440 For Yucca, shadowing is a purpose-built mechanism

img_20170214_174408571

Yukka like all plants seem to have evolved with geometric logic.

As each of its levels respond to light with slow-moving  open and close canopies.

its thick sword-like leaves, in their alternate rigid  layers, whilst shading their lower colleagues,

also accomplish a very effective light and shadow show by day and by night,

 

 

 

https://dailypost.wordpress.com/photo-challenges/shadow-2017/

© 2017 La Floralie 3

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