Jennings: Manual of Mosses— 22. Polytrichaceae 167 



cells in the lamina at the middle of the leaf in 4-9 rows, thick-walled, rounded- 

 quadrate, .009-,014 mm in diameter, the lamina above the sheathing base in- 

 creasingly serrulate with one-celled somewhat spreading teeth; costa at base 

 about one-fourth the width of the leaf, narrowing slenderly above into a sharply 

 serrulate, red, awl-like point about .007-. 010 mm long; lamellae numerous, 

 4-6 cells high, the cells equal in size, smooth, rounded, about .014-. 015 mm in 

 diameter, the terminal one slightly obtusely pointed: seta erect, slender, 4-6 cm 

 long, pale yellowish-red; capsule more or less horizontal, ovoid-cylindric, 4-5 

 mm long and half as thick, rather irregularly obtusely 4-6-angled, considerably 

 shrunken and wrinkled when dry, the apophysis about half as wide as the 

 capsule and only moderately developed; calyptra reddish-brown, about covering 

 the capsule; operculum low-hemispheric, long-rostrate; peristome teeth 64, pale 

 yellowish-red, with a median darker line and several indistinct, longitudinally 

 parallel atriae: capsule wall of thick, irregularly rectangular or rounded-hexag- 

 onal cells .035-.040 mm in diam.eter; spores oreenish-yellow, thin-walled, faintly 

 warty, .018-.020 mm in diameter, mature in early summer. 



Widely distributed in bogs, heaths, and boggy woods, northern Eurasia 

 and North America; New Zealand. 



Our only collection made by Charles M. Boardman, July 15, 1949, in Mt. Davis bog, 

 Somerset Co., Pa., altitude 2400 feet (figured). 



2. PoYYTRlCHUM OHIOENSE Renaud and Cardot 

 Ohio Hair-Cap Moss 



Plate XXXII 



Erect, loosely cespitose, about 2.5-7 cm high (gametophyte), olive-green: 

 stems wiry, slightly or not at all tomentose below, chestnut-brown; leaves 

 widely spreading when moist, erect-appressed when dry, or with the tips flexu- 

 ous-spreading, lower leaves small and linear, the upper about 8-12 mm long, the 

 linear-lanceolate limb spreading from an oblong sheathing base about 2-3 mm 

 long, the limb serrate and ending in a spinulose, stiff, pellucid acumen, very 

 strongly costate, the costa with about 40-50 lamellae; lamellae 4-6 cells high, 

 the terminal cell wider but not longer and not bi-cuspidate or retuse; cells in 

 alar portion of sheathing base of leaf elongate-rectangular, about .010-.015 x 

 .100-. 130 mm, prosenchymatous or parenchymatous, in middle of sheathing 

 base narrower and proportionally longer, somewhat incrassate, in limb rounded, 

 incrassate and pellucid-opaque; perichaetial bracts similar but with a longer 

 more hyaline sheathing base and a narrower hmb: seta 4-8 cm long, wiry, 

 fle.xuous, lustrous, chestnut-brown shading to golden above, erect; capsule erect 

 soon becoming more or less horizontal, acutely 4- (5) angled, narrowed 

 towards the base, about 2-3 by 4-6 mm, yellowish-brown, hypophysis small but 

 distinct; peristome-teeth pale yellow with a darker median portion, about 

 0.2-02.5 mm long; spores round, smooth, .015-. 017 mm, mature in midsummer; 

 cells of exothecium about .007-.010 by .010. 015 mm, quadrate to hexagonal, 

 incrassate, non-p>orose; operculum with a rostrum about equal in length to the 

 diameter of the capsule; calyptra yellowish, exceeding the capsule. 



