POLYTRICHACEAE 19 



POGONATUM Beauv. 



The Pogonatums differ from the Hair-caps mainly in the 

 cylindrical capsules, not square or angular in section. The 

 teeth are thirty-two and the capsules are straight or curved. 

 The spores mature in autumn or winter, except in P. alpinum, 

 in which they mature about July. Our species are small plants 

 from persistent protonema. 



Leaves lanceolate-subulate, serrate; capsules erect brevicaule 



Leaves Ungulate, blunt, entire; capsules inclined when fresh, .brachyphyllum 



P. brevicaule (Brid.) P. B. [P. tenue (Menz.) E. G. B.l 

 Frequent on bare soil. 



P. brachyphyllum (Mx.) P. B. Grassy hills, Orient, Latham!! 

 "Sandy loam, Toms River, N. J.," Muse. App. 234. 



CATHARINEA Ehrh. 



Leaves not sheathing and but slightly embracing the stem, 

 Ungulate or ovate-oblong, crisped when dry, with a few (1-7) 

 narrow lamellae; margins bordered, serrate, teeth often in pairs. 

 Calyptra merely roughened with a few vestigial hairs. Capsule 

 cylindric, often somewhat curved; operculum long rostrate; 

 peristome of thirty-two teeth. 



The sporophyte of the Catharineae is in good condition from 

 late autumn to early spring. 



Key 



1 — Leaf cells distinctly papillose Macmillani 



Leaf cells smooth 2 



2 — Capsule 4: 1; leaves not at all wavy on the margins when moist, 



lamellae inconspicuous crispa 



Capsule 6-8: 1 ; leaf margins wavy when moist 3 



3 — Midrib constituting } -s-Vio of leaf undidata 



Midrib constituting Vs-}{ of leaf angustata 



C. crispa James. Frequent in fresh water marshes and along 

 moist banks of streams, especially along the south shore of 

 L. Id. 



C. angustata Brid. Very common on rather dry sandy soil, 

 particularly if somewhat shaded. Mr. Geo. S. Bryan, of the 

 Univ. of Wisconsin, has made studies showing that we have 

 another species or that this is frequently monoicous. 



