Intermediate grape base
Intermediate grape base | ||||||||||||
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Systematics | ||||||||||||
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Scientific name | ||||||||||||
Botryobasidium medium | ||||||||||||
Eriksson |
The intermediate grape basidia ( Botryobasidium medium ) is a mushroom species from the family of grape basidia relatives (Botryobasidiaceae). It forms resupinate, cobweb-like fruiting bodies that grow on dead wood of deciduous trees and conifers . Their distribution covers a Holarctic area. The anamorphic of the species has been described under the name Haplotrichum medium .
features
Macroscopic features
The intermediate grape basidia has spinous fruiting bodies that grow resupinate (adjoining) to slightly effus (protruding) on their substrate and appear net-like under the magnifying glass. They are 1.25–2 mm thick, white when fresh and turn ivory in color when dry.
Microscopic features
As with all grape basidia , the hyphae structure of Botryobasidium ellipsosporum is monomitic , i.e. it consists only of generative hyphae that branch out at right angles. The basal hyphae are hyaline , narrow (mostly 7.5–9 µm wide) and strongly cyanophilic. The 5–6.5 µm thick subhymenial hyphae are hyaline , short-celled and thin-walled. The species has buckles but not cystids . The six- to eight-pore basidia of the intermediate grape basidia grow in nests, measure 13–22 µm in length, are cylindrical and slightly narrowed in the middle. The spores are broad spindle-shaped to boat-shaped and mostly 10–11.5 × 5–6 µm in size. The spores germinate in conidiophores , on which 15–25 × 5–7 µm large conidia arise.
distribution
The species area of the Intermediate Grape Basidy is Holarctic . It is considered rare and has so far been detected in Europe and North America.
ecology
The intermediate grape basidia is like all grape basidia a deadwood colonizing saprobiont . It was found on rotten trunks of various deciduous and conifer species lying on the ground .
literature
- Věra Holubová-Jechová: New species of the genus Oidium Link ex Fr. emend. Linder. In: Česká Mykologie , 23 (4), 1969, pp. 209–221.
- German Josef Krieglsteiner (Ed.): The large mushrooms of Baden-Württemberg . Volume 1: General Part. Stand mushrooms: jelly, bark, prick and pore mushrooms. Ulmer, Stuttgart 2000, ISBN 3-8001-3528-0 .