Laetiporus sulphureus (Bull.: Fr.) Murrill, 'N. American form'

English

Laetiporus sulphureus (Bull.:Fr.) Murrill, Mycologia 12:11, 1920. ‘N. American form’.

Basidiocarps annual, laterally stipitate, substipitate or sessile, imbricate; pileus dimidiate, up to 45 cm long, 30 cm wide and 3 cm thick, upper surface bright salmon orange (Burdsall & Banik 2001), bright ochraceous when dry; pore surface lemon yellow to bright creamy yellow, fading to pale tan on drying, pores nearly circular at first, becoming more angular in age, 2-4 per mm; tube layer up to 5 mm; context pale yellow drying crumbly or chalky, up to 3 cm thick. Hyphal system dimitic; contextual generative hyphae thin-walled, hyaline, simple-septate, with rare branching, up to 15 µm in diam.; contextual binding hyphae firm- to thick-walled, up to 18 µm in diam.; tramal generative hyphae thin-walled, hyaline simple-septate, 2.5-5 µm diam.; tramal skeletal hyphae thick- to firm-walled, 2.5 - 5 µm in diam. Basidia clavate, 4 sterigmate, tubular, 15 × 7.5 µm (Burdsall & Banik 2001), simple-septate at the base. Basidiospores ovoid to ellipsoid, hyaline, smooth, IKI-, CB-, 5-6.8 × 4-5 µm, L = 5.7 µm, W = 4.3 µm, r = 1.32, R = 1.10-1.50.

•Substrata: hardwoods species especially Quercus spp. occurring on logs and on the trunks of living or dead trees,

•Distribution: throughout eastern North America except for in the states along the Gulf of Mexico (Burdsal l & Banik 2001).

•Type of rot: brown rot, heart rot , stem rot, frequently occurring on the trunks as much as 3m or more above ground level.

•DNA sequences (nuclear ribosomal DNA of ITS1, 5.8S and ITS2): EU402568[[1]], EU402567[[2]], EU402566[[3]], EU402565[[4]], EU402564[[5]], EU402563[[6]], EU402562[[7]], EU402561[[8]]

Japanese

子実体は1年生、複数の傘が重なり合って発生する。傘は貝殻型、傘の表面は生時は明るいサーモンオレンジ色 (Burdsall & Banik 2001)、のちに色あせて淡褐色になる。子実層托は菅孔状、菅孔表面はレモンイエローから明るいクリームイエロー、のちに色あせて淡褐色になる。孔口は2-4個/mm。菅孔の長さは5mm以下。傘肉は淡黄色からほぼ白色、新鮮時は多湿柔軟でもろい肉質、古くなり乾燥するともろく砕けやすくなる。 子実体組織の菌糸型は2菌糸型：傘肉の原菌糸は無色、薄壁、クランプをもたない、ほとんど分岐しない、径15µm以下。結合菌糸は径18 µm以下。実質組織の原菌糸は薄壁、無色、クランプを欠く、径2.5-5.0µm。骨格菌糸は厚壁、無色、径2.5-5.0µm。 担子器は4小柄、大きさ15 × 7.5µm　(Burdsall & Banik 2001)、基部にクランプを欠く。 担子胞子は楕円形～卵形、無色、平滑、IKI-, CB-,　5-6.8 × 4-5 µm, L = 5.7 µm, W = 4.3 µm, r = 1.32, R = 1.10-1.50.（Ota et al. in preparation）。

•基質および宿主： 広葉樹、とくにコナラ属。倒木あるいは生立木の幹

•分布：メキシコ湾周辺の州を除く北アメリカ東部

•腐朽型・腐朽部位：褐色腐朽、幹心材腐朽、しばしば地上3m以上の場所に発生する。