664 
MUSCI. (MOSSES.) 
shaped teeth ; the interior a membrane divided into 16 processes, 
with ciliolae interposed. Lid convex-beaked. Inflorescence mo¬ 
noecious or dioecious. (Name formed of av\a(, a furrow, and 
pviov, an ancient name for Moss.) 
1. A* lieterosticlllllll, Br. &. Sch. Leaves obovate-oval , 
strongly serrate, turned to one side , the nerve proceeding nearly to the 
summit; capsule cylindrical-oblong, slightly curved; lid obliquely 
beaked. (Arrhenopterum heterostichum, Schwcegr.) — Woods, shad¬ 
ed banks, &c. Monoecious : sterile fl. gemmiform, axillary. 
2. A. turgidum, Sehwa?gr. Leaves ovate-oblong , obtuse , en¬ 
tire^ nerve disappearing below the apex; capsule curved, somewhat 
gibbous. — White Mountains. Dioecious: sterile fl. discoid. 
3. A* palUStre, Schwsegr. Leaves elongated-lanceolate , dentic¬ 
ulate at the apex , nerve failing below the summit; capsule oblong, 
drooping.— Borders of swamps. Dioecious: sterile fl. discoid. Upper 
portions of stems often elongated, pedicel-like, nearly leafless and 
terminated by clusters of rudimentary leaves. 
38. TOIUIIA, Hedwig. Timmia. 
Calyptra cuculliform. Capsule oblong, annulate. Peristome 
double ; the exterior of 16 lanceolate geniculate-incurved teeth ; 
the interior a membrane divided nto 64 cilia adherent in fours at 
their apices. Lid hemispherical, slightly mamillate. Inflores¬ 
cence monoecious: sterile fl. gemmiform, axillary. (Named for 
Timm , a German botanist.) 
1* T. megapolitana, Hedw. Leaves elongated-lanceolate 
from a sheathing base, recurved, s»<ongly toothed, the nerve excur¬ 
rent; capsule oblique, almost horizontal. — Shady banks of water¬ 
courses. Calyptra often found detached from the capsule, and invo¬ 
lute on the pedicel. (T. cuculluta, Michx.) 
Pterogoniaceje. 
39. PTEROGONIUM, Swartz. Pterogonium. 
Calyptra cuculliform, smooth or hairy. Capsule lateral. Peris¬ 
tome double ; the exterior of 16 lanceolate teeth ; the interior a 
delicate membrane lining the inner face of the teeth, or divided 
into 16 free processes. Lid conic-beaked. Inflorescence monoe¬ 
cious : sterile fl. gemmiform, axillary. (Name formed of irrcpov, 
a toing, for axil, and yovy, sexes, from the axillary flowers of both 
kinds.) 
