141 
rate; stem leaves larger, proportionately broader, entire: monoi- 
cous; male branches small; antheridia few, subcylindric; inner 
perigonial leaves ovate, acute, ecostate, bordered by a row of nar- 
row cells : perichaetium 1.5—2 mm. long, sheathing ; inner leaves 
oblong-lanceolate, very gradually acuminate, entire, slightly bicos- 
tate; leaf cells linear above, rhomboidal below. Sporophyte 
12-15 mm. high; seta light reddish-brown; capsule brown, 
elongated-ovoid, contracted below mouth, 2.5 mm. long, 4: 1; oper- 
culum conic-rostrate, with a slender inclined beak; annulus com- 
pound, persistent, of 3 rows of cells ; peristome about 0.3—0.4 mm. 
long ; teeth narrowly linear-lanceolate, closely and regularly arti- 
culate, densely and minutely papillose; segments linear, shorter 
than the teeth, usually broken off, minutely papillose ; spores very 
minutely roughened, 11-13, maturing in autumn. 
Type locality, Lancaster, Penn. (Muhlenberg). 
On earth and rotten logs in the shade, roots of trees near 
water courses. 
Rhode Island, New Jersey, Ohio, Illinois, Kansas, Nebraska, 
Missouri. Not common. 
ILLUsTRATIONS.—Hedw. 1. c.; Sull. Icon. Musc. AX. 93. 
Exsiccati.—Sull. and Lesq. Musc. Bor. Am. (Ed. 1) 264, 
(Ed. 2) 388 in part, mixed with Æ. seductrix minor. 
Easily distinguished by its short ovoid capsules and long 
minutely papillose peristome. 
4. EnTopon SuLLIvaNTI C. Muell. Can. Rec. Sci. 1894: 21. 
1894. 
Neckera Sulltvantii C. Muell. Syn. Musc. 2: 65. 1851. 
Cylindrothecium | Sullivantii Sull. in A. Gray, Man. Ed. 2: 
664. 1856. Also Icon. Musc. 149. X. 95. 
Gametophyte in rather thin, glossy-green mats; stems 3—5 cm. 
long, pinnately branching ; stem and branches slender, complanate- 
foliate, lying in the same plane ; branches 5-15 mm. long ; branch 
leaves ovate-lanceolate, 1.1 by 0.4 mm., acute, serrate at apex, 
very concave, margins incurved ; costa short and double; med- 
ian cells linear-rhomboidal, 8:1; quadrate alar cells numerous, 
extending nearly or quite to costa at base; stem leaves much 
larger, 1.6 mm. long, broadly ovate-lanceolate, entire except at ex- 
