Observation 222049: Ramariopsis subtilis (Pers.) R.H. Petersen

When: 2015-10-23

Collection location: Essex Co., Ontario, Canada [Click for map]

42.2729° -83.0694° 184m

Who: Chris Hay (hayfield)

Specimen available


Little highly branched corals, abundant but tiny
On bare soil below thick goldenrod
Often in little clusters, but also scattered around

Notes on dried specimen 2017-01-27

1 to 1.2cm tall, 0.5-1mm wide near base
Turns dark with FeSO4, but the solution used was 9.5 years old and oxidizing (rusty particles)
“Concave bifurcate at apex” was a fitting description I found for what seems to be the right group of species…

Spores smooth, very apiculate, generally fat oval shapes (subglobose), with large oil droplet in centre
Sizes are min-avg-max after measuring seven:
Length: 4.2-5.3-5.8um (including apiculus – subtract ~1um to correct)
Width: 3.6-4.0-4.5um

Species Lists


in situ
closeups of different parts, top left shows cracking, right two show how inside flesh is a bit darker and more translucent
coral branch tips
Couldn’t get a clear microscope image so here is my sketch of a couple spores
dH2O vs FeSO4 (though oxidated/ rusty bits floating around) – not the green reaction was looking for, but presumably the colour would come out right with a fresh solution?

Proposed Names

28% (1)
Recognized by sight
28% (1)
Used references: blast results from sequence, along with Ramariopsis; no particularly close matches
28% (1)
Used references: Mushrooms Demystified 2nd Ed (Arora 1986) – Keys best to this, along with Clavulinopsis dichotoma and C. subtilis

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
i would say
By: Danny Newman (myxomop)
2017-02-06 05:25:00 +06 (+0600)

you’ve laid all the necessary groundwork for a club and coral wizard to take the wheel, but they are an exceedingly rare sighting here. on the bright side, I have Petersen’s Clavulinopsis book, and could send you some page scans upon request.

subtilis/ umbrinella
By: Chris Hay (hayfield)
2017-01-28 05:47:14 +06 (+0600)

The distinctions between these two with their various synonyms seem to be poorly known, based on other observations on this website and trying to sift through Petersen’s papers. Unfortunately an ID to “Ramariopsis” or “Clavulinopsis” seems about fine either way and doesn’t say much about which species is here. Petersen’s 1968 Clavulinopsis of N.A. may help, but I don’t have a copy.

It seems subtilis is smaller and has smaller spores whereas umbrinella is larger and has larger spores. This specimen is on the smaller size so I’m calling it subtilis.

Created: 2015-11-08 03:26:38 06 (0600)
Last modified: 2018-01-02 08:22:14 06 (0600)
Viewed: 57 times, last viewed: 2018-02-14 06:40:01 06 (0600)
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