An online resource based on the award-winning nature guide

Posts tagged “Sarracenia purpurea

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.)

Naturally Curious is supported by donations. If you choose to contribute, you may go to http://www.naturallycuriouswithmaryholland.wordpress.com  and click on the yellow “donate” button.


Pitcher Plants Flowering

6-5-15  pitcher plant 007The flowers of Pitcher Plants are just as unusual and fascinating as their insect-luring leaves. These plants can be found blossoming during a two to three week period in the spring (late May-June). Although the maroon petals hanging down typically prevent you from seeing the structure of the flower, it more or less resembles an upside-down umbrella. Within one to two days of the flower opening, the stigmas become receptive and the anthers shed their pollen, which falls into the umbrella-like tray where insects travel on their way to the stigmas. Ants are almost invariably present in the flowers, attracted by the abundant nectar, but they are probably of little importance as pollinators. Bees and flies appear to be the primary pollinators of Pitcher Plants.

Naturally Curious is supported by donations. If you choose to contribute, you may go to http://www.naturallycuriouswithmaryholland.wordpress.com and click on the yellow “donate” button.


Pitcher Plants Turning Red

10-29-13 pitcher plant2 158 Pitcher plant leaves are primarily green in the summer, tinged with red, but as summer turns into fall, many become deep red. Although this red color was thought to attract insects, it appears that this is not the case. The color change, according to research cited in the Journal of Ecology, is due to the level of phosphorus this carnivorous plant has received from its insect meals. There is a limited amount of phosphorus in a bog and plants living there acquire it in different ways. The pitcher plant acquires phosphorus from insects that it traps. It then utilizes the phosphorus to revitalize the (green) chlorophyll in its leaves for photosynthesis. The deep red color that the leaves turn in the fall indicates that the plant has not had a good meal in quite some time.

Naturally Curious is supported by donations. If you choose to contribute, you may go to http://www.naturallycuriouswithmaryholland.wordpress.com and click on the yellow “donate” button.


Pitcher Plants in Winter

3-19-13 pitcher plant in winter2 IMG_6845The pitcher plant flowers that bloomed in bogs last June persist through the winter. Their maroon petals are gone, as is their scent, and they are withered and somewhat drab-colored, but the upside down flowers are still on display, supported by long, graceful stems protruding above the surface of the snow. Pitcher plants flower for about two weeks at the beginning of summer, during which time their pollen is distributed (primarily by bees). After fertilization, 300 – 600 seeds form within each ovary. This is when the carnivorous pitcher leaves develop. In late fall, the “pitchers” begin to wither and the seed pods turn brown and split open, scattering seeds. In three to five years, the plants which these seeds grew into will begin flowering.


Pitcher Plant Flowers

This slideshow requires JavaScript.

The Pitcher Plant (Sarracenia purpurea) is a well-known carnivorous plant of bogs. It gets some of its nutrients by trapping and drowning prey in rain water that is caught inside a modified leaf that forms a cup. While most people are familiar with the leaves of Pitcher Plants, unless you visit a bog in June, you’re not likely to see their unique flower. It is curved over when it’s mature and its sepals (modified leaves that protect the bud and are located above the petals in these photographs) are red-purple and pointed; the petals are red and rounded. An approaching insect would be guided into the flower between two of the sepals–it would land on a petal and climb into the flower onto the umbrella-shaped stigma (the sticky top of the female pistil) which I inverted in one photograph in order to show the male pollen-producing stamens. An insect entering the flower would brush against the stamens, collecting pollen on its back while pollen from a previously-visited Pitcher Plant would fall off the insect onto the sticky stigma on which it was standing, pollinating the flower.