Name: Hydnum oregonense Norvell, Liimat. & Niskanen
Most Confident Observations:
Version: 8
Previous Version 


First person to use this name on MO: Joseph D. Cohen

Nomenclature:

Rank: Species

Status: Accepted

Name: Hydnum oregonense

Author: Norvell, Liimat. & Niskanen

Citation: Mycologia https://doi.org/10.1080/00275514.2018.1477004 (2018)

Classification:

Domain: Eukarya

Kingdom: Fungi

Phylum: Basidiomycota

Class: Agaricomycetes

Order: Cantharellales

Family: Hydnaceae

Genus: Hydnum

Lifeform:
Notes on Taxonomy: [Edit]

Subgenus: Hydnum subgenus Rufescentia
Section: Hydnum sect. Rufescentia
Subsection: Hydnum subsect. Tenuiformia
Niskanen, et al., 2018. “Identifying and naming the currently known diversity of the genus Hydnum with an emphasis on European and North American taxa.” Mycologia. https://doi.org/10.1080/00275514.2018.1477004

http://www.indexfungorum.org/...

Brief Description:

Small (cap <= 4.5 cm) toothed fungus with light brownish cap.

Descriptions: [Create]

Comments

Add Comment
Alan Rockefeller’s concept of Hydnum oregonense is too broad
By: Oluna & Adolf Ceska (aceska@telus.net)
2019-11-27 22:00:13 AST (-0400)

and does not make too much sense!
Here is the key:

Supplementary file 2: KEY TO THE KNOWN SPECIES OF HYDNUM

1. Basidiomata more or less white or cream-colored 2
1. Basidiomata ochraceous to orange brown 16

2. Basidiospores av. < 7 × 7 μm 3 (species of H. subg. Albi)
2. Basidiospores av. > 7 × 7 μm 9

3. Majority of the basidiospores > 5.5 μm wide 4
3. Majority of the basidiospores < 5.5 μm wide 5

4. Basidiospores av. around 6.3 × 6.1 μm; known from Papua New Guinea H. treui
4. Basidiospores av. around 6.9 × 6.8 μm; known from Mexico H. zongolicense

5. In North America and Europe 6
5. In Oceania and Eastern Asia 7

6. Basidiospores > 5.5 μm long H. albomagnum
6. Basidiospores < 5.5 μm long H. albidum

7. Basidiospores av. < 5 μm long H. minum
7. Basidiospores av. > 5 μm long 8

8. Known from Japan; associated at least with Quercus; basidiospores 5–7 × 3.5–5.5 μm H. cremeoalbum
8. Known from Papua New Guinea; associated at least with Castanopsis; basidiospores 5.5–6.0 × 4.7–5.5 μm H. subcremeoalbum

9. Q av. value > 1.25 H. subg. Pallidi (incl. H. vesterholtii and H. ibericum, ITS sequence data are needed to reliably distinguish the two species)
9. Q av. value < 1.20 10

10. Basidiospores subglobose to very broadly ellipsoid, usually ranging from roundish to more ellipsoid, Q av. value usually 1.15–1.20 11 (species of H. subg. Hydnum)
10. Basidiospores subglobose, no broadly ellipsoid basidiospores present, Q av. value 1.07–1.13
14 (some species of H. sect. Magnorufescentes)

11. Basidiospores large, av. around 8.5 × 7.3 μm H. olympicum
11. Basidiospores smaller, av. < 8 × 7 μm 12

12. In North America H. neorepandum and H. subolympicum, ITS sequence data are needed to reliably distinguish the two species
12. In Europe and Asia 13

13. In Europe H. repandum and H. boreorepandum, ITS sequence data are needed to reliably distinguish the two species
13. In Eastern Asia H. repando-orientale

14. Basidiospores broad, av. 7.9 × 7.5 μm; currently known from Eurasia H. magnorufescens
14. Basidiospores narrower, av. < 7.7 × 6.9 μm; currently known from North America 15

15. In the interior on the eastern side of the Rocky Mountains. H. albertense
15. On the western side of the Rocky Mountains H. melleopallidum

