Pine growth cycle - elements, 5 specimens sunk in the material

MACHINE TRANSLATION (not authorised yet)

In the transparent plastic block there are 5 natural specimens representing 4 elements of the pine growth cycle and a pine needle:

1 - male inflorescence

2 - female cone (one-year-old)

3 - female cone (second year)

4 - seed

5 - needle

Block wrapped in a bubble pocket and placed in a lockable cardboard box. Teaching aid dimensions: 16.5 x 7.7 x 1.8 cm.