Remarks : | Introduced to the U.S. where it is considered an invasive species. "The petals are very sensitive, the flowers closing at once if the sky becomes overcast and threatens rain. Even in bright weather, the flowers are only open for a comparatively short time - never opening until between eight and nine in the morning and shutting up before three o'clock in the afternoon. As the petals are only brilliantly coloured on their upper faces, the flowers when closed disappear from view among the greenness of the leaves. " from Botanical.com
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