292 



Hemitriohia clavata Rost. 



Hemitrichia intorta Lister. 



Hemitriohia Karstenii Lister. 



Hemitrichia stipata Mass. 

 Order II. Arcyriaceae. 



37. Ai-cyria pucinea Pers. 



Areyria stipata List. 



Arcyria digitata McBr. 



Areyria albida Pers. 



Areyria incarnata Pers. 



xVrcyria nutans (Bull.) Grev. 



Areyria ferruginea Sant. 



Areyria flava Pers. 



Arcyria insignis Kalchbr. and Coolce. 

 39. Perichaena variabilis Rost. 



Perichaena c-lirysosperma List. 

 Order III. Margaritaceae. 



41. Dianema depressum List. 

 Order IV. Lycogalaeeae. 



43. Lycogala miniatum Pers. 



Lyeogala exigium Morg. 



Lycogala flavo fuscum Rost. 



A Study of the Histolo(}y of the Wood of Oektain Species 



OF Pines. 



Katherine E. Golden. 



The conifers grow in thiclcness similarly to the dicotyletlous, but their 

 wood differs very considerably, particularly the secondaiy wood, in which 

 wood vessels are entirely absent. In the first-year wood a few vessels are 

 developed close to the pith, but the after-growth is composed entirely of 

 tracheides. The tracheides are fibre-like elements with peculiar bordered 

 pits, and are very similar in their appearance in the different species, and 

 yet the wood, talc en as a whole, differs vei-y materially, varying from the 

 veiy soft, light Avood of tlie wliite pine to the hard, dense wood of the 

 long-leaf pine. 



