Lathagrium auriforme

Jelly Lichen

Lathagrium auriforme, one of the Jelly Lichens. Flattish appearence when dry, swelling to a thicker form when wet. Reproduction by means of vegetative isidia. Isidia are complete packages of both fungal and algal elements and appear as finger-like projections from the thallus. Growing here on hard limestone with another black lichen, Verrucaria nigrescens.

1 / 6

Lichen on limestone

2 / 6

Lichens on limestone

3 / 6

Jelly form

4 / 6

Thallus with isidia

5 / 6

Isidia

6 / 6

Isidium squash

❮ ❯

Photograph detail

Slide 1: Lathagrium auriforme, Jelly Lichen. Dry. Growing on a south facing limestone quarry face. Redmire Quarry. July.

Slide 2: Lathagrium auriforme, Jelly Lichen. Dry. Growing on a south facing limestone quarry face with the smoother, black lichen, Verrucaria nigrescens. Redmire Quarry. July.

Slide 3: Lathagrium auriforme, Jelly Lichen. Growing on a south facing limestone quarry face. Showing thallus form when fairly dry. Redmire Quarry. July.

Slide 4: Lathagrium auriforme, Jelly Lichen. Dry. Showing reproductive projections called isidia. Redmire Quarry. July.

Slide 5: Lathagrium auriforme, Jelly Lichen. Wet. Showing reproductive projections called isidia. Green colour caused by embedded algae. Redmire Quarry. July.

Slide 6: Lathagrium auriforme, Jelly Lichen. Wet. Squash of an isidium. Photographed at x400, brightfield illumination. Collected from Redmire Quarry. July.