The Green Helotium.
Æruginosum means verdigris-green. Gregarious or scattered, staining the wood on which they grow to a deep verdigris-green; ascophore at first turbinate and closed, then expanding, the margin usually wavy and more or less irregular; flexible, glabrous, even, somewhat contracted, and minutely wrinkled when dry; every part a deep verdigris-green, the disc often becoming paler with a tinge of tan color; 1–4 mm. across; stem 1–3 mm. long, expanding into the ascophore; hypothecium and excipulum formed of interlaced, hyaline hyphæ, 3–4µ. thick, these becoming stouter and colored green in the cortex; asci narrowly cylindric-clavate, apex slightly narrowed, 8-spored; spores irregularly 2-seriate, hyaline or with a slight tinge of green, very narrowly cylindric-fusiform, straight or curved, 10–14×2.5–3.5µ. 2-gutullate, or with several minute green oil globules; paraphyses slender, with a tinge of green at the tip. Massee.
Massee calls this Chlorosplenium æruginosum, De Not. It is quite common on oak branches, staining to a deep green the wood upon which it grows. It is widely distributed, specimens having been sent me from as far east as Massachusetts. The mycelium-stains in the wood are met more frequently than the fruit.
Bulgaria. Fr.
Bulgaria—probably first found in that principality.
Receptacle orbicular, then truncate, glutinous within, at first closed; hymenium even, persistent, smooth.
Bulgaria inquinans. Fr.
The Blackish Bulgaria.
