DOI: 10.6084/m9.figshare.27173439.v1
title: Russula deodarae.fasRussula deodarae (Russulaceae, Russulales), a new species of sect. Ingratae from North-Western Himalaya, India, based on morphology, molecular data and scanning electron microscopy

description:   
Pileus medium to large sized, 32–112 mm in diam., hemispherical when young, then convex, planoconvex to applanate at maturity, broadly depressed at the center; margin incurved when young then gradually decurved to plane with age, strongly tuberculate striate; surface viscid when moist, glutinous; brown (6E4–5), light brown (6D4–5) when young, becoming orange grey (6B2), greyish brown, brown (6D–E3–4) to dark brown (6F5–7) at center then brownish grey (6C2) to orange grey (6B2) at margin with age. Lamellae adnate, subdistant (7–10 / cm at pileus margin), chalky white (1A1), unchanging or light brown (6D4–5) on maturity or injured, forked at stipe apex, middle or at margin; lamellulae less, present in 3 series. Stipe 40–85 × 12–25 mm, central, subcylindrical, subclavate to clavate with broader at base; surface dry, smooth, chalky white to yellowish white (1A1–2) becoming dingy after handling, blood red at base; turning salmon pink (6A4) and deep to dark turquoise (24E–F7–8) with FeSO4 and guaiacol respectively. Smell pleasant, slightly fruity. Taste mild. Spore print not obtained.
Basidiospores subglobose to broadly ellipsoid, 6.0–6.8–7.6 × 5.0–5.7–6.5 μm, Q= 1.06–1.16–1.29; ornamentation amyloid, composed of somewhat conical warts and ridges connected to give partial to incomplete reticulum; warts up to 0.9 μm high, suprahilar region inamyloid; apiculi up to 1.2 µm long. Basidia (35–)40–45(–48) × (9–)10–11(–12) μm, 4-spored, subclavate to narrowly clavate, narrow base; sterigmata up to 5 µm high. Hymenial cystidia near the lamellae sides (66–)74–84(–100) × (8.8–)9–11(–11.2) µm, cylindrical to subclavate with obtuse-rounded, subcapitate or appendiculate apices; partly or completely filled with finely crystalline content, without reacting in sulfovanillin (SV). Lamellae edges fertile with basidia and cystidia. Hymenial cystidia near the lamellae edges usually smaller and narrower, measuring (35–)38–50(–52) × (5.8–)6–8(–8.3) µm, cylindrical to subclavate with obtuse-rounded or mucronate apices; filled with finely crystalline content, without reacting in sulfovanillin (SV). Subhymenium layer up to 30 µm thick, pseudoparenchymatous. Hymenophoral trama mainly composed of large nests of sphaerocytes. Pileipellis orthochromatic in Cresyl blue, sharply delimited from the underlying sphaerocytes of the context, 380–400 μm thick, two-layered; vaguely divided in 90–120 μm thick suprapellis of relatively dense, composed of some erect or mostly decending hyphal terminations, arranged in a cutis and dispersed pileocystidia; subpellis 250–300 μm thick, composed of more or less dense, horizontally oriented hyphae. Hyphal terminations near the pileus margin often flexuous, thin-walled, composed of chain of 1–2 cells; terminal cells measuring (11–)15–23(–27) × (2–)2.8–3.2(–4) μm, mainly cylindrical, apically obtuse-rounded; subterminal cells cylindrical. Hyphal terminations near the pileus centre of similar structure, terminal cells slightly wider, measuring (17–)20–32(–35) × (2.8–)3–4(–4.5) cells mainly cylindrical. Pileocystidia near the pileus margin one-celled, flexuous, thin-walled; terminal cells (42–)50–62(–75) × (4–)4–4.5(–5) μm, cylindrical, apically mostly subcapitate, obtuse-rounded or mucronate; content finely crystalline, without reacting in sulfovanillin (SV). Pileocystidia near the pileus centre one-celled, thin-walled; slightly shorter terminal cells (28–)30–40(–42) × (3.2–)3.5–4(–4.5) μm, cylindrical, apically mucronate, capitate, subcapitate; content finely crystalline, without reacting in sulfovanillin (SV). Clamp connections absent from all tissues.