Macbr._

1796. _Trichia ovata_ Pers., _Obs. Myc._, I., p. 61, and II., p. 35.
1863. _Trichia abietina_ Wigand, _Pringsh. Jahr._, III., p. 33,
Tab. ii., Fig. 11.
1875. _Hemiarcyria wigandii_ Rost., _Mon._, p. 167.

Sporangia crowded or sometimes closely gregarious, sub-globose or
turbinate, shining yellow, sessile, the peridium thin, iridescent;
capillitium a tangle of sparingly branched yellow or ochraceous-yellow
threads, rather slender, 3-5 mu, marked by one or two prominent spiral
bands forming a loose somewhat irregular spiral, the free ends
not infrequent, inflated and rounded; spore-mass yellow or
yellow-ochraceous, spores by transmitted light pale yellow,
distinctly and sharply spinulose, but not netted, 10-11 mu.

A rare and beautiful species, distinguished well by the small size,
about .5 mm., by the thin iridescent peridium, as by the microscopic
characters of the capillitial threads.

There is no doubt that this is Persoon's _Trichia ovata_. His
description is accurate in all that pertains to external features, and
Rostafinski, _App._, p. 41, explicitly says that he _saw_ in Persoon's
herbarium specimens of the species bearing the name cited. Just why
Rostafinski did not here adopt the older name is not clear, nor is there
excuse for abandoning Wigand's name were Persoon's invalid. According to
Lister, _Trichia nana_ Mass., from Maine, is the same thing. Persoon,
_l. c._, gives a synonymy which, in the nature of case, is unverifiable,
the specific characters being microscopic.

Fries, _Syst. Myc._, III., p. 187, confirms Persoon and takes pains to
say that the color separates it from _T. chrysosperma_ with which it is
sometimes compared.

Rare. Maine, Massachusetts, New York, Ohio, Toronto.

4. HEMITRICHIA VESPARIUM (_Batsch_) _Macbr._

PLATE III., Figs. 2 and 2 _a_.

1786. _Lycoperdon vesparium_ Batsch, _Elench. Fung._, pp. 255, 256,
Fig. 172.
1794. _Trichia rubiformis_ Pers., _Roem. N. Bot. Mag._, I., p. 88.
1875. _Hemiarcyria rubiformis_ (Pers.) _Rost., Mon._, p. 262.

Sporangia clustered or crowded, rarely single, clavate or subcylindric
stipitate or sessile, dark wine-red or red-black in color, the peridium
in perfect specimens glossy or shining metallic, opaque; stipes solid,
usually blent together, concolorous; capillitium of intertwisted slender
threads, sparingly branched, marked by three or four spiral ridges,
abundantly spinulose, the free tips als