HYPNACEAE 99 



Subspecies Sendtneri (Sch.) Warnst. New Haven, Bry. Ct. 



Subspecies Wilsoni (Sch.) Roth. Budds Lake, N. J., Aus- 

 tin, and Small, Bx!; Bronx R., Bronx Park, E. G. B., Bx! 



D. fluitans (Dill.) Warnst. "Stagnant or sluggish water, 

 common," Muse. App., 410, East Marion. L. Id., Latham. 

 Summer. 



Var. near var. gracilis (Boulay) Grout covers bottom of small 

 pond near Vanderbilt Mausoleum, New Dorp, S. Id. 



Subspecies exannulatus (Guemb.) Warnst. Astoria, L. Id. 

 (H. S.) ! labeled Fontinalis. 



Var. falcifolius (Ren.) Grout forma viridis (Boulay) Grout 

 pool by road, Cold Spring, L. Id.!! 



D. uncinatus (Hedw.) Warnst. Wet shaded places in cool 

 woods. "Near Closter, N. J.", Muse. App., 412; Orange, etc., 

 Bry. Ct. Spring-summer. This is so common elsewhere that 

 it should be found more frequently than is here indicated. 



D. vernicosus (Lindb.) Warnst. " In open bogs and marshes 

 about Budds Lake, N. J.," Muse. App. 402. 



CALLIERGON (Sull.) Kindb. 



Large mosses usually found in swamps and wet places; usually 

 erect when growing in water. Central strand present in the 

 stem. Stem leaves large, not falcate or secund, broadly oblong- 

 ovate to nearly circular, usually very obtuse and cucullate at 

 apex, very concave, little or not at all plicate, with a single 

 strong costa reaching nearly the entire length of the leaf, or 

 ecostate; leaf cells narrowly linear; capsules unsymmetric, in- 

 clined to horizontal, with perfect hypnaceous peristomes. 



The old genus Hypnum included nearly the whole family as 

 here treated and it is very difficult to break it up into separate 

 genera satisfactorily. Though usually treated as a subgenus, 

 Calliergon seems to me far better characterized than several other 

 genera of the family that are generally recognized. The first 

 two species placed by Sullivant in Calliergon were Hypnum cuspi- 

 datum and H. Schreberi which much resemble the other species, 

 here included, but have their leaves ecostate or nearly so. 



