240 A MANUAL OF MOSSES 



3. Thelia lescurii Sullivant. 



Closely resembling T. asprclla but with the stouter stems 

 fasciculately branched, whitish or light glaucous-green in color : 

 leaves deltoid-ovate with a shorter acumen than in T. lescurii, 

 not so distinctly ciliate-fimbriate ; the papillae usually stellately 

 3- or 4-lobed ; the capsule relatively more slender and longer 

 and on a longer seta ; the teeth shorter and only sub-nodosely 

 articulate, the inner membrane longer and with short seg- 

 ments ; spores mature in fall. 



On flat rocks, ledges, or on dry, sandy soil ; from Xew 

 England to Missouri and the Gulf States. In Eastern Penn- 

 sylvania and may occur in our region. 



2. MYURBLLA Bryologia Europaea. 



Dioicous : slender, forming cushions or loose tufts, soft 

 (stiff when dry), light to bluish-green, dull to sub-lustrous: in 

 thick tufts the stems are upright, in loose tufts ascending, ir- 

 regularly bushy-branched with small-leaved stolons, basally 

 bushy-radiculose ; branches obtuse, sometimes apically flagel- 

 liform ; paraphyllia none ; leaves 5-seriate, more or less ap- 

 pressed-imbricate, round-ovate, obtuse to abruptly apiculate to 

 acuminate, spoon-shaped, marginally plane to involute, ser- 

 rate to dentate ; costa mostly very short and delicate, simple 

 or forked; sometimes costa none; median leaf-cells small, in- 

 crassate, elliptic, some rhomboid, at base short-rectangular to 

 quadrate, smooth or papillose by the thickening of the cell- 

 angles, rarely dorsally mamillate ; inner perichaetial leaves red- 

 brown, elongate-lanceolate, long-acuminate, plane-margined, 

 serrate, ecostate, with linear cells : seta 10-20 mm. long, thin, 

 drying twisted, red, smooth ; capsule erect, somewhat inclined 

 when empty, symmetric, oblong-oval, short-necked, yellow- 

 brown, finally constricted below the mouth ; annulus present ; 

 peristome-teeth basally confluent, lance-subulate, yellow or 

 pale, bordered by the broader dorsal layer, lamellae numerous ; 

 inner peristome finely papillose, hyaline to pale yellow, basal 

 membrane yellow, carinate, segments lance-subulate, same 

 length as teeth, cilia mostly shorter, filiform ; lid brightly 

 colored, conic, acute to obtuse ; calyptra fugaceous, small ; 

 spores small. 



A genus of six species occurring in Europe, Asia, and in 

 Xorth America ; one species in our region. 



1. Myurella gracilis (Weinmann) Lindberg. 



(M. carcyana Sullivant). 



Pale glaucous-green, loosely cespitose, interwoven with 

 long radicles below : stems slender, creeping to ascending, 

 stoloniferous, fasciculately branching; the branches julaceous; 



