Key to the Danish species of Leccinum.
| 1: | Flesh is ± gray to black shortly after cutting, blue-green color rare
and only seen in worm gnaw. Cap skin overhanging or not.
in deciduous or coniferous woods, including betula:
| | 9 |
| - | Flesh will not be gray to black shortly after cutting,
but can be red or patchy with vibrant blue-green colors; cap skin not
overhanging, or if slightly then under 1 mm.
Always under betula: | 2 |
| 2: | Cap brown to dark brown, possibly with black weft, stipe scales very dark: | 7 |
| - | Cap color from white to nut brown, stipe scales bright or dark: | 3 |
| 3: | Tube mouths with yellow colours as young or old, or
brown pink colors as old, always dark after pressure: | 6 |
| - | Tube mouts white, gray or gray-brown-ocher brown, irrespective of age;
if dark after pressure then they are always without brown: | 4 |
| 4: | Cap leather brown to gray brown AND flesh clearly reddening after cutting and rubbing. Stipe
scales forming dark longitudinal stripes on a light base: | L. scabrum var roseofractum |
| - | flesh not blushing red. Stipe scales eighter a light, tight-fitting wooly
coating, or as dark spots: | 5 |
| 5: | Cap smooth to finely felted, as old cap with very soft flesh and
greasy surface (*): | L. cyaneobasileucum |
| - | Cap fine felted to tufty, cap flesh fairly firm, even in older speciments:
| L. nucatum |
| 6: | Cap on old speciments with a soft surface which as damp, turns green after rubbing.
Tube mouts as young without yellow, as old yellowish or brownish pink:
| L. holopus |
| - | Cap is not, or at most slightly pale green after rubbing.
Tube mouts as young with a bright yellow color, that becomes more
muddy with age possibly disappear completely: | L. schistophilum |
| 7: | (2 -> 7) ---- Cap dark, flesh not darkening or turning grey ---- | |
| - | Stipe flesh blue-blue-green in places. Cap with blackish spots or strokes in places,
in other places marbled in light colors (*):
| L. variicolor |
| - | Blue or green colors not present: | 8 |
| 8: | Stipe scales black, stipe gray in between the scales, maybe white at top.
Cap black to blackish dark brown: | L. melaneum |
| - | Stipe scales blackish or gray, white in between the scales and at top.
Cap most often in less dark brown colors: | L. scabrum |
| 9: | (1 -> 9) ---- Flesh becomes gray or black ---- | |
| - | Tube mouts yellow, also on young mushrooms: | L. crocipodium |
| - | Tube mouts in any other color, at least at young speciments: | 10 |
| 10: | Cap skin not overhanging. On clay, mould or calcareous
substrates, with hornbeam or
hazel: | L. pseudoscabrum |
| - | Cap skin overhanging (at least 1 mm).
Not mycorrhiza with hornbeam or
hazel: | 11 |
| 11: | Cap brown, overhanging cap skin unbroken at margin; under aspen
or cultivated poplars: | L. duriusculum |
| - | cap orange, red, maroon, rarely white. Overhanging hat skin as
separated flakes at cap margin. Found under aspen
as well as other trees: | 12 |
| 12: | Stipe scales reddish-brown to black. Found under betula
as well as other trees: | 14 |
| - | Stipe scales white to reddish-brown. Not under betula:
| 13 |
| 13: | Under oak or poplar, possibly also other deciduous woods; stipe scales dark
already when young. Note: If the vegetation is so high that the stipe has never
seen the light the scales may be white, but then look at the color of the cap:
it should be vivid red or sometimes brown; at dried specimens dark reddish brown:
| aurantiacum |
| - | Under aspen, stipe scales first white,
later maroon. Cap vivid orange, on dried mushroom light brown: | L. albostipitatum |
| 14: | Under betula, stipe thick with scales black as coal
( incredibly beautiful ). Cap orange-red, orange, seldom white:
| L. versipelle |
| - | Under pinaceae, in a few cases piceae
or arctostaphyllos. Cap rather dark brownish red to brown.
Stem scales first light, soon reddish brown or even blackish: | L. vulpinum |
: Leccinum
: To Danisk version of this key