'' presumably from 

 material in the Lindenberg Herbarium at Vienna. 



Spruce's specimens are scarcely larger than those of P. hetero- 

 phyllus, but their leaves agree in shape with those of the type from 

 Guiana, measuring about 0.75 mm. in width and scarcely more than 

 that in length. The underleaves, too, are much broader than long 

 and usually show distinct auricles. The free margin of the lobule, 

 however, offers a few distinctive features, when compared with the 

 type. Although the number of teeth is about the same, the apical 

 tooth is longer than the others and extends outward, instead of being 

 inflexed, a distinct sinus being thus formed between the apical tooth 

 and the distal portion of the margin. The other teeth are inflexed, 

 but not very strongly so. The branches with caducous leaves are 



^Linnaea24: 627. 1851. 



1° Hedwigia 33 : /)/. 7,/. 8-10. 1894. 



