orangial
wall and forming a complicated network, the surface minutely warted or
spinulose. Spores globose, yellowish or flesh-color.

This genus differs from Arcyria in the capillitium springing from
numerous points of the sporangial wall.

1. LACHNOBOLUS GLOBOSUS, Schw. Sporangia globose, stipitate, pale
yellow, changing to clay-color; the wall thin and delicate, pellucid,
minutely granulose, the upper part torn away and soon disappearing, the
lower half more persistent. Stipe short, tapering upward, expanding at
the base into a small hypothallus. Capillitium arising from the lower
portion of the sporangium, forming a complicated network, the threads
3-5 mic. in thickness, the surface closely covered with minute warts.
Spores globose, pale yellow to clay-color in mass, 8-9 mic. in diameter.
See Plate I, Fig. 15.

Growing on the spines of Chestnut burs. Sporangia .5-.6 mm. in diameter,
the stipe shorter than the sporangium.

2. LACHNOBOLUS INCARNATUS, A. & S. Sporangia globose or ellipsoidal,
substipitate, closely crowded and seated on a common hypothallus; the
wall thin and delicate, pellucid, minutely granulose, dehiscing
irregularly. Stipe very short or often obsolete. Capillitium proceeding
from the inner surface of the sporangial wall, forming a complicated
network, the threads extremely variable in thickness, minutely warted
and spinulose. Spores globose, flesh-color in the mass, 8-9 mic. in
diameter.

Growing on old wood. Sporangia .5-.8 mm. in height, sessile on a narrow
base or with a very short stipe; the threads of the capillitium are
generally 3-5 mic. in thickness, but there are broader expansions at the
nodes and elsewhere. My specimens are from Prof. McBride, of Iowa. The
species is extremely variable, and these specimens differ much from
those described elsewhere.

II. ARCYRIA, Hill. Sporangia regular ovoid to cylindric, stipitate; the
wall a thin delicate membrane, circumscissile or torn away near the
base, the upper portion evanescent, the lower part persistent, small and
cup-shaped. Stipe more or less elongated, the interior containing
roundish vesicles which become smaller upward, and gradually pass into
the normal spores. Capillitium of slender tubules, issuing from the
interior of the stipe, forming a complicated network, without any free
extremities, the surface minutely warted or spinulose or with annular
ridges. Spores globose, red, brown, yellow, cinereous.

Sec.1. CLATHROIDES, Mich.