220 A MANUAL OF MOSSES 



2. HOMALIA (Bridel) Bryologia Europssa. 



Dioicous or autoicous : slender to robust, in wide, more or 

 less lustrous, dark colored, matted tufts: primary stems with 

 stolons ; secondary stems mostly irregularly dichotomous, non- 

 flagellate; leaves 4-seriate, comptanately spreading, unsym- 

 metric, spatulate to Ungulate frorti a slightly decurrent base, 

 rarely rounded, obtuse, non-bordered, with apex entire or 

 serrulate; costa simple, incomplete or none; upper leaf-cells 

 rounded to hexagonal, lower elongate, at least the median so, 

 rarely all linear; inner perichastial leaves, short-sheathing, 

 lanceolate, acute ; seta long, mostly smooth ; capsule mostly 

 erect to cernuous, oblong from a narrowed base, when old 

 sometimes arcuate, red-brown, rarely almost pendent and 

 short-oval ; annulus 2-seriate ; peristome double, inserted at the 

 mouth ; teeth linear-subulate from a broader base, yellow to 

 brownish, apically hyaline, mostly transversely striate and 

 with well-developed lamellae ; inner peristome yellow, papillose, 

 basal membrane high, carinate, segments longer and almost 

 as broad as the teeth, broken through in places along the keel, 

 cilia mostly rudimentary and fugaceous, sometimes well-de- 

 veloped and appendiculate : lid conic, obliquely rostrate; ca- 

 lyptra cucullate, mostly glabrous; spores small, brownish. 



About 60 species on trees, rocks, and stones, mostly in 

 temperate regions ; 7 species in North America ; one species 

 in our region. 



1. Homalia jamesii Schimper. 



In straggliiig tufts, shining yellow-green, repeatedly dis- 

 tichous, stoloniferous : stems slender, interruptedly foliate by 

 the: numerous innovations; the branches strongly complanate- 

 foliate; leaves cultriform, sub-falcate, oblong, obtusely apicu- 

 Ikte, minutely serrulate above the middle, striolate lengthwise 

 when dry; costa faint, slender, reaching, half-way or more; 

 lower median leaf-cells linear-fusiform, the apical and mar- 

 ginal about 1.5-1:1, about as broad as .long, rhomboidal: seta 

 about 1.5 cm. long, slender; capsule erect to cernuous, oblong- 

 cylindric, about 2.5:1, symmetric, when dry scarcely con- 

 stricted below the mouth ; peristome double, teeth long, yellow- 

 ish, confluent at base, inner peristome about as long as the 

 teeth, the segments narrow, sub-linear, more or less carinately 

 perforate, cilia rudimentary and solitary or none; annulus 

 present ; spores mature in fall but capsules rarely found. 



On rocks and in crevices, in mountainous or hilly dis- 

 tricts; from Newfoundland and Nova Scotia to Pennsylvania, 

 also in Washington State. Possibly will be found to occur 

 in the eastern part of our region. 



