Thistle Flower Anatomy. Abdomen 3 - Wings - venation. The flower heads of the Canada thistle appear as the shape of an umbrella.
This thistle produces a lot of seeds that have small feathers and are fixed to the base by means of a ring until they mature. The roots of this plant are taproots. The leaves are various in size oblong in length and at least three to five times the width of the leaf.
This is a perennial species of thistle and can reach up to 15 m in height if you let it.
Scales 4 - Wing scales - scanning electron microscope images 5 - Hearing organs flight thermoregulation Wings A female Brimstone Gonepteryx rhamni seen here. Scales 4 - Wing scales - scanning electron microscope images 5 - Hearing organs flight thermoregulation Wings A female Brimstone Gonepteryx rhamni seen here. The main stem of this wild edible is firm and thorny. 17112015 Bull Thistle Identification and Management.