What is a species?
ìA natural group of plants composed of similar individuals which can produce similar offspring, usually including minor variations.î - Michael Dirr
ìThe primary or fundamental concept in the under-standing of the forms of life; the basic unit of classifi-cation.î - from Hortus Third
ìPlants of one kind.î - from How to Identify Plants
A reproductively isolated population of plants.î