Alphabetical list of algal images (no thumbnails, for fast loading), with brief descriptions.
[NB. IDs have been checked against "The Freshwater Algal Flora of the British Isles":
however some older IDs using "How to Know the Freshwater Algae" (Prescott) do not appear in FAFBI, and are marked "Prescott".]

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  Mallomonas sp.   1 
unicellular chrysophyte: flagellate with silica scales L. Conailbhe
Loch an Eilein
  Mallomonas caudata   1   Millport resr.
  Mallomonas heterospina  1   Lily Loch
  Massartia  1
unicellular dinoflagellate: L.Tallant
Loch an Eilein
  Mastogloia elliptica  1 Diatom, sometimes in colonies within a mucilage coat Lismore
  Melosira varians  1   2 filamentous Diatom: similar to Aulacoseira, has cylindrical cells linked by spines.
Douglas Water
R. Yarrow
  Merismopedia  1   2  3  4  5  6 colonial Cyanobacterium (coenobium): spherical blue-green cells in multiples of 4 arranged in flat sheets in a square formation L. Chon
Kilchiaran lochan
Loch Trool
  Merismopedia elegans  1 L. Gorm
  Merismopedia tenuissima  1 Lismore
  ?Mesotaenium sp. 1 2  3 4(dividing)  'Saccoderm' desmid; has a single chloroplast: this example has 4 longitudinal ridges which is not reported in FAFBI. The cells were found in dense mucilage adhering to moss on a greenhouse roof. greenhouse, Shewington
  Micrasterias (link to illustrated list) unicellular Desmid: semicells are divided by several deep incisions.  
  Micrasterias americana  1  2   SCO366
Camphill reser.
  Micrasterias crux-melitensis  1  2     L.Tallant
Lower L.Glenastle
  Micrasterias fimbriata 1  2  3  4   5   lower L. Glenastle
  Micrasterias jenneri  1  1    R. Creran
  Micrasterias papillifera   1  2 3   L. Chon
  Micrasterias pinnatifida  1   L.Tallant
  Micrasterias radiosa  1  2 3  4  5  6   L. Chon
L. Skeen
Loch Gearach
  Micrasterias rotata  1 2   lower L. Glenastle
Loch Gearach
  Micrasterias thomasiana v. notata
 1  2  3  4
  L. Chon
Lower L.Glenastle
  Micrasterias truncata  1     L. Chon
  Microcrocis geminata  1 colonial Cyanobacterium: cells look similar to Merismopedia, but are clustered randomly. Ardnave L.
  Microcystis 1   2   3  4  5 colonial Cyanobacterium: many small cells randomly arranged in colonial mucilage without definite shape. Gas vacuoles may be present, when this alga is forming a bloom. L. Tallant
R. Creran
Millport resr.
  Microcystis aeruginosa 1   2   3   4   5 L. Gorm
Ardnave L.
Millport Resr.
  Microcystis flos-aquae 1   2   3   4   5  6 L. Gorm
L. Chon
Millport Resr.
L. Ballygrant
  The genus Microspora with descriptive notes filamentous Chlorophyte: unbranched, with a net-like chloroplast and barrel-shaped cells. The cell wall is made up of H-pieces, which can be seen at the ends of filaments (but do not confuse with broken cells eg. in Ulothrix), or the joins may be seen mid-way along a cell.  
  Microspora spp.    
  Microspora 8Ám.   1    Loch Trool
  Microspora 11Ám.  1 2   Shewington
  Microspora 16Ám. 1   Camphill Resr. 
  Microspora 17Ám. 1 2 3   Cowieslinn
  Microspora 20Ám. 1  2 3  4 5  6 7   Islay
R. Yarrow
  Microthamnion  1   2 3 filamentous Chlorophyte: quite a small plant, frequently branching with parietal plate choroplasts Shewington
  Mischococcus confervicola   1   2   3
colonial Chlorophyte: spherical cells in linear groups of 4 at the ends of branching threads Shewington
  Monoraphidium arcuatum ?1  2   Bemersyde
  Monoraphidium contortum ?1 unicellular Chlorophyte, slender cells pointed at both ends Bemersyde
  Monoraphidium komarkovae ?1   Bemersyde
  Monostroma   1 colonial chlorophyte forming a single-layered flat plate of cells Ravenglass
  The genus   Mougeotia   in culture, with descriptive notes. (species can not be distinguished without details of reproduction being known: see table for possibilities based on dimensions) filamentous Chlorophyte: unbranched* with cylindrical cells containing an axile ribbon-like chloroplast which can orient itself relative to the light; frequently seen twisted in different planes. Pyrenoids readily visible.
*short rhizoid-like branches of 1-2 cells may sometimes form.
  Mougeotia 5Ám.  1   2   L.Chon
  Mougeotia 8Ám.  1   2   3**  4   5   6  7   8  9 ** examples of aberrant chloroplast morphologies R. Claggain
L. Tallant
  Mougeotia 11Ám.   1  2  3 4   R. Claggain
Lochan an Daimh
L. Chon
  Mougeotia 12Ám.   1   L. Chon
  Mougeotia 14Ám.   1 2 3 4  5   R. Claggain
L. Chon
  Mougeotia 16Ám.   1  2   Millport resr.
  Mougeotia 20Ám.   Loch an Eilein
  Mougeotia 22Ám.  1 2   Comer Burn
L. Chon
  Mougeotia 25Ám.   1 2  3   Shewington
L. Chon
  Mougeotia 28Ám.  1   Bemersyde
  Mougeotia 32Ám.  1 2  3 4  5 6  7 8  9 10  11  12   L. Osgaig
Loch an Eilein
  Mougeotiopsis  1 2  3 4 5 6  7  7 filamentous Chlorophyte: unbranched* with cylindrical cells containing an axile ribbon-like chloroplast which can orient itself relative to the light; frequently seen twisted in different planes; no pyrenoids Lochan an Daimh
L. Chon
Loch an Eilein Camphill resr
R. Creran
Lily loch, Islay



John Kinross