Plant Systematics and Evolution, Vol. 191, No. 3/4 (1994), pp. 147-160 (14 pages) Sexual reproduction is the main reproduction mechanism among the 14 wild Iberian taxa of Lactuca, Prenanthes, ...

Robert W. Cruden, Robert M. Lloyd, Embryophytes have Equivalent Sexual Phenotypes and Breeding Systems: Why Not a Common Terminology to Describe Them?, American Journal of Botany, Vol. 82, No. 6 (Jun.