This year's Outer Hebrides Recording Houseparty is now underway and the first report is in from Paul Smith, County Recorder for the Outer Hebrides and Chair of BSBI's Records & Research Committee.
Over to Paul:
"Sparganium (Bur-reed) is a tricky genus, and many plants
cannot be identified when not in flower. So far we have had probable S.
emersum, S. erectum (image below), S.angustifolium (very common in
nutrient poor lochs) and S. natans (usually in richer sites).
The pic (above) shows Claudia photographing S. erectum in the Handay River on Barvas
Sands.
"Too early to do the subspecies yet, but at least the species is clear.
The possible S. emersum was in a river on the moorland, with floating
and strongly keeled, partly emergent, leaves. But without flowers it's hard to be
sure.
"Also on Barvas Sands are huge numbers of Gentianella
amarella, in its northern subspecies septentrionalis with creamy yellow
flowers (image below).
"There was no sign of G. campestris at this site. Two plants contained aberrant double flowers (but not consistently - only one flower on each affected).
"There was no sign of G. campestris at this site. Two plants contained aberrant double flowers (but not consistently - only one flower on each affected).
"It proved to be abundant but diminutive - only around 10cm tall - around quite a lot of the margin of Loch Arnol.
"Although it has only been recorded in one tetrad - NB34 - it was easy to extend this to NB24 as the loch straddles the boundary. It is most abundant where the margins are quite bare (as in the pic below left with Claudia, Sally & Mags), but also as more scattered plants among Carex nigra beds".
Many thanks to Paul for this report and for the images on this page. If you'd like to find out more about the species mentioned on this page, try the plant cribs on the ID page here and there is a full species account for G. campestris on this page.
To find out where the various plants grow, just type the scientific name into the taxon box on this page to generate a BSBI distribution map.