87 
ercaing: paraphyllia multiform ; stem leaves roundish, ovate- 
riangular, costa vanishing in the short acumen, scarcly plicate, 
aah be plane, erose-dentate below, serrate above; leaf-cells oblong- 
oo I ate to hexagonal (.009 mm.) unipapillate ; papillae s¢ouz, broad 
i ase, rarely bifurcate; branch leaves roundish, ovate-acuminate, 
acumen short, broad, sharply serrate. Monoicous; perichetial bracts 
oe. deeply plicate, margins denticulate-serrate; pedicel long, 
hp capsule oblong-cylindrical, inclined or horizontal, curved; 
us compound ; cilia 2-3, nodose or appendiculate; oper- 
culum conical, obtusely short-beaked; spores smooth .008-.012 mm; 
maturing in spring. (Plate 261.) 
| In open woods on the ground, about stumps and roots of trees; 
from Massachusetts to Wisconsin south to Mexico. New York 
(Howe, Pease); New Jersey (Austin, Best); North Carolina . 
(Small and Heller); Pennsylvania (James, Porter, Rau); Massa- 
chusetts (Faxon); Virginia (E. G. Britton, Small); Wisconsin 
(True). 
Type locality, Virginia, Bannister and Mitchell. 
Ittust. Dill. Hist. Musc. 282. pl. 36. f. 18. 1741. 
Exsic. S. & L. Musc. Bor. Am. ed. I, no. 278; ed. 2, no. 411, 
Aust. Musc. App. no. 299. 
9. THUIDIUM MICROPHYLLUM (Sw.). 
; Hypnum microphyllum Sw. Prod. 142. 1788. Muhl. Cat. 99. 
1813. 
Hypnum gracile Br. & Sch. Lond. Journ. Bot. 2: 668, name 
only. 1843. Mueller, Syn. Musc. 2: 488. 1851. 
Hypnum calyptratum Sull. Pac. R. Rep. 4: 190. pl. 70. 1856. 
Thuidium gracile Br. & Sch. Bryol. Eu. fase. 49-51. 1852. 
Schimper Syn. Muse. ed. 2, 611. 1876. | 
Thuidium pallens Lindb. Ms. 1864. 
Plants of medium size, flavescent to pale green, in spreading 
mats; stem 3 to 5 cm. long, creeping, pinnately branched ; 
branches simple, spreading, subcompressed ;_ paraphyllia multi- 
form; stem leaves broadly ovate to ovate-lanceolate, long and 
narrowly acuminate, biplicate, margins sinuate-serrvlate, rarely 
entire, plane or revolute, 
quadrate to short-rhomboidal, usually echlorophyllose, unipapillate ; 
papillae blunt; branch-leaves ovate-lanceolate, acuminate, the nar- — 
rowly oval apical cell unipapillate. Monoicous, 
€rect, serrulate or entire; pedicel flexuous-curved ; capsule oblong — 
costa subpercurrent; leaf-cells oblong- oe 
perichetial bracts _ : 
