e, white, strongly nodulose;
spore-mass black; spores dark, violaceous-brown by transmitted light,
distinctly warted, or reticulate, the reticulations resembling somewhat
those of some of the trichias, as _T. affinis_, 10-15 mu.

Easily recognizable, generally at sight, by its peculiar color. White
forms, however, occur; often lilac-tinted and white from the same
plasmodium. A perfectly white colony seems to be rare. Both colors are
shown in specimens distributed. _N. A. F._, 2494.

Common eastward, Ontario, New England, Pennsylvania, Ohio, etc. Not
reported west of the Mississippi River.

Whatever the color, the spores are in every case positively diagnostic.
The episporic markings are unlike those of any other species in the
present order. Dr. Rex describes some New York forms as provided with a
short but distinct stipe. Such forms resemble externally _Scyphium
rubiginosum_ (Chev.) Rost. The hypothallus is also unique. V. next
species.

16. BADHAMIA RUBIGINOSA (_Chev._) _Rost._

PLATE X., Figs. 1, 1_a_, 1_b_, 1_c_.

1826. _Physarum rubiginosum_ Chev., _Fl. Par._, p. 338.
1872. _Craterium obovatum_ Peck, _Rep. N. Y. Mus._, XXVI., p. 75.
1875. _Scyphium rubiginosum_ (Chev.) Rost., _Mon._, p. 148.
1876. _Badhamia rubiginosa_ (Chev.) Rost., _Mon. App._, p. 5.
1892. _Craterium rubiginosum_ Massee, _Mon._, p. 270.

Sporangia gregarious, obovoid, grayish brown, stipitate, the peridium
simple, membranous, above thin, pale, more or less calcareous below,
more persistent blending with the stipe; stipe erect, reddish brown or
purplish, expanded below into a small hypothallus, above, prolonged
within the sporangia more than half its height as a definite columella;
capillitium very dense, snow white, long persistent with the lower
two-thirds of the sporangial wall; spore-mass dark brown; spores by
transmitted light, dark violet or purple-brown, minutely roughened or
spinulose, not adherent, 12-14 mu.

This is probably the most common badhamia in the country and in the
world. It is found every year, in the woods, on masses of decaying
leaves, especially those of various species of oak. The plasmodium is
yellow. The fructifications are very distinct, not likely to be
mistaken for those of any other species; the stipes constitute a very
prominent feature in every gathering I have seen. Sometimes these are
more or less coalescent, especially toward the base, where they are apt
to be also wrinkled or longitudina