148 American Midland Naturalist Monograph No. 6 



gether; always inserted back from the exothecium by the width of several cells, 

 peristome-teeth dagger-shape, golden brown to reddish-yellow, mostly non- 

 bordered, inner peristome mostly shorter, carinate, the basal membrane one- 

 fourth to one-half the height of the inner peristome; segments at first carinately 

 gaping, then divergently parted, cilia 1-3, rarely well-developed, sometimes 

 none, non-articulate; spore-sac very small; lid small, short-conic, rarely ros- 

 trate; calyptra small, cucullate, smooth, fugacious; spores large, round to oval 

 or reniform, papillose. 



A large family of nine genera; three genera in our region. 



Key to the Genera 



A. Cilia usually well-developed: stem with a whorl of sub-floral shoots 3. Philonotis 



A. Cilia poorly developed or none )i 



B. Leaf-cells mamillate or papillose; leaves 5-seriate or pluriseriate 2. Bartramtj 



L. Leaf-cells smooth; stem triangular and le.wes 3-seriate I. Plagiopus 



1. Plagiopus Bridel 



Synoicous: quite slender, laxly to densely cespitose, dull green, becoming 

 brownish: stem triangular, erect or ascending, the outer layer of cells lax, 

 hyaline, inflated, the central strand poorly defined, branching above the base, 

 the shoots of about equal height; leaves spreadina to recurved, somewhat, 

 twisted but not crispate when dry, from a non-sheathing base narrowly lance- 

 olate, acuminate, sharply carinate above, the margin usually revolute, doubly 

 serrate above; costa strong, percurrent, or shortly excurrent, dorsally projecting 

 and simply serrate upwards; leaf-cells incrassate, smooth, the upper minute, 

 shortly rectangular and quadrate, basally more elongate and pellucid, the alar 

 slightly more lax and quadrate: seta 1-L5 cm long, erect, castaneous, not twisted 

 when dry; capsule erect, somewhat inclined when dry, globose, slightly arcuate, 

 brown, finely striate, when dry somev/hat shortened at the base and mouth, 

 slightly curved and stronf^ly plicate; peristome double, the teeth smooth, nar- 

 rowly dagger-like, reddish-brown in the upper half, with inter-lamellar thicken- 

 ings, the inner peristome shorter and pale yellow, cilia none; lid small, short- 

 conic; spores mostly uniform, warty. 



A genus of three species: one in New Zealand, one in Java, and the 

 following: 



L Plagiopus Oederi [Gunnerus] Limpricht 



(Biyum Oederi Gunnerus; Bartramia Oederi Schwaegrichen; 

 Bartramia grandiftora Schwaegrichen) 



With characters essentially as given above for the genus. The spores 

 mature in spring. 



On moist soil and rocks in shady woods, mainly in non-calcareous and hilly 

 or mountainous districts; Europe, Asia, and, in North America, from Canada 

 to eastern Pennsylvania, Illinois, and west to the Rocky Mountains. It may 

 eventually be found in our region. 



2. Bartramia Hedwig 



Synoicous, paroicous, autoicous, or dioicous: slender to robust, laxly to 

 densely cespitose, the tufts often blue-green above, brownish-yellow inside: 



