title: Preparation of a Floral Initiating Extract from Xanthium.
abstract: An extract from lyophilized tissue of flowering Xanthium (cocklebur) plants initiates floral development when applied to Xanthium test plants maintained on long-day photoperiodic conditions. Details of the preparation of the extract are described.
authors.forename: R G
authors.initials: RG
authors.lastname: Lincoln
authors.forename: D L
authors.initials: DL
authors.lastname: Mayfield
authors.forename: A
authors.initials: A
authors.lastname: Cunningham