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Page number:1123 
Remarks (public):It is not fully clear if what is here named Ph. lilascens is one species or a species complex. The differences in microstructures are too small to allow its separation in several taxa, but at the same time it is not convincingly uniform and there are good reasons to believe that more than one species is included. There are small differences esp. in the shape of the spores, caused by a greater variation in width than in length. Experience says that in the natural spore variation length is more variable than width. The variation in colour of the fruitbody is considerable but this characteristic is of less taxonomic importance. Bourdot found that his C. lilascens was restricted to deciduous wood while most of the Nordic specimens grow on conifer wood, esp. on pine. Without culture criteria we find it necessary to treat Ph. lilascens in our sense as one species. The material on which the conclusion is based is fairly comprehensive Nordic material, mostly from Sweden and Denmark, including the holotype collection of C. pallidoincarnatum Litsch., further the holotype (herb. Bourdot n. 5516) and 2 other authentic collections (herb. Bourdot n. 5515 and 18543) of C. lilascens. The species was also named C. serialis e.g. by Bourdot and Ph. serialis by Donk. This opinion is based on a fragment, sent by Bresadola to Bourdot, of a specimen, which should have been determined by E. Fries as C. seriale. However, there is no such specimen in herb. Fries (UPS) now, but three good specimens collected by Fries and determined by him as C. seriale, which belong to the species here described as Ph. serialis.
Another species name to consider is Corticium lacteolum Bourd., Soc. Sci. Bourb. p. 14, 1922. It has the same small spores and fibulate hyphae and could therefore be thought to belong to the Ph. lilascenscomplex. It differs, however, in having milk-white fruitbodies in the living state, and a different (looser) hyphal texture, with wider, when dried collapsed hyphae. Bourdot & Galzin didn't, consequently, place this species in sect. 9 Ceracea of Corticium but in sect. 6 Arescentia. Even if there are similarities in the dry material, we take for granted that this is a species of its own, distinguished from Ph. lilascens.
M.P. Christiansen reports Corticium lacteolum from Denmark and refers it to Phlebia. We have not seen any material collected by Christiansen, but judging from his description (Dansk bot. ark. 19:2
p. 167, 1960) his Ph. lacteola might rather belong to the Ph. deflectenscomplex in having thin-walled cystidia and no clamps. Specimens later collected by K. Hauerslev in Denmark and determined Ph. lacteola are as a rule Ph. lilascens in our opinion.
Ph. pallidolivens (Bourd. & Galz.) Parm., Eesti NSV Tead. Akad. Toim. XVI. Biol. 167:4 p. 391, was originally described as Corticium seriale ssp. pallidolivens Bourd. & Galz., Bull. Soc. Myc. France 27
p. 254, 1911. We have seen two specimens of this species, n. 5545 and 14125 in herb. Bourdot (P). The former specimen, from 1908, agrees with the protologue and is evidently a syntype. The latter, from 1910, deviates and is apparently conspecific with Ph. lilascens. The true C. pallidolivens is a species of its own. It has larger spores, reaching 9 x 4.5 urn, has a gelatinous hymenium and a thin but distinct subiculum, which extends beyond the hymenium and forms a whitish marginal zone. The species, which preferably grows on branches of pine, fallen or still attached, could possibly be found in N. Europe.
Two specimens, one collected by Eriksson in 1959 (n. 2949) and the other by Hjortstam in 1977 (n. 24719), both from SmÃ¥land (Värnamo, Moen, on coniferous wood) evidently represent a taxon of their own. The fruitbody has a yellow-ochraceous colour, brighter than in Ph. lilascens even in the wide sense here given it, and, which is more important, the spores are rounder and remarkably thin-walled (fig. 573).
Corticium pallido-virens Bourd. & Galz., Hym. de France p. 215, 1928, is another species which reminds of Ph. lilascens in several respects. In the description a difference in colour of the fruitbody and in the size of spores is reported, but the colour is an unreliable characteristic and the spore sizes overlap. We have studied one specimen (herb. Bourdot 35798), which is in poor condition with most spores collapsed, and from this specimen no definite conclusions can be drawn as to the taxonomic value of C. pallidovirens. It seems, however, to be close to Ph. lilascens.
