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Other Plants

Sweet Flag
Karen Yukich

Sweet Flag Acorus americanus

The shoreline of Grenadier Pond has extensive patches of the regionally rare Sweet Flag.

At first glance, Sweet Flag may resemble cattail (Typha spp.) However, its bright green, sword-shaped leaves bearing a greenish-yellow, finger-like structure (the spadix) set it apart. Sweet Flag is easily distinguished by the pleasant fragrance given off when the leaves are broken.

DNA evidence supports Acorus as the oldest surviving line of monocots, perhaps providing paleontologists with a picture of the past.


US Forest Service factsheet

Learn more about Sweetflag and other wetland plants here.


Phragmites Phragmites australis

Karen Yukich

The erect stems of this invasive plant typically grow to 2 to 6 metres (6 ft 7 in–19 ft 8 in) tall, with the tallest plants growing in areas with hot summers and fertile growing conditions. It has a hollow stem, stiff wide leaves and large plumy flowers. It commonly forms extensive stands of tightly-matted plants.

The plant is a highly successful colonizer in that it reproduces by spreading its seeds by and by horizontal runners which put down roots at regular intervals and can grow 3 metres or more per year. It is also versatile, with the ability to grow in damp ground, in standing water (up to a meter or so deep), or even as a floating mat.

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Content last modified on August 28, 2011, at 04:45 PM EST