— II — 
strongly papillose, opaque, 7-8// in diameter. Costa 6o/z thick at base. 
Perichaetial leaves larger, hyaline in the lower ^-^ 4 , more narrowly acum- 
inate, margins about as much revolute above. Seta pale red, about io mm. 
long. Capsule erect, subcylindric, with operculum about 2 by 0.44 mm., 
operculum conic, rather short, .05 mm. long. Calyptra covering yi the cap- 
sule. Peristome 0.35 mm. high, purple, basal membrane short, teeth little 
twisted, divided to the base into two filiform divisions, papillose, divisions 
usually united below by two or three trabeculae. Spores smooth, variable, 
globose or elliptic, 20-30// in diameter. Seemingly dioicous (antheridial 
buds unknown). Plate XVII. 
Missouri: Courtney, on wet rocks (B. F. Bush, 1898). 
Much resembling Barbula unguiculata Hedw. by the habit and the 
shape and areolation of the leaves, but readily distinguished from it by the 
peculiar structure of the peristome, which is hardly twisted, and by the 
spores twice larger. C. Mueller describes a B. cancejlcita, the peristome of 
which according to the description must have a similar structure to that of 
our D. Bushii, but the teeth are smooth (likely twisted) and the lid is as 
long as the capsule. 
Desmatodon systilioides Ren. & Card. 
This is not a Desmatodon but a new Pottia of the group Heimii. 
Barbula macrotricha Card. & Ther. 
Tufts compact, hoary above. Stems short, 1-2 mm. long. Leaves 
erect when moist, appressed into a bud-like shape, twisted when dry, 
1-1.5 mm., by 0.6-0. 8 mm. ovate or short subspatulate, apex broadly obtuse, 
often emarginate especially in the lower leaves, broken when old, margins 
entire, plane at base, above this revolute to near the apex. Costa narrow, 
4-8// thick, excurrent into a smooth hyaline hair which is short in the lower 
leaves but equalling the rest of the leaf in the upper leaves. Lower leaf 
cells quadrate or short rectangular, 18// broad, hyaline or slightly chloro- 
phyllose, nearly smooth, the other cells smaller, about 12// broad, quadrate 
or subrotund, strongly chlorophyllose and highly papillose, therefore indis- 
tinct. Seta reddish at base, above pale, 6-8 mm. long, Capsule erect, sub- 
cylindric, somewhat curved, 2.5 mm. long, including the elongated conic 
operculum. No mature capsules known. Seemingly dioicous as antherial 
plants were not seen on fruiting plants. Plate XVIII. 
California: Soldier’s Home, Los Angeles Co. (Dr. Hasse, 1902; herb. 
C. F. Baker). 
In general appearance resembling the smallest forms of B. muralis 
Timm., from which it differers by the smaller size, the short pedicel, the 
much shorter leaves obtuse or emarginate and finally eroded at the apex, 
the hair of the upper leaves as long as or even longer than the lamina, etc. 
(To be continued.) 
