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Page number:72 
Remarks (internal):With data from only one collection area, it is impossible to determine which tree species are consistently associated with P. melaleucus. Harrison (1968) stated that the basidiocarps of P. melaleucus occur under conifers and Maas Geesteranus (1975) believed sporophores are found in mixed woods and under conifer stands. A type specimen for P. melaleucus was not designated, but the original description by Fries (1815) clearly indicates the species concept. The European specimens of Hydnum leptopus var. y graveolens and P. melaleucus f. violescens that Maas Geesteranus (1958) listed as synonyms of P. melaleucus, are identical to the species found in the southern Appalachian Mountains.
Phellodon melaleucus looks somewhat similar in growth form to P. confluens (concrescent and low to the ground), but enough macromorphological differences are present to facilitate easy identification. The basidiocarps of P. confluens are thicker (5.0 mm) and the colors are grayish to grayish brown in age. The context of P. melaleucus is thinner (2.0 mm) and the pileus is violet brown to olive brown or blackish in color. The stipe of P. melaleucus is very thin (0.3 cm) and often irregular, but is much larger and thicker (1.0 cm) in P. confluens.
Maas Geesteranus (1958) included additional synonyms not found in the above list, under P. melaleucus. No type specimens exist for these names and they were omitted here because of their uncertain identity. The names include Hydnum pullum Schaeff., Hydnum tomentosum var, atro-album Alb. & Schw., Calodon graveolens f. nigricans Bourd, and Galz., and Calodon graveolens f. ramosus Bourd. and Galz. Also, Maas Geesteranus (1971) considered Hydnum pygmaeum Yasuda as an additional synonym in a later publication, but I have not seen the type specimen, and the original description was unclear. Therefore, H. pygmaeum is also excluded from the list of synonyms.
Description type:Non-original description 
Description:Phellodon melaleucus (Fries:Fries) Karsten.
Sporophore single to gregarious or rarely concrescent.
Pileus up to 6.5 cm broad, plane to depressed, rarely umbilicate, tomentose, fibrillose, becoming matted, glabrous or shiny, scrupose to asperate or scrobiculate at the disc, radially rugulose to rugose, color zones present when fresh, soon disappearing after drying, concentric corrugations present, rarely with pileoli, white (7A1), reddish gray (7B2) to teak (6F5) or violet brown (lOF5) ("White", "Tilleul Buff" to "Bone Brown" or "Taupe Brown"), later olive brown (4D4) to hair brown (5E4) after drying; context up to 2.0 mm thick, not duplex, azonate or rarely zoned, reddish gray (l0B2) to grayish brown (9D3) or reddish brown (9E4) ("Pale Brownish Drab" to "Light Vinaceous Drab" or "Dark Vinaceous Drab"); taste mild; odor when fresh slightly fragrant, after drying becoming stronger. Stipe up to 4.5 x 0.3 cm, central, terete, flattened to subattenuate below with a thickened base, tomentose below, fibrillose or glabrous above, reddish brown (9E4) to violet brown (l0F4) ("Dark Vinaceous Drab" to "Blackish Brown"), later brown (6E5) ("Gray Brown") after drying; context not duplex, not obviously zonate, concolorous with pileus flesh. Spines are up to 2.0 mm long, decurrent, crowded, white (10A1) to reddish gray (l0B2) or grayish brown (l0D2) ("White" to "Pale Drab Gray" or "Smoke Gray"). Chemical reactions: context tissue dark olivaceous to blackish in ROH or NH4OH. Pileus trama hyphae up to 6.0 :m diam, uninflated, interwoven in subsurface layer; parallel below, unclamped; gloeoplerous-like hyphae up to 7.5 :m diam. Stipe hyphae up to 6.0 :m diam, uninflated, interwoven in subsurface layer, parallel at the center, unclamped; gloeoplerous-like hyphae up to 7.5 :m diam. Spine trama hyphae up to 4.0 (5.5) jim diam, uninflated, unclamped. Basidia up to 20.0-32.5 (40.0) x 4.5-6.0 (6.5) :m (X= 25.78"3.60 x 5.30"0.71 :m), clavate, unclamped, 4-spored; sterigmata up to 3.0-4.0 (4.5) :m long (X= 3.56"0.41 :m).
Basidiospores up to (3.0) 3.5-5.0 x 3.0-4.5 :m (X= 3.87"0.46 x 3.50"0.48 :m), subglobose to globose, hyaline; ornamentation echinulate, spinules not prominent; hilar appendage oblique.
Terphenylquinones: Thelephoric acid.
Distribution: occurs in eastern North America, Pacific northwest (Smith and Smith, 1973), and Europe (Maas Geesteranus, 1971); specimens examined: Georgia, North Carolina, Tennessee.
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