Observation 215748: Clavulinopsis gracillima (Peck) R.H. Petersen

When: 2015-07-17

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

42.2729° -83.0688° 178m

Who: Chris Hay (hayfield)

Specimen available


spindly yellow Clavaria emerging from soil under a shaded shrub/ thick grass, a semi-restored tall grass prairie

sequencing is in the works, will update observation later

Additional notes from dried specimen 2017-01-27

-1.5cm tall, ~1mm wide max
-has slightly darker and narrower “stalk” at base, upper hymenophore paler (see 2nd image especially – the “V” pair)
-no 10% KOH reaction on dried material compared with dH2O (Kuo notes a greenish colour change for C. laeticolor)

-Few spores on specimen but definitely apiculate, mostly kind of round tear shaped subglobose to longer and somewhat elliptical, appeared smooth as far as I could tell (not “tuberculate” for C. helvola)
-When it came to measuring only found three before giving up, were rolling around while trying to measure so avg dimensions only for a vague idea… Averages: Length 5.2um, Width 3.8um (C. gracillima is 5.5-8.5 × 3-4.5 in Smith & Smith reference)

Species Lists


in the tackle box
Note darker sterile “stalk” base and buff yellow paler upper hymenophore

Proposed Names

28% (1)
Recognized by sight
45% (2)
Recognized by sight
-45% (2)
Recognized by sight
-2% (2)
Recognized by sight
28% (1)
Recognized by sight
Used references: Sequencing – blastn matches from GenBank
28% (1)
Recognized by sight
Used references: Sequencing – blastn matches from GenBank
83% (1)
Eye3 Eyes3
Recognized by sight: sterile base “stalk” brighter yellow than buff-yellow upper hymenophore (see 2nd photo especially)
Used references: How to know the non-gilled fleshy fungi (H. V. Smith & A. H. Smith 1973) pg 76 (Clavaria key)
Based on microscopic features: Spore size and shape (narrower than length)

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
No one has commented yet.

Created: 2015-09-08 13:49:29 CDT (-0400)
Last modified: 2018-01-01 21:18:59 CST (-0500)
Viewed: 69 times, last viewed: 2018-03-18 08:02:15 CDT (-0400)
Show Log