Observation 79309: Panaeolina foenisecii (Pers.) Maire
When: 2011-10-07
Who: Byrain
Herbarium specimen reported

Notes: Growing in grass, found in the same field as the Panaeolus sp. in observation 78116.

Spore measurements:

14×8
15×7
15×7
15×8
15×8
15×8
15×8
15×8
15×8
15×8
15×9
15×9
16×6
16×7
16×8
16×8
16×8
16×8
16×8
16×9
16×9
16×9
16×9
16×9
16×9
16×9
16×9
16×9
17×7
17×8
17×8
17×8.5
17×9
17×9
17×9
17×9
17×9
17×9
17×9
17×9
17×9
17×10
17×10
18×7
18×8
18×8
18×9
18×9
19×7

Q average = 1.95

Images

173996
173997
173998
Spores from gill
1000x
Mounted in H2O
1μ divisions
173999
Spores from gill
1000x
Mounted in H2O
1μ divisions
174000
Spores from gill
1000x
Mounted in H2O
1μ divisions
174001
174003
174004
Pileipellis
1000x
Mounted in H20
1μ divisions
174006
Spores from gill
1000x
Mounted in H2O
1μ divisions
174007
Spores from gill
1000x
Mounted in H2O
1μ divisions
174008
Spores from gill
1000x
Mounted in H2O
1μ divisions
174009
174018
Siamese heart-shaped spore with two germ pores.
1000x
Mounted in KOH
1μ divisions
174022
Spores from gill, image created from two stacked pictures with combineZP to emphasize the ornamentation
1000x
Mounted in KOH
174355
Spores with 1-2 oil drops
1000x
Mounted with KOH

Proposed Names

-46% (2)
Recognized by sight: subgenus Panaeolus, section Verrucispora
Used references: Gerhardt Panaeolus key
Based on microscopic features: Fine asperulate spores, 14-19 (21) x 6-10 (12) μ based on 49 measurements, average size is 16.31 × 8.38 μ.
83% (3)
Eyes3
Recognized by sight
Based on microscopic features: Roughened spores (Maybe not roughened enough?), spore size close to Gerhardt’s range ((11,5)14-17(22) x (7,5)8,5-11) if not too large, long cheiolocystidia.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
Oil drops
By: Byrain
2011-10-12 22:12:10 PDT (-0700)

Most of my spore pictures don’t show it, but nearly every spore has 1-2 oil drops, I added a picture illustrating this better. Gerhardt’s key uses this to separate Panaeolina foenisecii from P. castaneifolia & P. indica"

“Key: Species of the genus Panaeolina
1 Spores normally with 1 to 2 big oildrops (also at exsiccatum); nearly cosmopolitan species ……………………………….. Panaeolina foenisecii (30)
- Spores normally without oildrops ………………………… 2
2 Breadth of spores not more than 10 Lim, ornamentation like foenisecii; basidia constantly 4-spored; robust Northamerican species Panaeolina castaneifolia (31)
- Breadth of spores up to 12 Lim, ornamentation more coarsely as foenisecii; basidia 1- to 4-spored; Indian species …………………………….. Panaeolina indica (32)”

Created: 2011-10-11 05:11:22 PDT (-0700)
Last modified: 2012-10-29 00:16:41 PDT (-0700)
Viewed: 192 times, last viewed: 2016-11-22 18:29:16 PST (-0800)
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