Here are more photos showing close-ups of the flowers and the tall and short varieties. There seems to be no difference between the flowers of the tall var and the shorter ones with regard to size and colour.
Pic #5 - My grand daughters with the dwarf var . The older girl is 5' tall
Pic #6 - My wife with the tall var. She is also 5' tall.
Pic #7 - Dark coloured variety
Pic #8 - Lighter coloured variety with a well-camouflaged spider in the throat.