Russula subsect. Integroidinae

Russula subsect. Integroidinae
Systematics
Class :	Agaricomycetes
Subclass :	insecure position (incertae sedis)
Order :	Russulales (Russulales)
Family :	Deaf relatives (Russulaceae)
Genre :	Russulas ( Russula )
Subsection :	Russula subsect. Integroidinae
Scientific name
	Russula subsect. Integroidinae
	Romagn. ex. Receipt

Russula subsect. Integroidinae is a subsection of the genus Russula , which is within the section Lilaceae . The taxon was first defined by Romagnesi, but only validly described by Bon.

features

The representatives of the subsection are medium-sized or large species with a hat diameter of up to 13 cm. The hat is very variable in color, often purple, lavender or greenish, but never pure red or yellow. The taste is mild, but can be sharp in the lamellae and the stem bark. The flesh and stem sometimes tend to gray or blacken. The spore powder is pale ocher yellow.

The spores are thorny to prickly and sometimes reticulate or almost burr-free. The upper layer of the cuticle ( epicutis ) does not contain any dermatocystids , but rather narrow primordial hyphae , hardly more than 5 µm wide and elongated at the ends . Dermatocystiden can be detected in the subcutis. The stem or the meat of the hat contain milk ducts ( laticifers ) that can be stained with sulfobenzaldehyde.

The type species is Russula sericatula , the weakly reacting deaf .

Deaf species of the subsection *Integroidinae*
German species name	Scientific species name	author
Humpback hornbill	Russula caerulea	( Pers. ) Fr. 1888
Yellow gray-stalked deaf **	Russula claroflava	Grove 1838
Brick-brown blotch *	Russula lateritia	Quél. 1885
Soft blubber	Russula mollis	Quél. 1882
Weakly reacting deaf	Russula sericatula	Romagn. (1958)
Burgundy gray-stalked blubber	Russula vinosa	Lindblad 1901
* Russula lateritia is in Romagnesi's (sub) section Laetinae . ** Russula claroflava is in Bon in the Ochroleucinae subsection

Individual evidence

^ Monographic Key to European Russulas. (PDF; 1.4 MB) The Russulales Website, 1988, p. 7 , archived from the original on July 28, 2010 ; Retrieved January 24, 2011 (English translation of M. Bon's Russula key :).
↑ Russulas. (DOC) In: Fungipedia. Asociación Micológica Fungipedia, p. 145 , accessed July 6, 2011 (Spanish).

[bon-key-1] Monographic Key to European Russulas. (PDF; 1.4 MB) The Russulales Website, 1988, p. 7 , archived from the original on July 28, 2010 ; Retrieved January 24, 2011 (English translation of M. Bon's Russula key :).

[spanisch-2] Russulas. (DOC) In: Fungipedia. Asociación Micológica Fungipedia, p. 145 , accessed July 6, 2011 (Spanish).