280 A MANUAL OF MOSSES 



shorter than the segments and nodose ; lid high-convex, apicu- 

 late; spores small. 



A genus mainly confined to South America and embracine- 

 about 18 species; only 1 species occurs in North America and 

 this occurs rarely in our region. 



1. Sciaromium lescurii (Sullivant) Brotherus. 

 (Hypnum lescurii Sullivant; Amblystegium lescurii Jaeger). 

 (Plate XXXIX) 

 Loosely cespitose, dull, dark green to blackish-green: 

 stems closely and unequally branched, the branches as de- 

 scribed for the genus, but often with short branchlets, 1-1.5 

 cm. long, more or less erect, and pinnately disposed; leaves 

 of the stem thick, rather opaque, erect-spreading, entire below 

 to sub-serrulate all around, broadly ovate-cordate to oblong- 

 ovate, 1-1.3 mm. long, abruptly short-acuminate, the branch- 

 leaves similar but more lance-ovate; leaf-cells prosenchy- 

 matous, hexagonal to oblong, about 3-6:1, not much differenti- 

 ated except for the yellowish or castaneous border which is 

 composed of 4 or 5 rows of linear, prosenchymatous, flexuous, 

 highly incrassate cells, the border cells in the alar region be- 

 coming short and rectangular or obliquely quadrilateral ; costa 

 very strong, castaneous or yellowish, merging at apex into the 

 border : seta 1-3 cm. long, reddish ; capsule short-necked, the 

 urn about 2.5 mm. long, oblong, cernuous, somewhat arcuate; 

 the teeth confluent at base, hyaline-papillose above, yellowish 

 below, dorsally lamellate and cross-striate, numerously trabecu- 

 late, hyaline-margined; segments yellowish, carinately split 

 and about as long as the teeth, the basal membrane about two- 

 fifths as high; cilia 3 (or 4), pale, papillose, nearly as long as 

 segmetits ; annulus compound ; spores mature in late spring or 

 early summer, castaneous, medium-walled, smoothish, about 

 .012-.015 mm. 



On stones and rocks in streams, usually in mountainous 

 or hilly regions ; occurring from New England to Ontario and 

 Georgia. Rare in our region. 



Fayette : Ohio Pyle, May 30-31, 1908. O. E. J. (Fig- 



ured). 



6. DRBPANOCLADUS (C. Mueller) Roth. 



Dioicous, rarely autoicous: mostly robust, often densely 

 cespitose, green to yellowish or brownish, lustrous : stem 

 procumbent to erect, often floating, variously pinnate, the ends 

 of the shoots usually circinate; leaves usually more or less 

 circinate-secund, rarely erect to squarrose, more or less con- 

 cave, from a mostly narrowed and decui'rent base ovate- to 

 triangular- or cordate-lanceolate, acute to prolonged acuminate, 

 entire or serrulate; costa mostly simple and thin, ending usually 



