Family ORTHOTRICHACEAE 



A FAMILY containing several genera, two of which, 

 Orthotrichum and Ulota, are widely distributed and a 

 third, Drummondia, is occasionally found in our range. 



21. DRUMMONDIA Hook. (Drum-mond-i-a) 



A small genus, but one species occurring in our 

 range. Named after Thomas Drummond, an American 

 botanist and collector. 



Drummondia clavellata Hook, grows on trunks of 

 trees — very rarely on rocks — in the woods, but is 

 only occasionally found. It is the one species of the 

 acrocarpous mosses most likely to be mistaken for a 

 pleurocarpous moss, as the stems are creeping with 

 numerous erect branches; but the fruit is always terminal. 



Plants growing on trunks of trees in flat, often dense, 

 mats; rather dark green above, blackish below; fruit some- 

 times abundant. 



Stems, long, creeping; with numerous 

 stout, erect branches usually ^-/^ inch 

 Drummondia clavellata i^^g, SO thickly set that the Stem is 

 almost wholly concealed. 



Leaves short and broad, often too small to show entire 

 outline; somewhat spreading when moist; closely folded 

 when dry. 



