1968 Original Soviet Vintage Large Biology School Chart "MODIFICATION VARIABILITY IN PLANTS" Paper On Linen, USSR Mid Century Educational Poster, Leaves

Original mid-century biology school chart “MODIFICATION VARIABILITY IN PLANTS" printed in Leningrad, USSR, in 1968. Teaching aid from the collection of a retired Ukrainian teacher. Paper on linen.
🇺🇦 Proceeds to Support Ukraine 🇺🇦

Top row of leaves: 
Cherry laurel leaf sizes of the same age from the same tree. 
Bottom row:
Leaf shape of yellow Acacia
Variation Curve
Graphical method of studying variability

SIZE:
96 x 67cm

CONDITION:
Good clean vintage, natural patina. Please enlarge photos for details. Light water marks.  Labelled in russian cursive at the back by the teacher.

Ships rolled up, unframed.
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