174 American Midland Naturalist Monograph No. 6 



nate 3. F. Sultivanti 



D. Stem-leaves rather firm, more or less distinctly concave E 



D. Stem-leaves plane or nearly so, mostly distinctly flaccid F 



E. Leaves narrowly to oblong lanceolate, long-acuminate 4. F. dalecarlica 



E. Leaves ovate-lanceolate, apex usually denticulate, broadly obtuse or apiculate 



5. F. novae-angliae 



F. Alar cells enlarged, forming distinct auricles, and leaves clasping the stem 



10. F. Lescursi 



F. Leaves not clasping the stem G 



G. Majority of leaves 4-8 mm long by 0.5-1.5 mm wide, very long and narrowly acu- 

 minate; auricles distinct 7. F. flaccida 



G. Majority of leaves 2.4-5.5 mm long _ H 



H. Apex of leaf usually acuminate, long and narrow 6. F. hypnoides 



H. Apex of leaf usually shorter and broad i 



1. Leaf-auricles usually small but distinct 9. F. Duriaei 



I. Leaf-auricles none or quite indistinct 8. F. nitida 



1. Fontinalis antipyretica Linnaeus, Hedwig 



Leaves lance-ovate to lanceoval, 5-8 x 2-4 mm; median leaf-cells about 

 6-15:1; perichaetial leaves obtuse; peristome teeth papillose. — Apparently most- 

 ly represented in eastern United States by var. gigantea. 



1. Fontinalis antipyretica var. gigantea Sullivant 



[Fontinalis gigantea Sullivant) 

 Plate LXIV 



Floating, long, dark, brownish-green or golden green: stems denuded below, 

 slender, up to sometimes 6 or 8 dm. long, irregularly divided; the branches 

 turgidly three-cornered and sometimes 2 or 3 dm long; leaves deeply concave, 

 carinate, up to 6-8 mm long, 3-6 mm wide, broadly ovate or lance-ovate to 

 almost orbicular, entire, mostly broadly obtuse at the tip; median leaf-cells 

 about 7-11:1, linear-rhomboid and more or less vermicular, the apical and 

 basal shorter and wider, the alar sub-rectangular and somewhat inflated, form- 

 ing auricles which are convex upwards (adaxially) ; perichaetial leaves closely 

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

 apex: capsule rather small, sub-sessile, usually only the rostrate calyptra and 

 the conic lid emergent from the sheathing perichaetial leaves when mature, 

 about 2:1, m.ore or less turgid-oblong; lid reddish; peristome usually a bright 

 coral color, smoothish, the inner peristome united at the apex and sometimes 

 well down towards the middle into a lattice-work, the bars incomplete below; 

 spores mature in summer. 



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

 Canada through the northern United States to Alabama. Scarce and confined 

 to the mountains in our region. 



Blair Co.: T. P. James. (Porter's Catalogue). Cambria Co.: T. P. James. (Por- 

 ter's Catalogue). Cameron Co.: Submerged rocks in brook. Tannery School, Lumber 

 Twp., Sept. 1, 1935. S. K. Eastwood. Lycoming Co.: In spring. Bald Eagle Mt., 

 south of Williamsport, Feb. 15, 1949. Harry Roslund. McKean Co.: D.A.B. (Por- 

 ter's Catalogue). Somerset Co.: Glade Run Swamp, eastern border of county. June 28, 

 1942. O.E.J. Westmoreland Co.: Big Springs, west of Bakersville, Oct. 31, 1933. 

 C. M. Hepner (figured). 



