Photos / Sounds
What
Soft Rush (Juncus effusus)Observer
nnsmithDescription
Clumped stems >1m tall, not branching, round in cross section. Inflorescence appearing lateral, with many stalked flowers. Leaf sheaths bladeless.
Photos / Sounds
What
Sweet Bugleweed (Lycopus virginicus)Observer
nnsmithDescription
Single stem, rooting from lower nodes. Square stem and opposite leaves, nutlets sessile and clustered in leaf axils.
Photos / Sounds
What
Canada Clearweed (Pilea pumila)Observer
nnsmithDescription
Herb around 0.5m tall. Translucent stem, square, glabrous. Ovate leaves, hairless. Green flowers in axillary panicles.
Photos / Sounds
What
Great Blue Lobelia (Lobelia siphilitica)Observer
nnsmithDescription
Erect herb, around 0.5-1m tall. Alternate leaves. Flowers in terminal raceme with conspicuous leafy bracts. Flowers blue, calyx with auricles between lobes.
Photos / Sounds
What
White Grass (Leersia virginica)Observer
nnsmithDescription
Spreading, delicate grass. Hairy nodes. Glabrous stems and leaves, with bristles along leaf margins. Apressed spikelets in panicle, one branch at lowest node.
Photos / Sounds
What
Giant Ragweed (Ambrosia trifida)Observer
nnsmithDescription
Tall herb, up to 2m. Leaves ovate or 3-lobed in trident shape. Inflorescence of terminal and axillary racemes. Male flowers in nodding heads.
Photos / Sounds
What
Squarestem Spikerush (Eleocharis quadrangulata)Observer
nnsmithDescription
Single stems 0.5- 1m tall, square in cross section. Terminal inflorescence a spike of appressed scales.
Photos / Sounds
What
Seedbox (Ludwigia alternifolia)Observer
nnsmithDescription
~1m tall branching herb with leaves and stem turning reddish. Seed capsules are box shaped.
Photos / Sounds
What
False Nettle (Boehmeria cylindrica)Observer
nnsmithDescription
Erect herb, around 1.5 tall. Opposite leaves with hairs. No stinging trichomes on stem. Inflorescence of green spikes in leaf axils.
Photos / Sounds
What
Blue Mistflower (Conoclinium coelestinum)Observer
nnsmithDescription
Perennial herb with deltoid leaves growing in a clump. Blue crowded inflorescence. Plant ~1ft tall.
Photos / Sounds
What
Straw-colored Flatsedge (Cyperus strigosus)Observer
nnsmithDescription
Triangular stem with large terminal inflorescence. Spikelets linear and crowded on rachis.
Photos / Sounds
What
Marsh Flatsedge (Cyperus pseudovegetus)Observer
nnsmithDescription
Triangular stem with a crowded, terminal inflorescence. Brown and green spikelets radiating in many directions. ~1ft tall.
Photos / Sounds
What
Diverse-leaved Pondweed (Potamogeton diversifolius)Observer
nnsmithDescription
Linear/filiform submerged leaves and floating elliptic leaves, 2-4cm. Achenes clustered on short pedicels in leaf axils.
Photos / Sounds
What
Ovate Spikerush (Eleocharis ovata)Observer
nnsmithDescription
Single stems with terminal inflorescence. Up to ~0.5m tall. Growing in a mat of dense clumps.
Photos / Sounds
What
Arrowheads (Genus Sagittaria)Observer
nnsmithDescription
Emergent herb around 1 foot tall. All leaves basal. Spongy stems, pedicels, and peduncle.
Photos / Sounds
What
Buttonweed (Diodia virginiana)Observer
nnsmithDescription
This plant is a creeping herb, covering the pond bank. Flowers are white to pale lavender and salverform, with 4 petals, 4 stamens, and 2 sepals. Leaves are opposite, simple, and entire, ~5-10 mm wide.
