Loch Niarsco

Yesterday I went to Loch Niarsco to update Elatine hexandra (Six-stamened Waterwort) and Subularia aquatica (Awlwort) records – successfully. I also found Sparganium erectum (Branched Bur-reed) but no sign of the Iris pseudacorus (Yellow Iris) recorded there by the NCC Loch Survey in 1989, which leaves me a little suspicious. I ended up trying to swim in the bog to inspect the Sparganium, only to find another patch within easy reach a few minutes later.

Overall I recorded 142 species in NG34Y, increasing the tetrad count from 49 to 156 and one record, for Potentilla sterilis (Barren Strawberry), was the first record in NG34 since 1995.

A lot of the washed-up Isoetes lacustris (Quillwort) was unusually curled:

Curly Quillwort

Curly Quillwort

There were Black Darters (Sympetrum danae) and larvae of Northern Eggar and Broom Moth.

On the way I went to look for Mentha x verticillata (Whorled Mint) beside the River Varragill south of Portree (successfully) and by the River Snizort near Skeabost Bridge (unsuccessfully). The problem with the latter site was that both parents were present, Mentha aquatica (Water Mint) in huge quantities, Mentha arvensis (Corn Mint) rather less so, making it very hard to find any hybrid plants – especially when it was all quite grazed.  The R. Snizort did have a nice Whooper Swan on it:



I collected a couple of Mentha specimens from Portree and Sligachan. One of these populations has been recorded as Mentha x rotundifolia (M. longifolia x suaveolens) in the past and they could both well be that, but I find the far end of Stace’s Mentha key where this plant keys out to be unusable, so I shall send specimens away to the Mentha referee.

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