Litschauer collected in the year 1920-27 a species which he after correspondence with Bourdot published as Corticium pallido-virens Bourd. & Litsch. in Litsch., Osten.. bot. Zeitschr. 77 p. 123, 1928. In the Vienna herbarium there are 5 specimens from two localities. One of them is a syntype (W.n. 16376), two are isosyntypes of the same. The two remaining specimens are collected in the syntype locality Ruetztal. These specimens shows that C. pallido-virens Bourd. & Litsch. is not con-specific with C. pallido-virens Bourd. & Galz. They are homonyms, but not synonyms, and as C. pallido-virens Bourd. & Galz. seems to be first published, the species described by Litschauer should get a new name, with the cited syntype as type.
Being a non-fibulate species its generic place is a problem, but just like the non-fibulate Phlebia deflectens it is in the present taxonomical situation best placed in Phlebia s.l.
According to Bourdot & Galzin (l.c.) Litschauer had in their correspondence suggested the species name Corticium viride-salebrosum for his species, and this name is herewith validated:
Phlebia viride-salebrosum Erikss. & Hjortst. nom. nov.- Corticium pallido-virens Bourd. & Litsch.-non C. pallido-virens Bourd. & Galz. Protologue: Litschauer, l.c.
Lectotype: Australia, Tirol, small forest near Stams in Oberinntal, on decayed, fallen branches of Corylus avellana and Alnus incana, 1926.06. 06., V. Litschauer 16376 (W). Besides in W two isotypes.
Paratypes: Austria, Tirol, Rueztal near Ruezwerk, Stubai, on dry branches of Alnus incana, 1927.07.15. V. Litschauer 15285 (W); d:o, Ruezbachschlucht near Ruezwerk, on decayed twigs of Alnus incana and Corylus avellana, 1923.09.09, V. Litschauer 41507 (W).
 
Description type:Non-original description 
Description:Phlebia lilascens (Bourd.) Erikss. & Hjortst. n. comb. - Corticium lilascens Bourd., Rev. Sci. Bourb. 23 p. 13, 1910. - Corticium pallidoincarnatum Litsch., Ann. mycol. 39 p. 123, 1941. - Phlebia pallidoincarnata (Litsch.) Parm., Eesti NSV Tead. Akad. Toim. XVI. Biol. 1967:4 p. 391. - Corticium seriale s. Bourd., Hym. de France p. 219, 1928. Non Corticium seriale Fr. s. str.
Fruitbody resupinate, closely adnate, effuse, 0.1-0.4 mm thick, ceraceous in the living state, crustaceous when dried; hymenium smooth-tuberculate, with age and growth circumstances varying in colour: sordid yellow, often a shade of rose or violaceous, pale ochraceous, pale brown; margin indeterminate.
Hyphal system monomitic; hyphae thin-walled, with clamps, 2-3 um wide, those next to the substrate sometimes wider, to 4 or 5 um; all hyphae joined into a dense, conglutinate tissue in which the hyphal elements are discerned with difficulty, esp. in the herbarium material; old specimens with a yellow resinous encrustation, rarely turning reddish in KOH.
Cystidia none.
Basidia narrowly clavate, 25-28 x 4-5 µm, with 4 sterigmata and basal clamp.
Spores 4-4.5 x 2-2.5,m, narrowly ellipsoid, thin-walled, smooth, non-amyloid, non-cyanophilous.
Habitat. On decayed coniferous and deciduous wood, mostly decorticate, but found also on bark. Biotope varying from Hylocomium-Vaccinium-Pinus-Picea forests to herb-rich deciduous forests.
Distribution. Collected in all the Scandinavian countries and is at least locally fairly frequent. In Sweden there are collections from SmÀ¥land to À…ngermanland, most of them from Västergötland. It has been found several times in Denmark (Sjaelland) but there are only few collections from Norway and Finland. From outside Scandinavia we have seen material from Spain, C. France, Poland and Carpatorossia.
 
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