Staminate Flower Top
Shore of Red Deer River near Hudson Bay, SK
There are five sepals and no petals. The anther is composed of two thecae, each theca containing two pollen sacs. The pollen is released through an expanding pore which first erupts distally and then expands proximally and longitudinally along the boundary between the two pollen sacs. Thus the anthers dehisce basipetally and longitudinally. The line of dehiscence is called the stomium. Note the golden glands along the boundary between the two thecae.
Cannabinaceae: Answers to key questions in Budd's Flora leading to this family.