NECKERACEAE I 15 



closely appressed when dry, spreading when moist; leaf cells 

 thick-walled; several rows of marginal cells roundish-quadrate; 

 the lower median linear-fusiform, gradually changing to oval at 

 the apex; basal cells often brownish or reddish yellow. Dioicous. 

 Calyptra cucullate, smooth, often attached below the capsule 

 by the connate base. Capsules exserted or emergent, erect and 

 symmetrical; peristome apparently simple, teeth 16, articulate 

 and papillose, bifid or occasionally trifid; inner peristome re- 

 duced to a narrow inconspicuous membrane. 



L. brachypus Brid. Orient, Latham; Guilford and New 

 Haven, Bry. Ct. 



L. julaceus (Hedw.) Sull. Moriches (H. S.!), Bath, Brainerd 

 and Cold Spring!!, L. Id. "On trees common" Muse. App. 258. 



FORSSTROEMIA Lindb. 



(Leplodon of L. & J. Manual) 



Much like Leucodon, but distinguished in all our species by 

 the abundant branching of the secondary stems and by the 

 hairy calyptra. Many species have strongly costate leaves and 

 most are less glossy than Leucodon. 



F. trichomitria (Hedw.) Lindb. Common on trees and rocks, 

 Muse. App. 254; Closter, Austin, Bx! 



CRYPHEA Mohr. 



Cryphea glomerata B. & S. "Red Cedars, Palisades, N. J., 

 rare," Muse. App. 253. 



Family 25. NECKERACEAE 



Mostly growing on rocks and trees. Primary stems creeping 

 and defoliate; secondary stems erect, horizontal, or pendent, 

 irregularly to pinna tely branching; leaves large, ovate-lanceo- 

 late to Ungulate or cultriform, acute, obtuse or apiculate, ecos- 

 tate or with a slender costa ; leaf cells not papillose, short, rhom- 

 bic to linear, quadrate to roundish on the margins. Calyptra 

 smooth or hairy; capsule erect and symmetric, immersed or 

 emergent, rarely with seta longer than perichaetium; peristome 

 single or double. 



