its got great colour!
Im not sure if your question is about whether or not they should be two varieties as opposed to just being no distinction, or if you meant they should be two different species? In anycase,
Form the Inernational Code of Botanical Nomenclature.
Three conditions must be met to have different species
1) Species must differ from their closest neighbors (or relatives) in at least two characteristics
2) Species must differ in geographical distribution
3) Species must differ in ecological distribution. (example: sun, shade, wind, climate).
Subspecies differ in one or two of the above
Usually growing in a different geographical location.
Varieties differ in minor yet definable characteristics, from the rest of the species. A variety can be made because it differs or varies within a geographical and/or ecological unit, generally not determined simply because a group of plants are a different colour.
Forma (forms) often are made due to some pecularity, ex changes in colour or size. These plants may not breed true or sometimes are sterile.
__________________
"We must not look at goblin men,
We must not buy their fruits:
Who knows upon what soil they fed
Their hungry thirsty roots?"
Goblin Market
by Christina Georgina Rossetti
|
Linear Mode
