igS MOSSES WITH A HAND-LENS , 



both Stem and leaves on many of the lower plants. (See Mar- 

 chantia.) 



Tomentose, covered with a thick felt of radicles. 

 Tooth. See under peristome. 

 Tubulose. See canaliculate. 



Tumid, turgid, appearing as if swollen from pressure within. 



Turbinate, top-shaped ; e. g., capsule of Bryum turbinatum. 



T-cvisted (seta). The seta of many mosses twists strongly 



in drying. If the twist is such as would be made by seizing 



the capsule and twisting it to the right, it is said to be twisted to 



the right. It is possible that this twisting of the seta aids in 



scattering the spores. 



Umbonatc, round with a projecting point in the 

 center. 



Uncinate, hooked, curved back at point. (Fig. 



Undulate, with an alternately concave and con- 

 vex margin, wavy ; e. g., leaves of Dicranum undula- 

 tum. 



Fig. 33- Urceolate, shaped like an urn or pitcher. 



Veil, the calyptra. 



Ventral surface, the surface of a leaf next the stem. 

 Ventricose, bulging on one side. (Fig. 33.) 

 Vesicular, inflated like a bladder. 

 Wavy. See undulate. 



ERRATA. 



P. 39. Accent Oncophorus as on p. 200. 



P. 64. Insert as the fourth line of description of Gymnos- 

 tomum rupestre " deshiscent operculum. Very much less frequent 

 than G. cur-" 



P. 108. Read " Family 18" instead of " Family 8." 



P. 157. Accent Lunularia as on p. 205. 



P. 159. Accent Reboulia as on p. 205. 



The accents are omitted from several of the generic names 

 due to a change of type and an oversight in replacing the accents 

 when the type was changed. 



