Common west to the Rocky Mountains, south to Mexico and Nicaragua.
2. Hemitrichia karstenii (Rost.) List.
- 1876. Hemiarcyria karstenii Rost., Mon., App., p. 41.
- 1891. Hemiarcyria obscura Rex, Proc. Phil. Acad., p. 395.
- 1894. Hemitrichia karstenii Lister, Mycetozoa, p. 178.
Fructification plasmodiocarpous, with a tendency to form distinct sessile, globose sporangia, color brownish red; capillitium a sparingly branched network, with free ends few, the thread marked by seven or eight faint spirals, the interspaces narrow, dull red in color, and 2.5 µ in diameter; spores yellow, delicately warted, 10–10.5 µ.
This is doubtless a very rare species. In the description we have followed Dr. Rex, l. c., as being more to the point for American forms. It is not improbable that the American material may after all be distinct, as discrepancies, if one may judge by descriptions, are not few. Lister, who had a slide from Dr. Rex, considers the European and American forms the same.
In outward appearing, plasmodiocarpous phases of this species very closely resemble forms of Licea or Ophiotheca, and are in consequence often wrongly labeled.
Toronto; Montana—Anderson. To be looked for north and west.
3. Hemitrichia ovata (Pers.) 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 µ, 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 µ.