BSA Online Image Collection, Angiosperms - Magnoliophyta

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Coleus (dicot) SAM m.l.s. Alternanthera SAM Zea mays root m.l.s.  closed apical organization Zea mays RAM close-up
Coleus (dicot) SAM m.l.s. Alternanthera SAM Zea mays root m.l.s. Zeamays RAM close-up
       
Pisum sativum RAM open organization Pisum sativum RAM close-up Aristolochia vessel element; simple perforation plate Liriodendron vessel element; scalariform perforation plate
Pisum sativum RAM open organization Pisum sativum RAM close-up Aristolochia vessel element Liriodendron vessel element
       
Ephedra (Gnetophyta) vessel element; foraminate perforation plate Pine tracheids with circular bordered pits Liriodendron vessel element, showing elongate bordered pits Acer (maple) wood (secondary xylem), t.s.; vessels present
Ephedra (Gnetophyta) vessel element Pine tracheids with circular bordered pits Liriodendron vessel element, showing elongate bordered pits Acer wood (secondary xylem), t.s.
       
Drimys wood, t.s., no vessels, tracheids only Liriodendron wood, t.s., diffuse porous Quercus (oak) wood, t.s. ring porous Fraxinus (ash) wood, t.s., paratracheal axial parenchyma distribution
Drimys wood, t.s. Liriodendron wood, t.s., diffuse porous Quercus (oak) wood, t.s. ring porous Fraxinus (ash) wood, t.s., paratracheal axial parenchyma distribution
       
Liriodendron wood, t.l.s. multiseriate rays Liriodendron wood, close-up t.l.s.; scalariform perforation plate Drimys wood, radial l.s.; side view of ray in upper left corner Quercus (oak) wood, r.l.s., homocellular ray (all procumbent cells)
Liriodendron wood, t.l.s. multiseriate rays Liriodendron wood, close-up t.l.s.; scalariform perforation plate Drimys wood, radial l.s.; side view of ray in upper left corner Quercus (oak) wood, r.l.s., homocellular ray (all procumbent cells)
       
Liriodendron wood, r.l.s., heterocellular ray (upright cells on margins of ray, procumbent cells in center of ray) Clematis developing flower  stage II - tepals Clematis developing flower  stage III - stamens Clematis developing flower  stage IV  beginning of carpel initiation
Liriodendron wood, r.l.s., heterocellular ray (upright cells on margins of ray, procumbent cells in center of ray) Clematis developing flower – stage II - tepals Clematis developing flower – stage III - stamens Clematis developing flower – stage IV – beginning of carpel initiation
       
Clematis developing flower  stage IV  young carpels (airline seat  stage) Clematis developing flower  stage V  developing carpels Clematis developing flower  stage V  close-up  carpel development Lilium kelleyanum  flower (monocot)
Clematis developing flower – stage IV – young carpels (“airline seat” – stage) Clematis developing flower – stage V – developing carpels Clematis developing flower – stage V – close-up – carpel development Lilium kelleyanum – flower (monocot)
       
Lilium bud x.s.
Lilium bud  early anther development  PMC/microsporocyte stage PMC close-up Early prophase I
Lilium bud x.s. Lilium bud – early anther development – PMC/microsporocyte stage PMC close-up Early prophase I
       
Early prophase I close-up Late prophase I Late prophase I  diakinesis close-up Metaphase I
Early prophase I close-up Late prophase I Late prophase I – diakinesis close-up Metaphase I
       
Metaphase I close-up Metaphase II close-up Telophase II Tetrad stage of microspores
Metaphase I close-up Metaphase II close-up Telophase II Tetrad stage of microspores
       
Mature anther x.s. Stigma and style with pollen grains and tubes  l.s.
   
Mature anther x.s. Stigma and style with pollen grains and tubes – l.s.    

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