INDEX TO INTRODUCTION. 



319 



Tillandsia?, 6. 

 Tortula, 25, 45. 



ruralis, 32. 



Trematodon, 34. 

 Trichostomum, 45. 



Vaginula, '20. 



\ . . i. :;i. 



Webera, 18. 



Weissia controversa, 35. 



