Lamproderma arcyrioides

Lamproderma arcyrioides* (Sommerf.) Rost. Monog. 206. 1874
Stcmonitis arcyrioides Sommerf. Mag. Naturvid. 7: 298. 1827.
Stemonitis violacea Fries, Syst. Myc. 3: 162. 1829. Not S. violacea Roth, 1788, nor S. violacea Schum. 1803.
Lamproderma violacea Rost.; Fuckel, Jahrb, Nass. Ver. Nat. 27-28: 69. 1873. Lamproderma nigrescens Sacc. Michelia 2: 262. 1881. Not L. nigrescens Rost. 1874. Lamproderma Saccardianum Massee, Monog. 101. 1892. Tilmadoche Berkeley i Massee, Monog. 332. 1892.
Sporangia globose or depressed-globose, 0.3-1 mm. in diameter, often umbilicate below, metallic blue or iridescent-purple, short-stipitate or sometimes sessile, gregarious or scattered, the total height 0.6-1.5 mm.; stalk, when present, usually rather stout, even, dark, short, rarely exceeding three-fifths of the total height; hypothallus a thin, continuous, reddish-brown membrane, or, when the sporangia are scattered, broken up into basal disks; columella black, cylindric or tapering slightly toward the apex, reaching the center of the sporangial cavity, the tip obtuse; capillitium lax, flaccid, flexuous, the threads branching and anastomosing to form a net loose at the center, denser toward the periphery, the threads pale brown as they leave the columella, becoming darker, then gradually paler toward the colorless tips; spores violaceous to purplish-gray by transmitted light, minutely warted, 8-11 p in diameter; Plasmodium waterywhite, rarely yellow.
Type locality: Norway.
Habitat: Dead wood, twigs, and leaves.
Distribution: Maine to Washington, south to Virginia and Colorado and in Puerto Rico; Europe; Tasmania.