OF WESTERN PENNSYLVANIA 20S 



upper sheathing, truncate, rounded, entire, or lacerate at the 

 apex: capsule rather small, sub-sessile, usually only the ros- 

 trate calyptra and the conic lid emergent from the sheathing 

 perichaetial leaves when mature, about 2:1, more or less turgid- 

 oblong ; lid reddish ; peristome usually a bright coral color, the 

 inner peristome united at the apex and sometimes well down 

 towards the middle into a perfect lattice-work, the bars in- 

 complete below; spores mature in summer. 



In cool streams and in ponds, on stones or on wood; 

 Europe, Asia, northern Africa, and from Canada through the 

 United States to Alabama. Scarce in our region. 



2. Fontinalis biformis Sullivant. 



Yellowish green to dirty green : stems long, much-branch- 

 ing : leaves of two kinds ; the vernal large, soft, lance-ovate, 

 concave, blunt to acute, when fresh and moist quite prominent- 

 ly three-ranked, and rather widely spreading; the summer 

 leaves much smaller, narrower, convolute and tubulose above, 

 rigid, covering the younger branches ; median leaf-cells of the 

 vernal leaves linear, the apical broadly rhomboidal, the angular 

 quadrate-oblong, much larger, forming small decurrent 

 auricles; costa none; archegonial clusters rare, situated to- 

 wards the base of the stems; antheridial clusters usually 2 

 to 4 together and long-stipitate : capsule oblong-oval, enfolded 

 by the perichaetial leaves ; lid conic, rostrate ; peristome-teeth 

 la,nce-linear, about 20-articulate, cilia tessellate and united at 

 the apex, papillose. 



In wood-land rivulets and streams ; from New England 

 to Florida and west to British Columbia, but not very com- 

 mon. Rare in our region. Portage County, Ohio, and : 



McKean : D. A. Burnett. (Porter's Catalogue). 



3. Fontinalis sullivantii Lindberg. 



(F. lescmii variety gracilescens Sullivant). 



Quite similar to F. lescurii but smaller and more slender: 

 very slender, regularly pinnate with remote and attenuate 

 branches ; leaves distant, the stem-leaves lanceolate, soft, narrowly 

 long-acuminate, somewhat concave, acute to somewhat 

 obtuse, entire or sub-denticulate, yellowish, about 

 5 mm. long; the branch-leaves about half as long, 

 more rigid, more concave, acuminate ; perichsetial leaves rather 

 short as compared with F. lescurii, not undulate at apex ; median 

 leaf-cells linear-flexuous, the apical shorter and broader, the basal 

 shorter and broader, the alar much larger, inilated-oblong : cap- 

 sules sessile, cylindric ; lid conic, long-acuminate ; peristome teeth 



