|
Click here to view the slide show! → Onagraceae (Requires RealPlayer)
Evening Primrose (Oenothera biennis) is a tall sturdy plant that belongs to Onagraceae family. Its bright lemon-yellow flowers open in the evening and its Japanese name is the-(small)-plant-that-waits-for-the-evening, or (me)-matsu-yoi-gusa. The flower has four petals, four sepals, four divided stigma and eight stamens. The flower is mostly 4-5 cm in size.
← Click to enlarge
The plants that belong to this Onagraceae family have distinctive characteristics in the form of pollens and the phleom. The photo shows the pollen grains of the evening primrose flower. The string like structure called viscin threads connects each pollen grain. The next photo shows the close-up of the pollen grain and the viscin threads attached to it.
← Click to enlarge
Another distinctive characteristics of the Onagraceae family is the phloem that circles inside the xylem, or intraxylary phloem.
← Click to enlarge
← Click to enlarge
Butterfly Gaura (Gaura lindheimeri) is another Onagraceae plant. The flower has four petals, four sepals, four divided stigma and eight stamens. The pollens are triangular and the grains are entangled in viscin threads.
↑ Click to enlarge