Licea clarkii Ing

Fructification
Sporocarps hemispherical, sessile on a broad base or somewhat constricted at base, ca. 0.2-0.5 mm Ø, dark brownish olive, solitary or in small groups.

Hypothallus
Inconspicuous, not seen.

Peridium
Peridium membraneous, rather tough, pale to medium greyish yellow by TL, on the the inside with regularly distributed, minute warts, with much refuse matter on the outside, dehiscing by a ± sharply defined lid leaving a small, low cup-like structure.

Spores
Spores almost black, with a slight olive tint by RL, pale to medium yellowish grey by TL, very delicately, densely and regularly warted (much like peridium), some spores with a lighter area, globose, 11-12.22-14 µm Ø (n=25)

Ecology
On dead twigs of Rubus fruticosus (coll.), but also reported from other substrates (f.ex. see Müller (2008)).

Distribution in Denmark
Unknown. So far only one find, but this inconspicuous species is probably more widespread.

Global distribution
Reported from Great Britain, Ireland, Gemany and Lithuania. A report from Hawaii (Eliasson (1991)) have proved to belong elsewhere in the genus.

Discussion
The Danish collection was found during an initial inspection of dead twigs of Rubus collected for moist chamber culture. The sporocarps are difficult to see in the field, but already opened sporocarps may be detected by a hand lens as small 'craters' on lighter parts of the substrate, not to be mistaken for perithecia of dead pyrenomycetes.
The species should probably be sought for particularly during mild winter months.

Description
Description and discussion based on the only Danish collection: hfg 2450, Denmark, Sjæll., Ryvangen.

 


Abbreviations: TL : transmitted light; RL : reflected light; Ø : diameter; TBU : Danish Botanical Topographical District.

Colour-codes refer to: Kornerup, A. & J. H. Wanscher 1974: Farver i farver. 5th reprint. Politikens Forlag, Copenhagen.

When not otherwise indicated spore measurements are given as: min-mean-max or (extreme-)min-mean-max(-extreme). Spore measurements are exclusive of ornamentation.

Line drawings are free hand sketches.

Licea clarkii:
Licea clarkii Ing - Sporocarps (hfg2450)
Sporocarps (hfg2450)
Licea clarkii Ing - Spores (hfg2450)
Sporocarps (hfg2450)
Licea clarkii Ing - Part of peridium (hfg2450)
Sporocarps (hfg2450)