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Tropic responses were examined in azalea Rhododendrom pulchrum and lily Lilium cv. ‘Casablanca’ flowers. Orientation of the flowers in these two species depicts several up/down characteristics, such as angle of the corolla opening, alignment or configuration of a specific petal at the top, plus direction in the curved tip of the pistil and stamen. Gravity was found to be the prime factor, with light...
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