198 HEPATIC^. 



2-3 pairs, embracing the base of the perianth, or subremote, 

 similar to stem leaves, but often much larger, shortly bifid, unequal, 

 repand, from base to nearly the middle composed of two layers of 

 cells ; pistillidia few, small. Perianth large, lanceolate- fusiform 

 when fruiting often elongate and almost linear, deeply trigonous, 

 from base to near the apex usually composed of two layers of cells 

 (at the keels and lower half often 3), near the middle a cross- 

 section shows a double row of about 150 small cells, smaller 

 perianths with 60-100 cells round, mouth contracted, narrow, 

 with 10-15 short, hyaline, obtusely rounded marginal cells. 

 Calyptra half the size of the perianth, lower half 2 cells tliick, 

 afterwards the apex unequally bivalved, surrounded at the base by 

 the barren pistillidia. Pedicel more than twice the length of the 

 perianth. Capsule oblong, reddish-brown, composed of two layers 

 of cells. Spores globose, smoothish, broader than the elaters, 

 pale reddish-brown. Elaters of a paler colour than the spores, 

 bispiral, short, obtuse, about 12 turns of the spiral. Androecia 

 terminal, short, rarely occupying the whole branch ; perigoniai 

 bracts usually 5-7 pairs, closely imbricate, ovate, bifid, concave, 

 swollen; perigoniai bracteole oblong, entire or bifid; antheridia 

 very large, single, oval, surrounded by leafy processes in the 

 bracts. 



Fruits May. 



Dimensions.— Stems J to 1 inch long, -1 mm. diam., with 

 leaves near the apex 1*25 mm. wide; leaves 1- mm. x "55 mm., 

 segments "25 mm., 2 mm., "9 mm. x '45 mm., seg. '3 mm., 

 '25 mm., I'l mm. x '5 mm., seg. '3 mm., '7 mm. x "4 mm., seg. 

 "25 mm., "5 mm. x "3 mm., seg. "275 mm., 35 mm. x "15 mm.; 

 cells "06 mm. x '02 mm., '08 mm. x '02 mm., '05 mm. x '02 mm., 

 •05 mm. X "03 inm. ; stipules "8 mm. x "5 mm., seg. '3 mm., 

 1'2 mm. X "5 mm., seg. "3 mm., "25 mm., 1"1 mm. x "5 mm., seg. 

 "3 mm., "35 mm. x '12 mm. ; bracts 1'65 mm. x "55 mm., 1'25 mm. 

 x '65 mm., seg. "3 mm. ; bracteole 1*35 mm, x '6 mm., seg. '3 mm. ; 

 perianth 2* mm. x '5 mm., 2*25 mm. x "65 mm. ; pistillidia 

 •13 mm. X "04 mm. ; capsule "6 mm. x '35 mm. ; spores '02 mm. ; 

 elaters •I mm. x "0125 mm. ; perigoniai bracts ^6 mm. x "45 mm.. 



