Peat-Mosses 



Spores. Small, mature in June-August. 



Distribution. Widely distributed in cooler regions. 



The Rock Andreaea (Andreaa rupestris), Turner. 



Andreaea rupestris has lance-shaped leaves, smooth 

 with a vein extending beyond the apex. 



This moss is common 

 in the mountains of 

 Georgia and North Caro- 

 lina, descending to the 

 plains northward. 



The specific name 

 from the Latin rupes, a 

 rock, refers to its habitat. spore-case 



open. 



and 



I 



Leaves. 



Fertile plant, spore- 

 case immersed. 



Sporophy te 

 still carrying its 

 veil, one peri- 

 chaetial leaf at 

 the base of the 

 pedicel. 



A. rupestris. 



Genus SPH/ERANGIUM, Schimp. 



The Species of the Genus Sphaerangium are minute bud-like 

 plants with spore-case immersed, without stems, growing on the 

 ground in clusters, but with no protonema at the base. The lower 

 leaves are small, while the upper are large, somewhat twisted and 

 overlapping as shingles. They are concave or keeled and covered 

 with minute protuberances on the back or on both surfaces. The 

 spore-cases are spherical and for this reason Wilhelm Philipp 

 Schimper gave them their generic name Sphcerangium, from the 

 Greek o-faipa, a ball, and ayyelov, a vessel. The cases with their 



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