548 



INTRODUCTION TO CRYPTOGA^IIC BOTANY. 



are reducible with certainty to 0. vulgatum, which is dis- 

 tributed through almost every part of the globe. In some 

 cases several spikes are produced instead of one. Sometimes, 

 however, the frond is dichotomous, as in a species from 

 Malacca in the Hookerian Herbarium, indications of division 

 having previously occurred in 0. iJenduluTn, and sometimes it 

 is digitate, as in 0. palmatum, a species from Bourbon and 

 South America, which has been considered a genus under the 

 name of Cheiroglossum. It has, however, no more right to 

 be separated than Schizcea dichotoma from S. jlabellum. 

 This species is remarkable for numerous marginal spikes of 



Fig 118. 



Phylloglossum Drummondii, natural size, togetliei* with one of the 

 bractes, with its sporangiiim magnified. From a New Zealand specimen 

 given to me by Dr. Hooker. 



sporangia arising from some of the transformed lobes, for its 

 stem sometimes assuming at the base the scarlet tint which 

 occurs in Lycopods, for its fernlike rhizoma, and its grow- 

 ing on the trunks of trees. Botrychium has divided fronds, 

 and the fruit, consisting of globose sporangia, opening trans- 

 versely, is produced on spikes springing from the base of 

 the frond, or occasionally at the same time on some of the 

 pinnules. B. Lunaria is found in Tasmania, and the New 

 Zealand species is a native of Virginia and of many other 

 countries, but of no part of Europe except Norway, from 



