Public Description of Inonotus radiatus (Sowerby) P. Karst.

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Name: Inonotus radiatus (Sowerby) P. Karst.
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 Draft For Wild Mushrooms Of The Northeastern United States By Herbert Baker (Private)

Description status: Unreviewed

Taxonomic Classification:

Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Hymenochaetales
Family: Hymenochaetaceae

General Description:

Cap: Usually present and well developed, but sometimes present merely as a folded-over edge above a spreading pore surface; up to 7 cm across and 6 cm deep; semicircular to kidney-shaped; often arranged in shelves and sometimes fused laterally with other caps; usually convex to planoconvex; very finely velvety when young, becoming bald with age; yellowish to orangish at first, becoming yellowish brown and eventually darkening to dark brown or black; often zoned; the margin thin and often wrinkled.

Pore Surface: Yellowish brown when young, becoming brown; with 3-5 angular pores per mm; tubes to 8 mm deep.

Stem: Absent.

Flesh: Yellowish brown to reddish brown; corky; faintly zoned.

Chemical Reactions: Flesh black with KOH.

Spore Print: Yellowish to brownish.

Spores 5-6.5 × 3-4.5 µ; smooth; ellipsoid; hyaline to faintly yellowish in KOH; inamyloid or faintly dextrinoid. Hymenial setae scattered; to about 50 × 12 µ; fusoid; often with a swollen base. Setal hyphae absent. Hyphae thin- to thick-walled; 3-7 µ wide; simple-septate


fairly widely distributed from the Great Plains to the maritime provinces, and rare to occasional in the Pacific Northwest (primarily on alders).


Saprobic on the deadwood of hardwoods (especially birches and alders but also on beech, maples, and other hardwoods); causing a soft white rot; annual; growing alone, gregariously, or in shelving clusters; summer and fall (or over winter in warm climates)


Kuo, M. (2010, March). Inonotus radiatus. Retrieved from the MushroomExpert.Com Web site:


Inonotus radiatus (Sowerby) P. Karst., Revue mycol., Toulouse 3(no. 9): 19 (1881)

Sanctioning author:

Current Name:
Xanthoporia radiata (Sowerby) Ţura, Zmitr., Wasser, Raats & Nevo, Progress in Mycological Research (St Helier) 2: 270 (2012)


Description author: Herbert Baker (Request Authorship Credit)
Description editor: walt sturgeon

Created: 2013-07-27 15:06:17 CEST (+0200) by Herbert Baker
Last modified: 2014-01-21 20:42:59 CET (+0100) by walt sturgeon (Mycowalt)
Viewed: 7 times, last viewed: 2016-12-12 11:22:32 CET (+0100)