306 A MANUAL OF MOSSES 



closely interwoven ; stem-leaves crowded, lance-acuminate from 

 an ovate-oblong base, about 1x0.4—0.5 mm., falcate-secund, 

 slightly decurrent, serrate above, serrulate below, the margins 

 usually revolute ; median leaf-cells linear-rhomboidal to linear- 

 flexuous, about 8-12:1, shorter and more or less colored to- 

 wards the base, the alar cells quadrate, much incrassate, sub- 

 opaque; branch-leaves similar but proportionally much nar- 

 rower; paraphyllia small and few; costa double, short, yel- 

 lowish, or none ; inner perichsetial leaves long-acuminate, usual- 

 ly faintly bi-costate, apically serrate, strongly plicate : seta cas- 

 taneous, lustrous, about 1.5 cm. long, when dry dextrorse 

 above ; capsules about 2.5 mm. long, cylindric, yellowish, most- 

 ly abruptly arcuate just below the mouth so that the lid often 

 points at right angles to the direction assumed by the base of 

 the capsule, when dry the urn more or less wrinkled and nar- 

 rowed below the mouth ; lid yellow, rather large, high-convex, 

 narrowly obliquely rostrate; peristome hypnoid, the teeth 

 subulate-acuminate, orange-yellow and dorsally cross-striolate 

 at base, hyaline and papillose above ; segments about as long 

 as teeth, carinately cleft betwe.en the articulations ; cilia usual- 

 ly 2, articulate, slightly shorter than the segments; annulus 

 large, compound; spores rather strongly incrassate, yellow- 

 ish-brown, papillose, about .014-.017 mm., mature in mid- 

 summer.- 



On bases of trees, roots, logs, etc., in woods, especially in 

 spruce woods and mainly confined to hilly or mountainous 

 regions ; Europe, Asia, and from Canada south in the moun- 

 tains to North Carolina and in the West to Utah. Rare in our 

 region. 



McKean : Gates' Hollow, March 10, 1894, and July 



25, 1895, Marilla Brook, July 5, 1896, 

 Latshaw, August 25, 1895, and Bennett, 

 August 8, 1897. (Figured). All near 

 Bradford. D. A. B. 



2. Stereodon fertilis (Sendtner) Lindberg. 



(Hypnnm fertile Sendtner). 



(Plate XLV) 



Yellowish-green, lustrous, usually darker below, densely 

 interwoven : stems prostrate or ascending, from 3-10 cm. long, 

 scarcely branching, castaneous, densely and rather regularly, 

 complanately and somewhat plumosely pinnate with short 

 branchlets; stem-leaves 1.5-2.0 mm. long, concave, falcate- 

 secund, scarcely complanate, from an oblong-ovate base slen- 

 derly acuminate, the base sub-decurrent, sub-auriculate, some- 

 what excavate, the margin plane, entire below, serrulate above ; 

 costa usually bi-furcate or double, rarely none; branch-leaves 



