Saturday, February 02, 2008
Tree Geometry: Parallel Lines
In Heinrich's drawing of the hop hornbeam twig, counting from the bottom the second and fourth segments are nicely parallel, the first and third less so:
The trees in which these parallel twig segments have been noticed (European hornbeam, American hornbeam, yellow birch, hop hornbeam) are all members of the family Betulaceae.
From western Maine, Beth writes appreciatively and perceptively about another book by Bernd Heinrich, A Year in the Maine Woods.