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Page number:26 
Remarks (public):P. ringens is closely related to P. violaceofulvus but has smaller spores, smaller basidia, lacks a cellular hymenopodium, and does not develop a venose hymenium between the lamellae. However, both species are purple to violet or violet tinted. P. ringens has been mistakenly identified as P. violaceofulvus (Batsch ex Fr.) Sing. by American authors and is discussed further by Miller (1967). The two collections cited by Coker (1944) were examined and both have the short spores and other characters of P. ringens. 
Description type:Non-original description 
Description:Panellus ringens (Fr.) Romagnesi. Bull. Soc. Mycol. Fr. 61: 38. 1945. Figs. 22-26, 36.
Lentinus ringens Fr. Epicr. Syst. Mycol. 396. 1836-38.
Panus salicinus Peck. N. Y. State Mus. Rep. 24: 77. 1872.
Panus ringens Fr. Hymen. Europe. 490. 1874.
Pileus (5-) 10-30 mm in diam., sessile, margin even to somewhat crenate, sometimes irregularly striate (see Fig. 36), light purple to purple drab or lilac colored with vinaceous tints ("purple-drab," "dark purple drab") fading in age sometimes to "vinaceous fawn" with a conspicuous pallid pubescence which is dense over the lateral attachment of the cap (Fig. 36) to the substrate; dried material is "vinaceous gray" to "lilac gray" at point of attachment. Lamellae radiating from the point of attachment, fawn to pink ("fawn color," "vinaceous-fawn" to "vinaceous-pink") often fading in age, reddish-brown when dried ("mikado brown" to "verona brown").
Spores (4.0-) 5.0-7.0 x 1.2-2.0 µm, oblong to allantoid, amyloid (blue in Melzer's solution), hyaline in KOH, often hard to find. Basidia 17-27 x (2.5-)3.5-6.3 µm, narrowly clavate, 4-spored. Pleurocystidia not found. Cheilocystidia 24-38 x 4.2-5.5 µm, clavate, cylindric, fusiform, thin-walled, hyaline in Melzer's solution and KOH, infrequent. Cuticle of pileus of single, tangled, or fasciculate thin- and thick-walled clamped hyphae 2.5-5.0 µm diam., hyaline to light yellowish in Melzer's solution and KOH. Trama of pileus and lamellae of interwoven, thick-walled and infrequent thin-walled hyphae 3.5-7.0 µm diam., light yellowish in Melzer's, hyaline in KOH. Subhymenium a thin layer of tightly interwoven hyphae 1.0-2.5 µm diam.
Habit, habitat, and distribution. - Several to gregarious, often lining the sides of sticks and limbs on the ground, sometimes nearly imbricate. Recorded on species of Alnus, Betula, and Salix in Europe and North America but in Europe it is also occasionally found on conifers. It is widespread in North America, from Maine to Idaho and north into Canada. Fruiting in late summer and fall but the persistent sporophores have been collected throughout the winter.
 
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