POTTIACEAE loi 



The stems of Weisia are so short that it is not likely 

 to be collected except when in fruit. The small size of 

 the plants, long hair-like leaves, short seta, and short 

 capsule, all help to distinguish Weisia from other 

 mosses. It is nearest in size to Pottia (p. io6), but the 

 leaves of Pottia are much broader and the capsule is 

 top-shaped. Ditrichum pallidum (p. 80) has short 

 stems, hair-like leaves, and yellow seta, but the seta is 

 much longer and the capsule is larger. In Dicranella 

 (p. 84) the hair-like leaves are turned to one side. 

 Tortella caespitosa (p. 103) is another short-stemmed 

 moss, but the leaves are much broader, more crisped 

 when dry, and the capsule is longer. 



12. HYMENOSTYLIUM Brid. 



(Hy-men-o-sty-li-um) 



A genus of wide distribution, containing several 

 species occurring chiefly in limestone re- 

 gions. Name derived from the Greek, 

 referring to the structure of the capsule. 



Hymenostylium curvirostre (Ehrh.) 

 Lindb. (Gymnostomiim curvirostre Hedw.) 

 is found in our range. EynunostyUum 



curvirostre 



Plants thickly crowded together, growing on Capsule en- 

 moist rocks, usually limestone, in mountainous 

 or hilly regions, and along the coast; hrigJit green above, 

 brownish below; not common; fruit sometimes abundant. 



Stems erect, very slender, ^-4 inches long; branched. 



