lly striate; in other specimens the
stipes are well differentiated, long, terete, with little or no
hypothallus.

_Badhamia curtisii_ (Berk.) Rost. is according to Lister (Mon., p. 35) a
sessile phase of this species. The only specimens known are in the
herbarium of Berkeley, now at Kew. The species is based upon a gathering
from S. Carolina. Berkeley thought it a didymium, called it _D.
curtisii_.

Reported from western Europe; the typical form abundant in the forested
regions of eastern N. America, especially in the Mississippi valley.

17. BADHAMIA SUBAQUILA _Macbr._

1899. _Badhamia subaquila_ Macbr., _N. A. S._, p. 64.

Sporangia closely gregarious or crowded, globose or sub-globose,
sessile, brown, the peridium a thin but persistent brown membrane,
rupturing above irregularly and remaining as a cup after spore
dispersal; hypothallus none; capillitium strongly developed, thoroughly
calcareous, the meshes large, the nodular thickenings broad, white;
spores globose, in mass black, by transmitted light brown, very
rough-warted, large, 15-18 mu.

The variety is founded on material sent from Maine by the late Mr. F. L.
Harvey. Professor Harvey, upon the authority of Mr. Morgan of Ohio,
quotes the species, _Bull. Tor. Bot. Club_, 24, 67, as _B. verna_
(Somm.) Rost. But the specimens certainly do not conform to description
of _B. verna_. Here the wall corresponds with what is seen in _B.
rubiginosa_; but the spores are much larger, and the capillitial
structure very different.

Miss Lister regards this a form of No. 16. So far, the original
gathering represents the species; but the woods of Maine are certain one
day to send added information.

Rare. On mossy logs, Maine.

=3. Physarum= (_Persoon_) _Rost._

1794.[19] _Physarum_ Pers., _Rom. Neu. Mag. f. d. Bot._, I., p. 88,
in part.
1795. _Physarum_ Pers., _Ust. Ann. Bot._, XV., p. 5, in part.
1801. _Physarum_ Pers., _Syn. Fung._, p. 168, in part.
1829. _Physarum_ (Pers.) Fries, _Syst. Myc._, II., p. 127, in part.
1875. _Physarum_ (Pers.) Rost., _Mon._, p. 93.

Sporangia plasmodiocarpous, aethalioid or distinct; the peridium usually
simple, sometimes double, irregularly dehiscent, more or less definitely
calcareous; capillitium a uniform irregular net, dilated and calcareous
at the nodes, adherent on all sides to the peridial wall.

This large and cosmopolitan genus is readily recognized by the
characters quoted. It may be a