< Back | A to Z Index | Tools | Search | Home
Hemp
Family, Genus: Cannabaceae, Cannabis sativa
| Size | 22 - 26 um | |
| Shape | suboblate to oblate | |
| Exine | about 1 um thick | |
| Intine | relatively thin, much thickened oncus | |
| Pores | 3 (-4) porate, slightly aspidate, with oncus below | |
| Sculpting | granular | |
| Bloom Period | June - September | |
| Allergenicity | Specifically allergenic, mid to late summer inhalent allergies, causes a type of severe bronchial asthma |
Thumbnails:
Dr. M. Davis images:
References:
Bassett, John, Clifford Crompton and John Parmelee. An Atlas of Airborne Pollen Grains and Common Fungus Spores of Canada. Canada Department of Agriculture, 1978.
Jelks, Mary, M.D. Allergy Plants that Cause Sneezing and Wheezing. World Wide Printing, Tampa, 1986.
Kapp, Ronald O. Pollen and Spores, Second Edition. The American Association of Stratigraphic Palynologists Foundation, 2000.
Lewis, Walter H., Prathibha Vinay and Vincent E. Zenger. Airborne and Allergenic Pollen of North America. The Johns Hopkins University Press, Baltimore and London, 1983.
page created by: Brian Hoffman