Summary:
Also listed in Crusts category. Sebacina lactescens is characterized by 1) firm-gelatinous fruitbodies, 2) stalked basidia, and 3) conspicuous golden to brownish yellow gloeocystidia, (McNabb 1966). Other features include 4) nearly colorless, dingy white, or pallid ochraceous color at first but when fully developed tinted greenish or olivaceous, 5) the fruitbodies originating as pustules and becoming smooth or convoluted, coalescing to form irregular areas up to 10cm long, 6) growth on hardwood and conifer bark and wood, 7) spores that are short-cylindric to broadly elliptic and often slightly curved, and 8) dikaryophyses. This is a common species on the west coast in early spring, (R. Bandoni, pers. comm.): it has usually been known as Ductifera sucina (Moeller) K. Wells. At least one of Moeller''s specimens of Exidia sucina was later found to be the same as Ductifera pululahuana (Pat.) Donk, and the earliest valid name for Ductifera sucina appears to be Sebacina lactescens Burt (K. Wells, pers. comm.). The description is derived from McNabb(10).
There are collections of this species (as Ductifera sucina or D. succina) from BC and WA at the University of British Columbia. The worldwide distribution includes CA, NC, NM, Panama, Jamaica, Windward Islands, Brazil, and Australia, (Klett(1)), and New Zealand (McNabb(10)).
Fruiting body:
"firm-gelatinous, determinate, originating as pustules, becoming smooth or convoluted", coalescing to form irregular areas up to 10cm long, in section 0.3-1.2cm thick "sordid hyaline, dingy white or pallid ochraceous when fresh, drying to an ochraceous brown, irregular film"; margins abrupt, (McNabb), arising as colorless pustules 0.05-0.2cm in diameter, becoming confluent to form a cerebriform [brain-like] to erumpent, somewhat convolute fruiting, waxy-gelatinous to firm waxy-gelatinous; white or gray to light ochraceous; margins free, determinate, (Klett), up to 0.035cm thick, waxy-gelatinous; grayish white when fresh, drying to a dark film, (Lowy), the gloeocystidia impart a greenish or olivaceous tint to fruitbodies when fully developed, but before that fruitbody is almost hyaline, (R. Bandoni, pers. comm.)
Microscopic:
spores 9.3-13(15.4) x 5-8.7 microns, short-cylindric to broadly elliptic, often slightly curved, colorless, apiculate, germination by repetition or by germ tubes; probasidia 18-31(37) x 8-13 microns, forming in groups on fertile hyphae, stalked, racket-shaped, with basal clamp connections, "becoming 2-celled by longitudinal or oblique septa or longitudinally cruciate-septate", sterigmata cylindric, up to 45 x 4.5 microns; dikaryophyses simple or irregularly branched apically, 1-3 microns wide, not or rarely arising from fertile hyphae; gloeocystidia 35-85 x 6-9(13) microns, "clavate, subclavate or subfusiform, occasionally irregular, arising below probasidia", at first colorless, contents becoming golden to brownish yellow, granular; ascending layer below hymenium composed of loosely interwoven hyphae 1.5-4.5 microns wide, distinct, colorless, clamp connections present; basal layer when present composed of hyphae lying parallel with substrate, compact, interwoven, distinct, colorless, (McNabb), spores (9)10-15 x (5)6-9 microns, inequilateral-elliptic, apiculate, germinating by repetition, usually guttulate; basidia formed in clusters on the fertile hyphae which are 1-2 microns wide, proliferating through conspicuous clamp connections at the base of the probasidia, the basidia "arising as elongate structures, becoming ovate, obovate to pyriform", 14-30(40) x (9)10-15 microns, "becoming 2-4-celled by longitudinal to oblique septa", epibasidia 3-4.5 microns wide; gloeocystidia not emergent, 30-80 x 5-16.5 microns, clavate to cylindric to subfusiform, at first colorless, "becoming yellow or brownish granular and flexuous"; dikaryophyses 1-3 microns wide, simple to little-branched, "becoming indistinct, rarely arising from the fertile hyphae"; hyphae 1.5-4.5 microns wide, thin-walled, smooth, with clamp connections; mineral crystals sometimes scattered throughout, (Klett), spores 10.5-14.5 x 8-9.5 microns, subcylindric, germinating by repetition; probasidia subclavate, metabasidia becoming ovoid, 4-celled with septa mostly oblique, 14.5-22.5 x 8.5-14 microns, sterigmata long-cylindric, up to 50 x 5 microns; gloeocystidia (55)70(80) x 12.5 microns, subclavate with brownish granular contents; hyphae with clamp connections, (Lowy)
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