Thursday, November 17, 2011

Specimen #9: Purple Basidiomycete

Figure 1: immature basidiocarp with purple gills

Figure 2: Immature basidiocarp upright

Name: Laccaria ochropurpurea
Family: Tricholomataceae
Collection Date: September 11, 2011
Habitat: Under tree in a yard
Location: Warren, OH
Description: purple-gilled basidiocarp, appearing to not be fully matured.  Lightly lavender pileus and stipe.  Approximately 3 inches long, but shrunk considerably when dried.
Collector: Taylor Summerfield


Key used: Arora, David, 1986. Mushrooms Demystified, 2nd Edition, Ten Speed Press, New York, New York.

Key Steps: Key to the Major Groups of Fleshy Fungi
1. Spores produced on mother cells called basidia; fruiting body variously shaped (see pp.52-54)...Basidiomycotina, P.57



Key to Basidiomycetes:
1. Basidia and spores borne externally...2
2. Fruiting body not at first egglike with gelatinous interior, no slime covering fruiting body...Hymenomycetes, below

Key to Hymenomycetes:
1. No pores or tube mouths on underside of cap...3
3. Underside of cap radiating blades (gills)...Agaricales, below

Key to the Agaricales:
1. Spore frocibly discharged, hence a spore print obtainable...2

2. Spore print lilac tinged...3
3. No volva or warts...4
4. Veil absent...6
6. Gills usually platelike or bladelike...7
7. Gills not exuding a latex when broken...8
8. Fruiting body not rigid...9
9. Gills not normally waxy...Tricholomataceae, p. 129
Key to Tricholomataceae:
1. Not growing on other mushrooms...2
2. Fruiting body not pinkish...3
3. Stalk present and well-developed...6
6. Stalk not arising from underground "tuber"...7
7. Veil absent...8
8. Veil absent...9
9. Gills and stalk not bruising dark gray to black...10
10. Stalk fleshy, usually at least 5mm thick...11
11. Fruiting bottle partially or completely purple...12
12. Gills thickish and fairly well-spaced; stalk fibrous and/or fibrillose; spore print white or lilac tinged...Laccaria, p.171


Key to Laccaria:
1. Gills purple to lilac when fresh...2
2. Not growing in sand...3
3. Fruiting body medium to large, stalk usually less than 1cm thick...Laccaria ochropurpurea

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