ina_ Lister, _Mycetozoa_, p. 30.
1911. _Badhamia capsulifera_ Lister, _Mycetozoa, 2nd ed._, p. 31.

Sporangia clustered or gregarious, sessile or sometimes stipitate,
globose or obovoid, gray or greenish white, snow-white when empty; the
peridium thin, translucent; the stipe, when present, as in _B.
utricularis_, although generally shorter and better developed, yellow or
straw colored; capillitium a very loose, open network of white,
lime-filled tubules, not much expanded at the nodes; columella none;
spore-mass purplish-brown; spores adhering in clusters of five or six to
twenty or more, globose, but affected somewhat by mutual pressure, rough
throughout, the exposed surface in the cluster, more distinctly warted,
10-12 mu.

This is _Badhamia hyalina_ (Pers.) Berk., Rost., _Mon._, p. 139; but
Rostafinski himself admits that the two species, here united, as he
defined them, are very much alike, having "the same spores and
capillitium", differing in the form of the sporangium, an inconstant
feature. Bulliard's name has precedence; his descriptions of this and
the preceding species are remarkable.

The peculiarly adherent spores distinguish the species from _B.
utricularis_; and the sporangia sessile or with short but strand-like
stipes, distinguish it from _B. papaveracea_.

The description above is for the typical European form. Lister expresses
doubt whether this occurs in the United States. The form from Iowa which
is the basis for the inclusion of the species in N. A. S. is, we
believe, nothing else than _B. capsulifera_ (Bull.) Berk. The form
approaches _B. populina_ as this is presented in Colorado. The Iowa
specimens are white, aggregate, superimposed, etc., but have the
capillitium and spores exactly as described for the type. Accordingly
_B. populina_ as this occurs in Colorado has been for years referred to
the Berkeley species. The thicker more strongly calcareous peridia
constitute, as would appear, the principal difference in the forms from
Colorado. See next species.

13. BADHAMIA POPULINA _List._

1904. _Badhamia populina_ List. _Jour. Bot._, XLII., p. 129.
1911. _Badhamia populina_ List. _Mycetozoa, 2nd ed._, p. 32.

Plasmodium white; sporangia sessile, crowded, heaped, large, 1.5 mm.,
rarely stipitate, globose or ovoid, white; stipe when present brown;
capillitial strands broad, calcareous; spores clustered, 16-20 in a
cluster, purple-brown, roughened and sometimes marked by obscure ridg