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 Add this item to the list  828945 Original description
   
Remarks (public):A sister species of the newly described species L. olivaceorimosellus X.H. Wang et al. from northeastern China, from which it differs in the pileus hardly with olivaceous tinge, more globose spores and fewer pleuromacrocystidia (Shi et al. 2018). The two species can be regarded as two geographical populations in the same species complex. Species with areolate-rimose pileus together with the absence of rosettes in stipe cortex seem quite rare in north temperate but very diverse in subtropical and tropical Asia. In North American only L. thiersii Hesler & A.H. Sm., a species with much bigger reticulate spores belong to this group (Hesler & Smith 1979). In Asia additional representatives include at least L. furfuraceus X.H. Wang, L. gracilis Hongo, L. neglectus, L. squamulosus Z.S. Bi & T.H. Li and L. subgracilis described below (Wang 2007; Wang et al. 2018). Among these species, L. qinlingensis is quite distinct because of the spore ornamentation composed of wings and ridges arranged in a spiral or zebroid pattern. In Asia, such ornamentation is more often found in L. subg. Plinthogalus (Le et al. 2007; Stubbe et al. 2008; Stubbe & Verbeken 2012) and some species of L. subg. Lactarius (Heim & Perreau 1973; Verbeken & Horak 1999, 2000).
The ITS sequence KX444365 retrieved from GenBank is from a root tip sample of Q. liaotungensis, which confirms that L. qinlingensis a species growing with fagaceous trees. This sequence was tentatively named as L. olivaceorimosellus by Shi et al. (2018).
 
Description type:Original description 
Description:Basidiomata small-medium sized, slender. Pileus 15–35 mm diam., at first slightly convex to applanate, then becoming ± depressed, often with a persistent conical papilla; surface dry, strongly hygrophanous, areolate-rimose, color when young or wet blackish brown or dark brown, when dry or mature reddish brown, brown, ochraceous brown, very rarely with olivaceous tinge. Context 0.5–1 mm thick, cream-colored or subconcolorous with the lamellae. Lamellae 1–4 mm broad, medium crowded to rather distant, decurrent, sometimes forking, cream-colored when young, later light yellow (4A4), grayish yellow (4B44B5), pale reddish brown. Stipe 25–70 × 3–5 mm, equal, hollow; surface very smooth, orange brown, cinnamonmeus brown, reddish brown, brown, sometimes with concolorous hairs or tomentum at the base. Latex watery, unchanging and not staining. Spore print pale ochraceous.
Spores (80/4/3) (5.5) 6.5–7.3–8.0 (8.5) × (5.5) 6.5–6.9–7.5 μm [Q = 1.00–1.13 (1.16), Q = 1.06 ± 0.04] [holotype: (6.5) 7.0–7.4–8.0 × (6.0) 6.5–7.0–7.5 μm, Q = (1.00) 1.03–1.10 (1.14), Q = 1.06 ± 0.03], subglobose, rarely broadly ellipsoid; ornamentation 1.0–1.5 μm high, composed of medium dense to dense irregular sub-transparent ridges variable in size, rarely branched, often arranged in a spiral or zebroid pattern, never forming closed meshes, with numerous sub-transparent dots between ridges; plage inamyloid, rarely distally amyloid. Basidia 4-spored, 33–45 × 10–13 μm, clavate. Pleuromacrocystidia rare, negligible, base originating from the same depth as basidia, often only present near lamella edge, 25–35 × 5–7 μm, subfusiform, with a moniliform apex, with very sparse contents at the apex. Hymenophoral pseudocystidia rare to common, 2–5 μm broad, filiform, equal, with refractive contents. Lamella edge sterile, composed of basidioles-like marginal cells and cheilomacrocystidia; marginal cells 8–30 × 4–11 μm, clavate, ellipsoid, cylindrical; cheilomacrocystidia numerous, 20–35 × 5–8 μm, fusiform, with a mucronate or moniliform apex, with granular contents. Pileipellis an incontinuous epithelium or hyphoepithelium, more an cutis between piles of round cells when mature, 50–120 μm thick; cells of suprapellis inflated to 25 μm, globose, ellipsoid, hyphoid, yellowish brown; repent hyphae of the cutis hyphoid, rarely ellipsoid or sausage-shape, 6–15 (20) μm broad, yellowish brown; hyphae of subpellis 5–12 μm broad, colorless. Stipitipellis a cutis; of closely packed, predominantly longitudinally arranged hyphae; hyphae 4–15 μm broad, yellowish brown. Lactifers rare, colorless or pale yellowish brown. Trama of pileus and stipe lacking rosettes.
 
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