Name: Datronia Donk
Most Confident Observations:
762981
Copyright © 2017 Hans W. Dahners (Atlides)
755477
Copyright © 2017 Hans W. Dahners (Atlides)
746083
Copyright © 2015 Danny Newman (myxomop)
Version: 4
Previous Version 


First person to use this name on MO: Debbie Drechsler
Editors: Nathan Wilson, walt sturgeon, Chaelthomas

Nomenclature:

Rank: Genus

Status: Accepted

Name: Datronia

Author: Donk

Citation: Persoonia 4(3): 337 (1966)

Classification:
Notes on Taxonomy: [Edit]

Habitat: On hardwoods and conifers, causing a white rot.
Basidiomata pileate, reflexed or effuse, annual, leathery; pileus up to 2.5 cm wide × 6 cm long × 1 cm thick, elongated or dimidiate to broadly attached, tough; pileus surface near white, brown, becoming dark brown to black, typically concentrically zonate, tomentose to radially strigose, velutinate becoming glabrous; context up to 3 mm thick, duplex, pale buff to pale brown with a thin black line separating the darker tomentum on the surface; tubes cork to buff, up to 7 mm thick; pore surface white, buff to pale brown, pale pinkish buff to umber brown; pores round, somewhat angular, hexagonal, or daedaleoid, 1–5 per millimetre, edges thick, entire, granulose at 30× magnification.
Hyphal system trimitic. Generative hyphae 2.0–4.5 μm diameter with clamp connections; skeletal hyphae 2–4 μm diameter, walls pale yellow, pale green- ish brown but dark brown in the pileus surface layer; binding hyphae 2–3 μm diameter, walls pale yellow; cystidia lacking; cystidioles only in D. mollis, fusoid, 25–45 × 4–5 μm; dendrohyphidia around the pore mouths in D. mol- lis and D. stereoides, 1.5–3.0 μm diameter with numerous short branches near the apex; basidia narrowly clavate, clavate or broadly clavate, 20–45 × 5.0– 8.5 μm, four sterigmate; basidiospores cylindrical to narrowly ellipsoid,
8–13 × 3–6 μm, walls hyaline, thin, smooth, neither amyloid nor dextrinoid.
1a On conifers……………………………………………………………….D. stereoides 1b On hardwoods………………………………………………………………………….2 2a Pores 1–2 per millimetre, angular to daedaleoid…………………… D. mollis 2b Pores 4–5 per millimetre, round to hexagonal ………………………………..3 3a Basidioma effuse………………………………………………………..D. stereoides 3b Basidioma pileate or reflexed …………………………………………………….. 4
4a Pores hexagonal; pore mouths granulose; context with a black line separating the dark tomentum adjacent to the pileus surface from the pale brown layer adjacent to the tube layer; dendrohyphidia present; basidiospores 4.5–6.0 μm wide ………………………………………………………..D. stereoides
4b Pores round or slightly angular; pore mouths not obviously granulose; context uniformly pale yellow brown to pale brown; pileus surface a black crust; dendrohyphidia lacking; basidiospores 3.0–3.5 μm wide …………………………………….. D. scutellata

Descriptions: [Create]

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Created: 2007-02-17 22:53:35 CST (-0500) by Debbie Drechsler (debdrex)
Last modified: 2018-03-28 03:53:00 CDT (-0400) by Chaelthomas (Chaelthomas)
Viewed: 156 times, last viewed: 2018-06-22 14:00:35 CDT (-0400)
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