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Bogs

Rose Pogonia Flowering

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We are at the tail end of the flowering season for Rose Pogonia, (Pogonia ophioglossoides). Although it also has the common name Snakemouth Orchid, the species’ name, ophioglossoides, comes from the Greek word for snake (ophis) and tongue (glossa), referring to a perceived similarity to Adder’s Tongue Fern (Ophioglossum pusillum), rather than a snake’s mouth.

The petals of this exquisite orchid have a delicate fragrance when fresh, reminiscent of red raspberries. The lower petal, or labellum, is deeply fringed and bearded in the center with yellow bristles. Rose Pogonia grows to a height of about two feet, and there is a single narrow leaf near the middle of its stem. Look for it in sphagnum bogs, fens, wet meadows, and acidic swamps. Although Rose Pogonia is pollinated by a number of different species of bumble bees, a white crab spider on the labellum looks like it has captured a much smaller insect that was visiting this particular flower.

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Tamarack Cones Maturing

6-9-17 larch cones 211Tamarack (Larix laricina), also commonly called Eastern or American Larch, grows and drops a new set of leaves every year, just like maples, birches, or other deciduous trees. Found in many bogs, it  is the only native deciduous conifer in the Northeast and is known for its green needles which turn a showy yellow in the fall before falling to the ground as winter approaches. Equally dramatic, however, are its seed cones. They are the smallest of any larch (1/2” to 1” long) and have only 12 to 25 scales. At a certain point (right now) in their spring growth they are bright maroon and resemble tiny roses. They eventually turn brown and open to release the seeds, four to six months after pollination.

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Lesser Purple Fringed Orchis Flowering

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Approximately sixty orchids can be found in the Northeast, more than half of which are found growing in bogs and fens.  (Bogs are filled with atmospheric moisture and have very low levels of nutrients; fens receive their water from streams or springs, and have slightly more nutrients than bogs.)  In July and August in the Northeast,  the Lesser Purple Fringed Orchis (Platanthera psycodes) sends up a  1 – 3’ spike filled with fragrant, tiny (3/4” long) flowers, each of which possesses a three-lobed, fringed lower lip and a long nectar spur .  Found in cooler habitats, its range is being pushed northwards as global temperatures warm — a  specimen was found at an altitude of 1,500 feet in Vermont.   This orchid is on several states’ endangered or threatened lists outside of New England, and a species of special concern in Rhode Island. (Thanks to Shiela and Steven Swett for photo op.)

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Calopogon Flowering

6-26-15  calopogon 113A visit to a bog or marshy area at this time of year may well reward you with the sight of a striking orchid known as Calopogon or Grass-Pink (Calopogon tuberosus). Immediately noticeable are the fine, white “hairs” on the upper lip of the flower, which are thought to act as a “pseudopollen” lure, attracting native, recently-emerged bumblebees. The bees, expecting a reward of nectar and/or pollen, land on the hairs. At this point, the hinged labellum (part of flower that attracts insects and acts as a landing platform) swings down under the weight of the bee and positions the bee on the column (fused male and female structures located directly beneath the labellum), where pollen can be placed on its back. If the bee already carries a load of pollen, it will contact the stigma and thus pollinate the plant.

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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.

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Sundews Capture Their Meals

8-12-13 sundew & damselfly 060Sundews (Drosera spp.) are carnivorous plants often found in acidic bogs, fens and cedar swamps. They have numerous small leaves arranged in a circular, or rosette, pattern and they are covered with reddish, glandular hairs, or tentacles, that exude a sticky secretion at their tips. Insects, attracted to the glistening sticky droplets which resemble dew, land on a leaf and become stuck. The movement of the struggling insect triggers cell growth in the glandular hairs and they begin folding over the insect within 60 seconds. An anesthetic is released by the plant’s hairs, causing the insect to become motionless. Digestive enzymes are then secreted which liquefy the insect’s internal organs so that they can then be absorbed by the plant’s hairs. Although insect prey is not vital to sundews, the nitrogen the plants receive from the insects enables them to thrive in environments where nitrogen is in short supply. The damselfly pictured has been captured by a Round-leaved Sundew’s glandular hairs which have rendered it motionless and have started to grow and fold over the tip of the damselfly’s abdomen and its wings.

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Round-leaved Sundew Flowering

7-25-13 round-leaved sundew flower IMG_0341Sundews are familiar to most people because of their carnivorous life style, trapping and dissolving insects with the glandular hairs that cover their leaves. As amazing as this ability to supplement their diet is, there is even more to admire about them. At this time of year, Round-leaved Sundew (Drosera rotundifolia) unfurls a single curled-up stalk with flower buds running up one side of it. The buds open in succession, one at a time, when they reach the apex of the bending flower stalk, revealing tiny white or pink flowers.