Collema fragile
A rather small (to 2cm diam) jelly lichen that occurs on carboniferous limestone in Wales forming irregular and incomplete rosettes. Being in the genus Collema it lacks a cellular cortex. The thallus also lacks longitudinal ridges but the older parts of the lobes become rugose and become covered in numerous globose isidia and with whitish pubescence around the edges of the most actively growing lobes. Apothecia are rare but are reported once from the Gower.
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Photo: Alan Orange (scale = 1mm)
Resembles Lempholemma botryosum but that has unicellular spores. Small Leptogiums have a cellular cortex and Collema parvum lacks the whitish pubescens on the lobe tips.
| Location | Grid Reference | Last Rec'd | Recorder | SSSI |
| Anglesey: Bwrdd Arthur, Llanddona | SH5881 | 2002 | S.P. Chambers | Yes |
| Caernarvonshire: Gt Orme's Head | SH7562784426 | 2006 | V. Giavarini | Yes |
| Denbighshire: Rhyd y Foel, Llanddulas | SH906769 | 1995 | A. Orange & R.G. Woods. | Yes |
| Glamorgan: Mewslade, Gower | SS422873 | 1997 | A. Orange | Yes |
| Glamorgan: Richard's Rock, Mewslade, Gower | SS4227987401 | 2011 | R.G. Woods & T. Wilkins | Yes |
| Glamorgan: SE-facing cliffs, Mewslade, Gower | SS4218387365 | 2011 | R.G. Woods & T. Wilkins | Yes |
| Pembroke: Lydstep Point | SS0997 | 2004 | S.P. Chambers | Yes |
| Pembroke: Stackpole | SR9720993119 | 2007 | B. Edwards | Yes |
| Pembroke: Broadhaven Cliffs, Stackpole | SR9771194340 | 2011 | R.G. Woods & T. Wilkins | Yes |
There are earlier records from Stackpole, Pembs, the Great orme, Caerns. and the Little Orme, Denbighshire the details of which have yet to be located.
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