290 A MANUAL OF MOSSES 



acuminate : seta slender, flexuous, erect ; capsules sub-erect to 

 cernuous from a short erect cpUum, oblong, arcuate ; lid convex, 

 mamillate; peristome hypnoid, the teeth yellowish, broadly 

 margined, rather distantly trabeculate, equalled in length by 

 the carinately split segments, the cilia shorter, unequal, no- 

 dose, two or three in number ; annulus large, usually 3-seriate ; 

 spores jnatiire in spring or early surnmer. 



Qn rocks in strearns in the mountains of northern and 

 temperate Eurqpe and Asia and, in North America, from the 

 Arctic regions south to the northern United States. Although 

 r^re in thjs district, so far as now known, this species may 

 eventually be found to be not uncommon in cool, rocky streamg 

 in the more rnpuntainous p^rts of our region. 



Westmoreland : In mpuntain rivulet, Mellon's estate, 

 Laurel Hill Mt., New Florence, Septem- 

 t^er 8-10, 1907. O. E. J. Sterile. (Fig- 

 ured). 



10. CAMPY UUM (Sullivant) Bryhn. 



Mostly dioicous : slender, rarely robust, mostly stiffly 

 cespitose, green to yellowish or brownish, drying more or less 

 lustrous ; stems creeping to ascending or erect, bushy to vari- 

 ously pinnate; leaves from a shprtly decurrent base broadly 

 ovate or cordate, gradually or abruptly narrowed into a long, 

 slender, canaliculate acumination which is mostly strongly 

 squarrose-reflexed, margin plane, mostly entire ; costa various, 

 mostly short ; cells narrowly rectangular-oblong to linear- 

 prosenchymatous, smooth ; alar cells forming a distinct group, 

 yellowish, incrassate, srnall, quadrate : seta long, drying 

 twisted, reddish to yellowish-red; capsule inclined to hori- 

 zontal, sub-cylindric, arcuate, annulate ; peristome normally 

 hypnoid; lid convex, acute to conic-obtuse; spores small. 



About Zi species in both dry and wet habitats, mainly 

 confined to the terpperate regions; about 20 spepies in Nortla 

 America ; 4 specie^ in pur region. 



Key to flic Sp,ecie^. 



a. Costa simple, thjjn, ending in about tjie middle of the leaf, or some- 

 what above the middle! c. 

 a. Costa none or very short. b. 



b. Stem slender, creeping; leaves finely serrulate all around; alar 



cells small, quadrate. 1. C. hispidulum. 



b. Stem usually erect; leaves entire; alar cells dilated, sub- 

 rectangular. 4. C. stellatum. 

 c. Leaves strongly squarrose; alar cells scarcely enlarged. 



2. C. chrysophyllnm. 

 c. Leaves spreading-erect; alar cells enlarged. 3. C. polygamum. 



