Tag Archives: Acer rubrum (red maple)
Two common forms of venation that are the starting point for many plant identification systems are palmate and pinnate. A third venation pattern is fan-shaped, as in gingko trees… A fourth form, arcuate, has a strong midrib, but also curved secondary veins in a more heart-shaped arrangement. The parallel venation of a fifth form appears in most monocot plants. Continue reading
In some plants, the pericarp of an achene extends into a papery, wing-like tissue longer than the seed. This fruit is called a samara. The wings enable the wind to carry the seeds farther from the mother plant than wingless seeds.
When you hear the word achene, you may think of the seeds of sunflowers. Although many botanical works still refer to the fruits of Asteraceae (commonly called the aster, composite, daisy, or sunflower family) as achenes, some botanists consider them to be cypselae. Continue reading