CALYMPEKACEAE. 481 



of about 125 species, widely distributed in temperate and tropical regions. 

 Type species: Rypnum bryoides L. 



Leaves entire, bordered all around, cells smooth. 1. F. monandrus. 

 Leaves serrate, bordered only at base of duplicate blade of upper- 

 most leaves; cells papillose. 2. F. Oarbcri. 

 Leaves not bordered, margins serrate, cells mamillose. 3. F. radicans. 



1. Fissidens monandrus Matt. Journ. Linn. Soe. 12: 598. 1869. 



Plants small, pale-green, erect or decumbent; seldom more than 2-5 mm. 

 high; leaves 4-7 pairs, palmately spreading, and increasing in size upward to 

 2 mm. long by 0.33 mm. wide, overlapping and narrow at base; margins 

 bordered all around; costa percurrent; cells smooth, somewhat oblique and 

 hexagonal, those of the lower blades larger at base. Autoicous. Pedicel erect, 

 bent at base, 3 to 4 mm. high; capsule straight, seldom more than 1 mm. long; 

 peristome red, paler and spiral at apex; lid beaked; calyptra small; spores 

 smooth. 



Only known from one collection from a sinkhole, Farringdon Road, New Provi- 

 dence : Florida ; Cuba and the West Indies to South America. Diminutive Fissidens. 



2. Fissidens Garberi Lesq. & James, Proc. Am. Acad. Arts &Sci. 14: 137. 1879. 



Plants minute. Stems simple, seldom more than 2-3 mm. high, erect or 

 decumbent ; leaves 48 pairs, most numerous on the sterile plants, usually all 

 unbordered, except the two uppermost leaves of the fruiting plants which are 

 longer and narrower than the others; vein ending in the acute apex; margins 

 minutely serrate, with acute or truncate teeth; cells dense, with 2-4 small 

 papillae, basal cells larger, papillose only on the outer surface; perichaetial 

 leaves bordered only at the base by an obscure border of 1-3 rows of cells. 

 Dioicious. Pedicel terminal, erect, short, 1-2 mm. ; capsule small, 0.6 to 1 

 mm. straight; lid beaked; teeth spirally thickened at apex; spores smooth. 



On rotten wood and rocks in sink-holes, coppices on Farringdon Road, New 

 Providence : Florida ; Louisiana ; West Indies and South America. Garbee's Fissi- 

 dens. 



3. Fissidens radicans Mont. Ann. Sci. Nat. (II.) 14: 345. 1840. 



Plants in dense, bright-green cushions. Stems decumbent and recurved 

 when dry, rarely erect or simple, branching repeatedly, rarely more than 1 cm. 

 high; leaves circinate, often brittle and broken off, 5-10 or rarely 20 pairs, 

 up to 1.5 mm. long by 0.33 mm. wide ; vein ending below the acute apex ; cells 

 swollen, mamillose on both surfaces above, and only on the outer below. 

 Autoicous; antheridial buds sometimes numerous on the fruiting plants. Pedi- 

 cel slender, erect, 3 4 mm. long; capsule up to 1 mm.; lid beaked; calyptra 

 small, apical; teeth papillose and spiral at apex; spores smooth. 



On rotten wood in coppices, New Providence and Abaco : Florida and the West 

 Indies to continental tropical America. Radicant Fissidens. 



Family 3. CALYMPERACEAE C. Muell. 



Calymperes Family. 



Plants usually growing in dense dark green cushions on trees in shade 

 seldom fruiting but often propagating by brood-bodies, growing in clusters 

 from the tips of specially modified leaves. Stems mostly ereel and sparingly 

 branched. Leaves often crow r ded at the ends of the branches, erect or 

 spreading, broad and clasping at base, lanceolate or contracted into a 

 spathulate apex; margins entire or serrate, often with a band of elongated 



