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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  Palmodictyon viride 1   2   3   4   5
colonial Chlorophyte: spherical cells in branching tubes of mucilage, with cup-shaped chloroplast Ard catchment
  Pandorina   1 2
colonial Chlorophyte (flagellate): spherical / oval colony with cells crowded, pyriform; 2 flagella from each cell projecting through mucilage sheath. Colony motile in a tumbling, rolling motion. Millport
Kilchiaran lochan
  Paulschulzia tenera1  2  3  colonial Chlorophyte:cells/cell groups in clearly defined spherical mucilage envelope, with individual sheaths and flagellum extending beyond outer envelope Duddingston Loch

Pediastrum sp.  1


colonial Chlorophyte: cells angular, crowded together to form a flat disc, cells in outer layer usually ornamented with protuberances, some species have spaces between cells in the middle of the disc. L. Tallant
  Pediastrum angulosum  1  2 3 4  5 6  7   Kindrogan pond
Loch Dhomhnuill
L. Gearach
  Pediastrum boryanum  1 2 3 4 5 6 7 8 9   Tallant
Loch Dhomhnuill
Kilchiaran lochan
R. Yarrow
  Pediastrum boryanum v. cornutum  1 2 3 4   Kindrogan pond
Loch Dhomhnuill
R. Yarrow
  Pediastrum boryanum v. longicorne  1 2   Ardnave L.
Kilchiaran lochan
  Pediastrum duplex  1   Millport
  Pediastrum duplex v. rugulosa  1 2   Millport
  Pediastrum tetras 1  2  3   Millport
Kilchiaran lochan
L. Gearach
  Penium exiguum   1 
Penium margaritaceum  1
unicellular Desmid (Placoderm): cylindrical with rounded ends, cell wall granular, 1 chloroplast in each semicell (sometimes interrupted in P. margaritaceum). Loch Trool
L . Conailbhe
  Phacus  1  2 3  4 5 unicellular Euglenophyte: somewhat pear-shaped with an apical process, pellicle marked with striations; motile by means of a flagellum, many chloroplasts. Shewington
L. Chon
  Phacus caudatus 1   Bemersyde
  Phacus pleuronectes 1  2   Bemersyde
  Phaeosphaeria 1 Chrysophyte ("Golden Algae"); spherical cells with a golden-brown chloroplast in a tubular or net-like colonial mucilage.  
  Phormidium 5Ám  1 filamentous Cyanobacterium: smooth-walled filament composed of short cells, non-motile, grey, brown or blue-green colour; with a thin sheath, forms dense mats or films with a slippery texture Traquair
  Phormidium 9Ám  1   Millport

Phormidium 12Ám  1


  Pinnularia   1  unicellular Diatom: Pinnularia spp. have very distinct, feather-like frustule markings Lochan an Daimh
  Pinnularia maior 1 R. Yarrow
  Pinnularia nobilis  1 SCO067
  Pinnularia ?viridis  1 L. Chon
  Pleurotaenium coronatum  1 2  3 unicellular Desmid (Placoderm): long somewhat cylindrical cell divided into 2 semicells, some spp. with inflated regions near the centre and varied markings on the end faces. L. Fada
lower L. Glenastle
Loch an Eilein
L. Gearach
  Pleurotaenium trabecula  1 2 5 Hidden Lochan
L. Conailbhe
lower L. Glenastle
  Pleurotaenium ehrenbergii  1 L. Chon
  Porphyridium 1  2 unicellular Rhodophyte, found on damp soil Shewington
  ?Protoderma 1 2 Chlorophyte: filamentous, but forms a flat colony of touching filaments on surfaces. Parietal chloroplast. Shewington
  Pseudanabaena  1 2 filamentous Cyanobacterium: very small cell diameter (approx. 2µm), beaded appearance as cells slightly separated from each other Shewington
  Pseudokirchneriella subcapitata  1  2
(formerly'Raphidocelis subcapitata' previously "Selenastrum capricornutum" )
Chlorophyte: unicellular or sometimes as coenobia of 4, 8, etc. Cells elongated, spindle- or half-moon shaped (hence the older name); parietal chloroplast. culture
  Pseudoquadrigula 1 colonial Chlorophyte (coenobium): cigar-shaped cells lying in groups of 4 within a globular mucilaginous sheath. Loch an Eilein


  Quadrigula closterioides  1 2 colonial Chlorophyte (coenobium): cigar-shaped cells lying in parallel groups of 4 within a globular mucilaginous sheath. (cells in all groups lie parallel, distinguishing it from Pseudoquadrigula) L. Gorm
L. Chon
  Quadricoccus verrucosus  1 2 colonial Chlorophyte (coenobium):oval cells in groups of 2-4 within a mucilage envelope. Cells are smooth or covered with granules Ardnave Loch


  ? Radiococcus nimbatus  1   2  3 colonial Chlorophyte, spherical cells in a (usually) spherical mucilage sheath with radiating fibrils R. Creran
  'Raphidocelis subcapitata'  1  2
(formerly "Selenastrum capricornutum", now Pseudokirchneriella subcapitata)
Chlorophyte: unicellular or sometimes as coenobia of 4, 8, etc. Cells elongated, spindle- or half-moon shaped (hence the older name); parietal chloroplast. culture
  Rhoicosphenia curvata  1   2 heteropolar Diatom: curved, usually attached  
  ?Roya (?obtusa)   1 2 3  'saccoderm' desmid: elongated cylindrical cell with rounded ends, usually slightly bent (this example is rather shorter than usual). The single chloroplast has a notch in the middle . greenhouse


John Kinross