Transmitted Oblique Off Circular Polarized Light Illumination
The sporangium is the capsule in which the fern spores mature and the mechanism that then disperses them into the air.
The two ends of the sporangium form the "bag" in which the spores mature. The sporangium is attached to the underside of
the fern leaflet by the fibrous sporangiophore. When the spores are mature the sporangium releases the spores forcefully
by snaping open.
Deer Fern, Blechnum spicant, is found in moist, maritime Northwest forests of North America and occasionally inland.
Significance in the Environment
The spores and sporangia are released in June to August.
Click here for images of over 15,000 pollens and spores.
Mickel, John T., 1979. HOW TO KNOW THE FERNS AND FERN ALLIES, Dubuque, Iowa. Wm. C. Brown.