• Lempholemma botryosum (A.Massal.) Zahlbr.
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Lempholemma botryosum
© Mike Simms
Lempholemma botryosum
© Mike Simms
Lempholemma botryosum
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This almost black, minutely tufted lichen with cylindrical lobes occurs where there is periodic wetting of hard calcareous rock. The habitats most favourable for this species are the water-filled depressions in limestone pavement; these act as catchment sites. As water slowly evaporates from these basins, the tiny cushions (0.5-3mm diam.) dry out, sometimes becoming very brittle, a phenomenon also seen in the ‘jelly lichens’ Collema. As there are several lookalikes, a candidate specimen will require close attention. In L. botryosum the ends of the lobes should appear hardly swollen. Western Ireland on natural limestone.

Key characteristics

  • Green-black, minutely tufted, cushion-forming, rubbery-gelatinous species of watery depressions in limestone rock
  • Thallus is a bundle of cylindrical lobes, the exposed end hardly swollen.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Lempholemma botryosum (A.Massal.) Zahlbr.. [In] LichenIreland. Accessed on 2018-08-15.