81 



Bartramia. 



B. pomiformis. 



Leaves costate, sernilo, lon^ acuminate, narrow. Usually papillose, 

 yellow green, revolute below. Seta short. Capsule Rlobose, striate. 

 Plants robust, forming large wooly tufts in wet cool places. Mature in 

 spring. 

 Bryum. 



The capsule of the Bryum is unsymmctric, inclined or pendulous, fairly 

 large, mostly pear-shaped. Seta is long. Operculum conical. Plants 

 vary in size. 



B. argenteum. 



This species is found in dry soil between rocks or cracks in wall. They 

 are small, silver gray in old plants. Costa ends below the apex. Plants 

 small, julaceous. Seta dark red. Mature in autumn. 



B. bimum. 



Leaves acuminate, serrate at apex, decurrent, margin revolute, costa red 

 or purple. Capsule pendent or pyriform, inclined. Plants moisture- 

 loving, large bright green, loosely cespitose. Mature in summer. 



B. caespUicium. 



This is our most common form. Leaves mostly entire, acuminate, with 

 costa excurrent, ovate lanceolate, margin revolute, slightly serrate, im- 

 bricate, narrowly acuminate. Capsule horizontal or pendent, oblong 

 pyriform. Cells of the leaf narrow at margin. Plants form dense tufts 

 on dry soil; they are bright green, of medium size. Mature in spring or 

 summer. 



BUXBAUMIA. 



B. aphylla. 



Capsule ventricose, exserted, oblique. Leaves few at base. No 

 chlorophyll. Protonema brown. Plants very minute. Found on the 

 ground or on rotten wood. Mature in spring. 

 Catharinaea. 



C. angustata. 



In the genus Catharinaea, the calyptra is conical, the capsule cylindric. 

 The leaves are bordered, large, obtuse, but not so serrate as in undtdata. 

 Costa is wider, the leaves narrower. Plants found in dry, more open 

 situations. 

 C luidulala. 



Resembles the above, but the leaves are strongly undulate transversely, 

 while the costa occupies but a smaller part of the leaf. Plants are densely 

 cespitose, and grow in moist shady places. Both forms of Calharinaea 

 mature in autumn or winter. 

 Ceratodon. 



C. purpureiis. 



A common moss of fields, pastures and roadways. Leaves costate, 

 entire, acuminate, long lanceolate, with margin revolute. Apex slightly 

 serrate, often reflexed. Capsule dark red, horizontal, ovate oblong, 

 striate, sulcate when dry, neck short. Plants dark green, growing close 

 together, of medium size. Mature in spring. 



