Isidium

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A herbarium specimen of the lichen Leptogium cyanescens, magnifed 40X, with lobule-shaped isidia.

An isidium is a

columnar structure, and consisting of both fungal hyphae (the mycobiont) and algal cells (the photobiont). They are fragile structures and may break off and be distributed by wind, animals, and splashing raindrops.[1] In terms of structure, isidia may be described as warty, cylindrical, clavate (club-shaped), scale-like, coralloid (coral-shaped), simple, or branched.[2]

Examples of isidiate lichens include members of the genera Parmotrema and Peltigera.

C. palmicola photographed through a dissecting microscope (x40) showing isidia.

See also

Soredium

References

External links