Hygrophorus deliciosus C.Q. Wang & T.H. Li, 2020
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publication ID |
https://doi.org/ 10.11646/phytotaxa.449.3.3 |
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persistent identifier |
https://treatment.plazi.org/id/3F40497B-FF96-FFBB-FF3B-F9AE2F02CA2E |
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treatment provided by |
Felipe |
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scientific name |
Hygrophorus deliciosus C.Q. Wang & T.H. Li |
| status |
sp. nov. |
Hygrophorus deliciosus C.Q. Wang & T.H. Li View in CoL , sp. nov. ( Figs. 2–3 View FIGURE 2 View FIGURE 3 )
Fungal Names: FN570710
Diagnosis:— Hygrophorus deliciosus differs from H. russula in its obvious pileus scales, broader and more fragile lamellae, pinkish white lamellae and pink to reddish discoloration of lamellar edge, white context, larger basidiospores, and the subalpine distribution in southwest China.
Etymology:— deliciosus (lat.) means delicious, referring to the good edibility of the new species.
Typification:— Yunnan Province: Chuxing City, Nanhua County, Nanhua Wild Fungus Market, 16 October 2019, Chao-Qun Wang 457 (GDGM79208, Holotype).
Description:— Pileus 4–14 cm, hemispherical to convex when young, becoming broadly convex, plane, planoconcave to concave, shallowly depressed when mature, usually slightly subumbonate at flat disc, pale red (10A3), pastel pink (10A4–5), brownish red (10C7), to violet brown (10E8), darker at center, paler towards the margin, pinkish white (10A2) at margin of some young pileus, with a more or less brownish red tint (10D8) when injured, densely scaly at center and more sparsely towards the margin, slimy or somehow sticky when fresh and wet, with an easily removed pileus epiderm; margin inrolled and entire when young, gradually extended, usually unrolling and often lacerated when old. Context up to 2.4 cm thick, fleshy, white to with flush of pinkish, unchanging when exposed or injured, white in exsiccata. Lamellae adnate to shortly decurrent or arcuate, up to 1 cm broad, subdistant, white at first, becoming pinkish white (10A2) with age, usually discoloring to pale red (10A3) even to brownish red (10D7) at edge when touched, waxy, thick, fragile, often cracking or notched at edge, with 1–3 unequal lamellulae between two entire lamellae; lamellar edge usually darker pink. Stipe 4–12 cm long, 1–2.2 cm thick, central to slightly eccentric, cylindrical, usually equal, occasionally enlarged and rarely tapering at the base, white to pinkish white (10A2) at first, pale white (10A3) with red (10A7) to brownish red (10D7) tint when mature, usually paler than the pileus, discoloring slightly when touched or damaged, longitudinally fibrillose, solid and fleshy inside. Taste mild, not distinctive. Odor indistinctive.
Basidiospores (6.5)7–9(10) × 4.5–6(6.5) μm, Lm = 7.84 ± 0.8, Wm = 5.16 ± 0.44, Q = (1.2)1.3–1.8(1.9), Qm = 1.52 ± 0.17, ellipsoid to oblong, hyaline, smooth, thin-walled. Basidia mainly 4-spored, rarely 2-spored, (49)50– 61(72) × (5.5)6–8 μm, Q = (6.3)7–9.4(9.8), Qm = 8.24 ± 0.87, slenderly clavate; sterigmata up to 7 μm long, rarely to 11 μm long. Pileipellis an ixotrichoderm; hyphae cells 3–5 μm broad with terminal cells 30–120 μm long. Stipipellis a cutis, made up of repent hyphae 3–5 μm broad, with scattered ascending or upturned terminal elements. Lamellar trama divergent, thin-walled hyphae, with elements 4–22 μm in width and usually less than 100 μm in length, rarely thick-walled brownish refractive hyphae measuring 4–5 μm broad. Clamp connections present.
Known distribution:—Known to occur in the subalpine regions at high elevations (usually above elev. 3000 m) in Sichuan, Tibet, and Yunnan of southwestern China.
Habit and habitat:—Scattered to gregarious on soil in forests dominated by Quercus aquifolioides , sometimes in fairy rings or arcs, from August to October.
Additional specimens examined:— CHINA. Sichuan Province: Aba prefecture, Xiaojin County, Jiajinshan, 30°59′N, 102°21′E, elev. ca. 3300 m, Wei-Lai Lu (HMAS268522); Panzhihua City, Yanbian County, Gesala Eco- Tourism Area, 27°16′N, 101°26′E, elev. ca. 3100 m, 24 August 2013, Chao-Qun Wang & Ming Zhang (GDGM43345). Tibet Autonomous Region: Nyingchi Prefecture, Milin County, Zarao, Tunburong Village, Zhuoduogou, 29 ° 22′N, 94 ° 22′E, elev. ca. 3500 m, 18 August 2019, on the ground of broad-leaved forest dominated by Q. aquifolioides, Tamdrin Tsering 159 (GDGM73208). Yunnan Province: Chuxing City, Nanhua County, Nanhua Wild Fungus Market, 16 October 2019, Chao-Qun Wang 479 (GDGM79191), Chao-Qun Wang 480 (GDGM79196), Chao-Qun Wang 407 (GDGM79198), Chao-Qun Wang 482 (GDGM79206), Chao-Qun Wang 442 (GDGM79227), Chao-Qun Wang 465 (GDGM79229), Chao-Qun Wang 426 (GDGM79231), Chao-Qun Wang 464 (GDGM79235), Chao-Qun Wang 438 (GDGM79236); Diqing Tibetan Autonomous Prefecture, Shangri-la City, Gezan Town, on the ground of a broadleaf and coniferous mixed forest dominated by Q. aquifolioides and Pinus densata , 16 August 2019, Xiang-Hua Wang (XHW6125); Lijiang City, Jade Dragon Snow Mountain, Lijiang Alpine Botanic Garden, 27°0′2″N, 100°10′52.76″E, elev. ca. 3267 m, 24 August 2019, Jian-Wei Liu (LJW1779); Lijiang City, Ninglang Yi Autonomous County, Hongqiao Town, on the ground of a broadleaf and coniferous mixed forest dominated by Q. aquifolioides and P. densata , 37°33′51.72″N, 100°37′18.71″E, elev. ca. 3487 m, 22 September 2019, Xiang-Hua Wang (XHW6916).
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