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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A B C D E F G H K L M N O P Q R S T U V W X Z
|Geminella 1 2 3 4 5 6 7 8 9||filamentous Chlorophyte:cells usually in pairs within a mucilage sheath, with a parietal band chloroplast.||Hidden
|Glaucocystis 1||Eucaryotic cell with blue-green cyanelles (normally ribbon-shaped) instead of chloroplasts.||Lower L. Glenastle|
|Gloeocapsa 1 2|| colonial
Cyanobacterium: cells in a lamellate mucilage,
growing attached to surfaces
2 3 4
5 6? 7
Gloeocystis vesiculosa 1 2 3 4 5 6 7 8 9
|colonial Chlorophyte: oval or spherical cells in concentrically layered mucilage, chloroplast cup-shaped.||Shewington
|?Gloeotila subconstricta 1||filamentous chlorophyte||Loch Gearach|
||colonial Cyanobacterium: tapering filaments with a basal heterocyst, attached to surfaces, vegetation, etc., forming a subspherical tuft||SCO172|
|Gomphonema acuminatum 1 2 3||Diatom: elongated cells, attached to surfaces by a branched stalk, cells broader at distal end.||Shewington
|Gomphonema subtile 1||R.Yarrow|
|Gomphonema truncatum 1 2 3 4||Shewington
|Gomphosphaeria 1 2 3||colonial Cyanobacterium:cells usually seen as heart-shaped, in mucilage at the end of branching stalks.||L. Tallant
|Gomphosphaeria aponina 1 2 3 4||Lower
|Gonatozygon kinahanii 1 2 3 4 5||filamentous Desmid: elongated cells usually in pairs joined end-to-end, ends slightly swollen, cell surface decorated, chloroplast axile.||Millport
|Gonatozygon monotaenium 1 2 3 4||SCO140
Lochan an Daimh
|Groenbladia neglecta 1||filamentous Desmid|
|Gymnodinium aeruginosum 1||Pyrrophyte with blue-green cyanelles||Loch Gearach|
|Gyrosigma acuminatum 1 2 3 4 5 6 7 8||Diatom: sigmoid, tapering shape||L.Gorm
|Gyrosigma attenuatum 1||Algarve,Portugal|
|Gyrosigma ?spencerii 1 2||Algarve,Portugal|
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|Haematococcus 1 2
||unicellular Chlorophyte: common in bird-baths; green or red flagellate cell in vegetative state, but forms red spherical cysts when the habitat dries out.||Shewington|
|Hannaea arcus 1 2||Diatom:
banana-shaped frustule with capitate ends.
|Hapalosiphon 1 2 3 4||filamentous Cyanobacterium: main axis has branches arising at right angles, cells blue-green, sometimes forming more than 1 series; sheath may be darkened||SCO172
|Haplotaenium minutum 1 2||Desmid: straight baton-shaped cell with a median constriction but no basal inflation (unlike Pleurotaenium), 1 ridged chloroplast in each semicell||L. Chon|
|Heterococcus viridis 1||filamentous Xanthophyte: branched filament, cells with numerous bright green plate-like chloroplasts||SCO379|
|Homoeothrix 1 2 3 4 5 6 7||filamentous Cyanobacterium: sheathed, tapering trichome, false branching, no heterocysts (cf. Tolypothrix)||SCO076|
|The genus Hormidium , with descriptive notes||filamentous Chlorophyte: long unbranched filaments which tend to kink frequently: cells square- to long-cylindric with a (usually) disc-shaped chloroplast which wraps round about half the cell circumference and nearly as long as the cell, otherwise very similar to Ulothrix.|
|Hormidium (Klebsormidium) 1 2 3 4 5 6 7 8||Comer
|Hormidium subtile 1||Ardnave L.|
|?Hormotila mucigena 1 2 3 4 5 6||filamentous Chlorophyte: cells at the end of or at intervals along the length of branching mucilage tubes; the tubes may be featureless or show layering. Chloroplasts net-like: this is not evident in these pictures.||greenhouse|
|Hyalotheca dissiliens 1 2 3 4 5 6 7 8 9||filamentous Chlorophyte (Desmid):cells have a median incision, giving the filament an uneven appearance: single stellate chloroplast; the filament can sometimes be seen to have a wide mucilage sheath with radiating fibrils.||Stac Pollaidh
Loch an Eilein
|Hyalotheca mucosa 1||R.Creran|
|Hydrodictyon 1 2 3 4 : inspiration for the 'Algal Web'||colonial Chlorophyte: cylindrical cells are linked at each end to 2 others to form a net-like structure; each cell grows larger and eventually a smaller net forms inside.||Bemersyde
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|Kirchneriella 1 2 3
||colonial Chlorophyte: small, crescent- or comma-shaped cells in small groups within a mucilaginous sheath||L.Gorm
|Kirchneriella aperta 1
|Klebsormidium (Hormidium) 1 2 3 4||filamentous
Chlorophyte: long unbranched filaments which tend to kink frequently:
cells square- to long-cylindric with a (usually) disc-shaped chloroplast
which wraps round about half the cell circumference and about as long
as the cell, otherwise very similar to Ulothrix.
|Klebsormidium crenulatum 1 2 3||Ard Catchment
|Korshikoviella mikhailovskoensis 1 2 3 4||Spindle-shaped green cell, frequently attached at one end with a spine at the other, with a segmented chloroplast.||Dunfermline SUDS|
L BACK TO TOP
|Lemanea 1 2 3 4 5 6 7 8 9 10 11||filamentous Rhodophyte: grey, olive-green or brown in colour, multiseriate, branching may be infrequent, but filaments are tapering with swollen nodes at intervals. Cells angular with disc-shaped chloroplasts.||Meldons
Cyanobacterium:sheathed, unbranched, no heterocysts, forms hormogonia
(short filaments) which can escape from the thin sheath and may show motility.
cf Oscillatoria: motile but no sheath, and Phormidium: sheaths
form a mat. Trichome (filament not including sheath) colour ranges from
olive green to brown or black; sheath colourless or brown when older.
L. aestuarii is a brackish-water species: the examples shown came from water with a salinity value of 9.
(cf. seawater = salinity ~35)