In descending order, by date published.
Cannabis sativa is a summer annual plant that is strongly photoperiod-sensitive (flowers according to day length/photoperiod; not physiological maturity). It is mostly dioecious in that male and female flowers occur on separate plants (i.e. there are both male plants and female plants). However, there are also several monoecious commercial varieties (male and female flower parts on the same plant). Different plant parts are harvested for specific purposes, and modern day hemp may be produced for one or more purposes. Depending on the harvestable component of interest, (i.e. fiber, grain or cannabinoids) male plants and/or pollen might be vitally necessary or completely unwanted.
Authors: Richard Barnheisel, Mike Barrett, Morris Bitzer, Bill Bruening, Lowell Bush, Dottie Call, Mike Collins, Mark Coyne, Maelor Davies, David Ditsch, Charles Dougherty, Dennis Egli, Don Ely, Larry Grabau, J.D. Green, John Grove, Jimmy Henning, Jim Herbek, Don Hershman, John Johns, Doug Johnson, Fred Knapp, Garry Lacefield, Eugene Lacefield, Bill Maksymowicz, Jim Martin, Lloyd Murdock, Gary Palmer, Bob Pearce, Todd Pfeiffer, Tim Phillips, Chuck Poneleit, A.J. Powell, Monroe Rasnake, Charles Slack, Scott Smith, Robert Spitaleri, Norm Taylor, Dennis Tekrony, Bill Thom, Charles Tutt, Dave Van Sanford, Ken Wells, David Williams, Bill Witt