Zhuliangomyces, Redhead, 2019

Huang, Ting, Zhang, Wen-Hao, Huang, Hong-Yan, Gu, Yan-Ming & Tang, Li-Ping, 2022, Two new species of Zhuliangomyces (Amanitaceae) from Hainan Island, China, Phytotaxa 575 (1), pp. 57-67 : 65

Key to the species of Zhuliangomyces

1. Pileus cream white to slightly pale yellowish-brown.........................................................................................................................2

1*. Pileus yellowish-brown to dark brown to dark olivaceous ................................................................................................................4

2. Pileus cream white, without yellowish tone, 33–42 mm diam.; lamellae pinkish; basidiospores broadly ellipsoid to ellipsoid, 5.4–7.8 × 4.3–6.4 μm, Q = 1.2–1.5; growing in broad-leaved forests of Acacia modesta .............................................................. ......................................................................................................................................... Z. pakistanicus ( Usman & Khalid 2020)

2*. Pileus white, more or less with pale yellowish tone; lamellae white .................................................................................................3

3. Pileus up to 60 mm diam., margin non-striate; basidiospores broadly ellipsoid, rarely ellipsoid, 4.0–5.0 × 3.5–4.0 μm, Q = 1.12– 1.34; growing in mixed forests............................................................................................................. Z. illinitus ( Cui et al. 2018)

3*. Pileus up to 55 mm diam., with obvious striation at margin; basidiospores subglobose to broadly ellipsoid, 5.0–7.0 × 4.5–6.0 μm, Q = 1.05–1.20................................................................................................................ Z. subillinitus ( Guzmán & Johnson 1974)

4. Pileus dark olivaceous, umbonate, 30–50 mm diam.; margin non-striate; basidiospores broadly ellipsoid to ellipsoid, 3.5–5.0 × 2.5–3.5 μm, Q = 1.21–1.56; fruiting on soil under Rhododendron .............................................. Z. olivaceus ( Cui et al. 2018)

4*. Pileus yellowish-brown to dark brown...............................................................................................................................................5

5. Pileus margin non-striate....................................................................................................................................................................6

5*. Pileus margin striate ...........................................................................................................................................................................7

6. Pileus yellow to pale brown yellow; annulus large and conspicuous.................................................. Z. lenticularis ( Lasch 1828)

6*. Pileus chocolate to dark brown, especially obvious when young; annulus very thin; basidiospores broadly ellipsoid, 4.0–5.0 × 3.0–4.5 μm, Q = 1.15–1.28; growing on the ground in broad-leaved forests .................................................. Z. terrus (this study)

7. Pileus up to 40 mm diam., non-umbonate, light grayish brown, easily separated from stipe when mature; basidiospores subglobose to broadly ellipsoid, 3.5–4.5 × 3.0–4.0 μm, Q = 1.03–1.07; fruiting in bamboo woods........................... Z. bambusus (this study)

7*. Pileus up to 60 mm diam., umbonate, brown-yellow, not easily separated from stipe; basidiospores broadly ellipsoid to subovoid, 4.0–5.0 × 3.5–4.0 μm, Q = 1.13–1.33; growing in mixed forests ........................................................................................................ .................................................................................................... Z. ochraceoluteus ( Neville & Poumarat 2004; Cui et al. 2018)