140 A MANUAL OF MOSSES 



A'IcKean : Bennett Brook, on decaying log, D,ecem- 



ber 2, 1894, and at Quintuple, June IS 

 1896. D. A. B. 



2. WEBBRA Hedwig. 



{Pohlia Hedwig). 



Mostly paroicous or dioicous : paraphyses mostly present 

 and filiform : robust to weak, gregarious or cespitose : stem 

 mostly red; leaves more or less tufted on the fertile shoots, 

 linear-lanceolate to l^inceolate, non-bordered, towards apex 

 more or less toothed ; costa mostly incomplete ; cells narrowly 

 rhomboid-hexagonal to linear, the basal' slightly more lax: 

 seta long, slender, tortuous and twisted, at apex hooked or 

 curved ; capsule cernuous or pendulous, rarely erect;, with short 

 cqllum, obovate to obl?inceolate or long-clavate ; aimulus 

 iPiOstly biseriate; peristome inserted near the moytU; teeth 

 yellowish, papillose, witl|i border uarrow or none ; segments 

 mostly about as long, rarely rudimentary, often with a low 

 ^);a,s9.rmembrane, often narrow, usually split but not fenestrate, 

 cilia n.o,h-append|iculate, often rudimentairy or lacking; spores 

 njostly small ; operculum convex-conic, umbonate or apiculate. 



A world-wide, genus of about 140 species, inhabiting soil, 

 rocks, and decaying wood. Forty-six species in North 

 America; at least 5 species in our raqge. 



Key to the Species. 



a. Leaf-cells very narrow: inner peristome with a low basal raera- 

 orane, complete narrow segments, and cilia 6hen rudimentary br 

 none. ' b. 



a. Leaf-cells narrow: basal membrane comprising one-third to one- 

 half the height of the inner peristome; segments split, cilia well 

 developed. c. 



b. iParoicous; capsule long and slender with a long slender coUum. 



I. W. elon-gata. 

 b. Polyoicous; capsule oblong to pyriform with a rather short 

 collum. 2. W. cruda. 



c. Paroicous; not bearing gemmae: costa hardly reaching the serrate 



3pex. d. 



c. Dioicous; often bearing gemmse: costa incomplete or percurrent 



e. 

 d. Cilia two, not sub-appendiculate, articulate. 



3. W. nutans. 

 d. Cilia three, distinctly sub-appendiculate. 



ia. W. nutans var. tn- 

 ciliata. 

 i. Costa not reaching apex: cajpsule small and very short ; stem net 



reddish. 4. TV- lescuriana. 



e. Costa percurrent: capsule larger and not so relatively short; S'cm 

 reddish. f. 



f. Gemmje ovoid, obfuse or with short and not twisted points. 



5. W. onnotina. 



i. Gemmse long, narrow, with acurninate and often twisted points. 



6. W^. proUgera. 



