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Pitcher Plants Flowering

6-17-16  pitcher plant flower parts labeled 298Pitcher plants are known for their unique, insect-trapping leaves, but their flowers are just as unusual.  Their petals are a deep burgundy color and attract pollinating flies by looking like raw meat. The sepals, usually green structures that protect the bud and then become inconspicuous when the flower opens, are leathery and remain long after the petals fall off, well into winter.  The pistil, or female part of the flower, has a typical ovary at its base, where seeds are formed, but the style (stalk-like in most flowers) expands into a large, star-shaped umbrella. This umbrella becomes the lowest part of the flower as it droops downward in its early open stages and collects pollen that falls off of the anthers surrounding the ovary. The stigmas, where pollen must land in order for pollination to take place, are located on the five points of the star-shaped style, where visiting insects land.  A pitcher plant is designed to be pollinated by pollen stuck to the body of the insect before the insect descends onto the lower platform section of the style, where it crawls around gathering nectar, and inadvertently, pollen. (Photo:  Northern, or Purple Pitcher Plant, Sarracenia purpurea.)

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Showy Orchis Flowering

6-4-14 showy orchis 267A walk in deciduous woodlands at this time of year could result in the sighting of several species of orchids, one of which, Showy Orchis (Galearis spectabili), has a stalk of several flowers which typically bear lavender hoods (one variant is white). Potential pollinators, most of which are long-tongued bumblebees, butterflies, moths and bees, land on a white petal below the hood which acts as a “landing pad.” The insect next heads for the tip of the nectar-filled spur located at the back of the flower. In getting there it brushes against, and often picks up, packets of pollen (pollinia) before moving on to the next blossom, where cross-pollination ideally takes place. (Thanks to Ginny Barlow for photo op.)

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