First person to use this name on MO: Danny Newman
Name: Coprinopsis sect. Alachuani
Author: (Singer) D.J. Schafer ined.
Basidiocarps very small to medium-sized; expanded pileus 6-60 mm. Pileus with veil made up of weakly to strongly diverticulate, and then often thick-walled elements. Stipe smooth, but in most cases covered with very small velar flocks, especially at base (subsect. Alachuani Sing.).
1. Spores smooth, without ornamentation.
2. Basidia 2-spored; spores amygdaloid and truncate: C. piepenbroekii
2. Basidia 4-spored; if spores amygdaloid then never truncate.
3. Average spore length > 10 µm; on dung or soil
(if not on dung or soil step 20).
4. Elements of veil thick-walled, with ascending terminal elements: C. vermiculifer
4. Elements of veil thin-walled; walls < 0.5 µm thick.
5. Breadth of spores < 10 µm.
6. On dung; small species; veil hairy.
7. Pileus white when young; average spore length > 11 µm: C. xenobius
7. Pileus yellow when young; average spore length < 11 µm: C. luteocephalus
6. Not on dung; medium species; veil in patches: C. stanglianus
5. Breadth of spores > 10 µm.
8. On dung, growing on sclerotia: C. sclerotiorum
8. On soil, not on sclerotia: C. picaceus
3. Average spore length < 10 µm.
9. On dung; spores cylindrical ovoid, rounded rectangular: C. filamentifer
9. Not on dung; spores otherwise shaped.
10. Average spore length < 6 µm if veil thin-walled, < 6.5 µm if veil thick-walled.
11. Veil thick-walled; spores globose: C. herinkii
11. Veil thin-walled; spores the shape of a maize-kernel: C. argenteus
10. Average spore length > 6 µm if veil thin-walled, > 6.5 µm if veil thick-walled.
12. Elements of veil thin-walled; walls < 0.5 µm thick.
13. Large species; pileus 50-100 mm when expanded; base of stipe with dark red-brown rhizomorphs: C. strossmayeri
13. Smaller species; pileus 5-40 mm when expanded; no rhizomorphs at base of stipe.
14. Spores rounded quadrangular, with apical papilla: C. episcopalis
14. Spores subglobose to ellipsoid or ovoid, without apical papilla.
15. Terrestrial, on burned or bare soil, or in lawns.
16. Average Q of spores > 1.25.
17. Pleurocystidia up to 55 µm in length with Q c. 2: C. fluvialis
17. Pleurocystidia becoming longer with Q 2.5 and more: C. urticicola var. urticicola
16. Average Q of spores < 1.25.
18. Usually on burned places; expanded pileus 15-30 mm wide: C. gonophyllus
18. In lawns, often on bare soil; expanded pileus 8-15 mm wide: C. epichloeus
15. Not terrestrial, not on soil.
19. Average Q of spores < 1.2.
20. Stipe 2-6 mm wide; on straw, coconut mattings, rotting textiles and straw containing materials like ceilings in old buildings etc., in Europe usually indoors: C. kimurae
20. Stipe 0.5-2 mm wide; on Phragmites, Juncus, and the like, outdoors: C. kubickae
19. Average Q of spores > 1.2.
21. Average Q of spores > 1.55; expanded pileus 10-20 mm wide; spores dark brown: C. goudensis
21. Average Q of spores < 1.55; expanded pileus 6-15 mm wide; spores pale to medium brown.
22. Veil of young pileus white, at centre sometimes pale ochraceous; usually on grasses, but also on other vegetable refuse, sometimes on wood: C. urticicola var. urticicola
22. Veil of young pileus dark grey at centre; on dead branches of willow: C. urticicola var. salicicola
12. Elements of veil thick-walled; walls > 0.5 µm thick in places.
23. Veil mixed with long, brown, thick-walled hairs: C. spilosporus
23. No long, brown, thick-walled hairs present.
24. Walls of velar elements up to 1.5(-2) µm thick in places.
25. Spores short ovoid or subglobose, lentiform: C. phaeosporus
25. Spores broadly ellipsoid, ovoid or slightly rhomboid; not distinctly lentiform.
26. Pleurocystidia 20-50 µm wide: C. xantholepis
26. Pleurocystidia 10-30 µm wide.
27. Veil on pileus white or ochre-brown; excrescences (micr.) often tapering with pointed apex: C. pseudofriesii
27. Veil on pileus dark brown, sepia; excrescences (micr.) often cylindrical with rounded apex: C. tigrinellus
24. Walls of velar elements over 2 µm thick in places: C. friesii
1. Spores warty.
28. Spores amygdaloid: C. echinosporus
28. Spores ellipsoid, ovoid.
29. Basidia 4-spored: C. phlyctidosporus
29. Basidia 2-spored: C. rugosobisporus
Coprinopsis genus belongs to family Psathyrellaceae.. not Agaricaceae.
Created: 2011-10-25 14:09:45 PDT (-0700) by Danny Newman (myxomop)
Last modified: 2019-02-12 03:58:21 PST (-0800) by Danny Newman (myxomop)
Viewed: 118 times, last viewed: 2019-02-12 10:35:15 PST (-0800)