Sunflower Botanical Poster – Helianthus annuus

The Evolution Store has obtained a series of German educational charts that were originally illustrated in the 1950s and ‘60s and continue to be produced by the same printer. This printer has been internationally recognized for producing scientifically accurate educational charts since 1929.

These charts have been reissued using the original film and the same methods as the first printing. They are printed without inscription for university study and esthetic purposes with special attention paid to anatomical detail and accuracy.

The Evolution Store offers posters with and without wooden dowels!

Key

Fig. 1 – Total view of the over ground plant.

Fig. 2 – Longitudinal section through inflorescence (schematic).

Fig. 3 – Tubular flower in different stages of development, longitudinal cuts through corollas.

a) Bud-stage.

b) Tube of stamens with pollen.

c) Pollen pushed out by brush of the style (sporophyle generation).

d) Enfolded lobes of the sigma (gametophyle generation).

e) Withering flower after pollination, palea delineated only in a) and b).

Fig. 4a) – Single seed.

Fig. 4b) – Longitudinal section of seed.

Fig. 5 – Mature receptacle of seed.