Punctularia bambusicola C.L. Zhao, 2021

Guan, Qian-Xin, Zhao, Wei & Zhao, Chang-Lin, 2021, A new species of Punctularia (Punctulariaceae, Basidiomycota) from southwest China, Phytotaxa 489 (3), pp. 285-292 : 288

Punctularia bambusicola C.L. Zhao , sp. nov. ( Figs. 2 , 3 )

MycoBank no.: MB 838694

Holotype.— CHINA. Yunnan Province, Puer, Zhenyuan County, Heping Town , Ailaoshan National Nature Reserve , E 100°54′52′′, N23°46′32′′, alt. 2136 m, on dead bamboo, 1 January 2019, CLZhao 9098 ( SWFC).

Etymology.— Bambusicola (Lat.): referring to the host of bamboo.

Basidiomata. —Annual, resupinate, adnate but easily separable, gelatinosus when fresh, becoming rigid upon drying, up to 27 cm long, up to 5 cm wide, 100–300 µm thick. Hymenial surface tuberculate with rose tints, pink to rose when fresh, turn to lilac to purple upon drying. Sterile narrow, white.

Hyphal structure. —Hyphal system monomitic; generative hyphae with clamp connections, IKI–, CB –; tissues unchanged in KOH. Subiculum absent or indistinct, suhymenial generative hyphae hyaline, more or less interwoven, thin-walled, frequently branched, 2–3 µm in diam., abhymenial generative hyphae brown, thick-walled, branched, 3–5 µm in diam.

Hymenium.—Cystidia and cystidioles absent; dendrohyphidia numerous, yellowish to brown, thin-walled, with short branches, usually forming a catahymenium, 19–42 × 1.5–3 µm; basidia clavate, flexuose, with four sterigmata and a basal clamp connection, 17.5–21.5 × 4–5.5 µm; basidioles dominant, in shape similar to basidia, but slightly smaller.

Spores. —Basidiospores ellipsoid, yellowish, thin-walled, smooth, IKI–, CB –, 6.5–8.5(–9) × 3.5–5 µm, L = 7.62 µm, W = 4.48 µm, Q =1.7 7 (n = 60/2)..

Additional specimen examined.— CHINA. Yunnan Province, Puer, Jingdong County, Wuliangshan National Nature Reserve ,, E 100°54′46′′, N23°46′45′′, alt. 2169 m, on dead bamboo, 5 October 2017, CLZhao 4133 ( SWFC) .

Figures

FIGURE 2. Basidiomata of Punctularia bambusicola (holotype Bars: A = 7.5 cm, B = 3 cm. Drawings by: Qian-Xin Guan.

FIGURE 3. Microscopic structures of Punctularia bambusicola (drawn from the holotype). A: basidiospores. B: basidia and basidioles. C: a section of hymenium. Bars:A = 5 μm, B–C = 10 μm. Drawings by: Qian-Xin Guan.