fruitbody of Russula claroflava is ectomycorrhizal with live root of Betula
Remarks: Other: uncertain
Other: sole host/prey
Plant / associate
fruitbody of Russula claroflava is associated with Sphagnum
In Great Britain and/or Ireland:
Fungus / saprobe
fruitbody of Tephrocybe mephitica is saprobic on dead, decayed, buried fruitbody of Russula claroflava
Other: unusual host/prey
|gills on hymenium|
|cap is convex|
|hymenium is free|
|stipe is bare|
|spore print is white|
|ecology is mycorrhizal|
Russula claroflava, commonly known as the yellow swamp russula or yellow swamp brittlegill, is a basidiomycete mushroom of the genus Russula. It is found in wet places under birch and aspen woodlands across Europe and North America. It has a yellow cap, white gills and stipe and bruises grey. It is mild-tasting and regarded as good to eat.
This medium-sized member of the genus Russula has a cap that is an egg-yolk yellow. Measuring 4–10 cm (1.5 4 in) in diameter, it is slightly sticky, and leaves and other debris often stick to it. There is usually a slight depression in the centre of mature specimens, with the margin becoming furrowed. The cap is half peeling. The 4–10 cm (1.5–4 in) high stem is white, fairly firm, straight and 1–2 cm thick. Its gills are pale ochre, and are adnexed to almost free. All parts turn dark grey on aging or bruising. The smell is fruity and the spore print is pale ochre, and the oval warty spores average 9.5 x 8 μm. The edible but acrid Russula ochroleuca resembles this species, but has a duller yellow cap.
Distribution and habitat
Russula claroflava appears in summer and autumn, usually with birch (Betula), or aspen (Populus), on heaths and moors, preferring damp places near ponds or lakes, often occurring in sphagnum. It is occasionally found in drier places. It occurs in Britain, across northern Europe, and throughout North America.
- Grove WB. (1888). "Wayside notes". Midland Naturalist 11: 265–266.
- Nilson S, Persson O (1977). Fungi of Northern Europe 2: Gill-Fungi. Penguin. p. 114. ISBN 0-14-063006-6.
- Phillips R (2006). Mushrooms. London: Pan MacMillan. p. 40. ISBN 0-330-44237-6.
- Arora, David (1986). Mushrooms demystified: a comprehensive guide to the fleshy fungi (2nd ed. ed.). Berkeley: Ten Speed Press. p. 92. ISBN 0-89815-169-4.
- Marcel Bon, The Mushrooms and Toadstools of Britain and North Western Europe.
- Courtecuisse and Duhem, Mushrooms and Toadstools of Britain and Europe.
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