16. Basidiomata small to medium, usually slender; pileus often, but not always, with a small depression in the center; spines usually non-decurrent 17 (incl. species of H. sect. Rufescentes and some spp. of H. sect. Magnorufescentes)
16. Basidiomata medium to large, fleshy, not slender; pileus without a depression; spines non-decurrent to decurrent 28 (incl. some species of H. subg. Hydnum, H. subsect. Rufescentes and H. sect. Magnorufescentes)

17. Q av. value usually > 1.15 18 (incl. H. subsect. Rufescentes, H. /Ovoideispori, H. ellipsosp.)
17. Q av. value usually < 1.15 22

18. Spores large, av. 10.0 × 6.6 μm H. ellipsosporum
18. Spores < 9.1 × 7.1 μm 19

19. Slender and tidy looking; pileus 12-40 mm, shape ± regular, surface smooth 20
19. More robust, scruffy looking; pileus 25–65 mm, shape irregular, surface smooth or lumpy 21

20. Pileus with deep orange tones; basidiospores av. 8.1–9.3 × 6.4–7.1 μm, sometimes 7.4 × 6.9 μm; in Mediterranean and adjacent area H. ovoideisporum
20. Pileus pale cream-ochraceous to pale orange-ochraceous; basidiospores av.= 7.9 × 6.5 μm; in hemiboreal areas H. subovoideisporum

21. Pileus colorful, deep reddish orange to medium brownish orange; basidiospores av.= 8.0–8.2 × 6.4–6.8 μm; currently only known from Europe H. rufescens
21. Pileus pale to medium brownish ochraceous; basidiospores wider, av. 8.1 × 7.0 μm; currently only known from North America H. subrufescens

22. Basidiospores large, av. > 8.6 × 7.9 μm 23 (incl. species of H. subsect. Tenuiformia)
22. Basidiospores smaller, av. 7.5–8.6 × 6.6–7.7 µm 24 (incl. species of H. subsect. Mulsicolores, H. melitosarx, H. quebecense and some species of subgenus Magnorufescens)

23. Basidiospores large, av.= 9.5 × 9.0 μm H. oregonense
23. Basidiospores smaller, av. < 9.0 × 8.2 μm H. cf. umbilicatum

24. Basidiospores large, av. about 8.5 × 7.5 μm H. canadense, H. submulsicolor, and H. quebecense, ITS sequence data are needed to reliably distinguish the three species
24. Basidiospores smaller, av. < 8.0 × 7.3 μm 25

25. Basidiospores on average about 8.0 μm long H. melitosarx
25. Basidiospores on average about 7.5 μm long 26

26. Spines non-decurrent H. mulsicolor
26. Spines decurrent 27

27. Pileus very pale to medium orange ochraceous; currently known from Europe H. jussii
27. Pileus cream-ochraceous to very pale brownish ochraceous; currently known from Western North America H. melleopallidum

28. Basidiospores subglobose, no broadly ellipsoid basidiospores present, Q av. value 1.07–1.13
29 (incl. species of H. sect. Magnorufescentes)
28. Basidiospores subglobose to broadly ellipsoid, Q av. value usually 1.15–1.30 30

29. Pileus very pale to medium orange ochraceous; currently known from Europe H. jussii
29. Pileus cream-ochraceous to very pale brownish ochraceous; currently known from Western North America H. melleopallidum

30. Spines non-decurrent; basidiomata medium-sized 31 (incl. species of H. subsect. Rufescentes)
30. Spines decurrent, rarely non-decurrent; basidiomata medium- to large 32 (incl. species of
H. subg. Hydnum)

31. Pileus colorful, deep reddish orange to medium brownish orange; basidiospores av.=8.0–8.2 × 6.4–6.8 μm; currently only known from Europe H. rufescens
31. Pileus pale to medium brownish ochraceous; basidiospores wider, av. 8.1 × 7.0 μm; currently only known from North America H. subrufescens

32. Currently known from North America H. subolympicum
32. Currently known from Europe 33

33. Basidiospores broader, av.= 7.8 × 6.8 μm H. repandum
33. Basidiospores narrower, av.= 7.5 × 6.3 μm H. slovenicum

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Created: 2018-05-31 11:55:44 AST (-0400) by Joseph D. Cohen (Joe Cohen)
Last modified: 2019-11-27 22:00:13 AST (-0400) by Joseph D. Cohen (Joe Cohen)
Viewed: 171 times, last viewed: 2020-06-10 20:35:57 AST (-0400)
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