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These are common milkweed plants (Asclepias syriaca).  They have a compound flower known as an umbel.  Milkweed is also known as; butterfly flower, silkweed, silky swallow-wort, and Virginia silkweed.  Milkweeds contain cardiac toxins that make the plants toxic to most insects and animals. Some insects, such as Monarch butterflies and their caterpillars have the ability to store the toxins as a defense.
Wildflowers on bank of lake at sunset
Asclepias syriaca (Common Milkweed) Native North American Prairie Plant
Pollinator meadow at Hidden Valley Preserve in Washington, Connecticut. Second of two.
A large colorful meadow of common milkweed, Asclepias syriaca, bordered by a woodland. Surrounded by white fleabane and grasses.
Brown Moss nature reserve in Shropshire, UK
Pink meadow flowers dominating a water-meadow on Lake Zürich
A view of the forest and fields during the fall season colors.
Enchanting Beauty of the Autumn Forest.
A beautiful field of Joe-Pye Weeds in Connecticut.
Milkweed plants beside a rural fence
Scenery of Karner Barrens Trail in Summer, Albany Pine Bush, Albany, New York, USA
Marsh Land In The Forest Washington State, USA
Wildflowers
Silphium laciniatum (Compass Plant) Native North American Prairie Wildflower
Autumn grass and herbs in the afternoon light in autumn.
This is a photograph of some wildflowers called Rattlesnake Master. They are in the Flanagan Prairie of Arkansas.
Flowering thistle amongst meadow grasses.
Natural field of wildflower meadows in Minnesota in the summer.
Scenery at Valley Forge National Historic Park, Pennsylvania, USA
Himalayan balsam Impatiens glandulifera bloom flower pink blossom, Ornamental touching jewelweed western honey insects collect saw achenes, invasive and expansive species of dangerous plants leaf, leaves and fruits, comes from Asia intruder neophyte Himalayas, reduces the biodiversity of other plants botany and animals, kiss me on the mountain eliminates herbicides and mechanically, shadow soil contamination disaster calamity flowers gatecrasher biomass Europe European
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Filipendula rubra - Queen of the Prairie Pink Blooming Flower
A beautiful field of Joe-Pye Weeds in Connecticut.
Meadow with flowers and forest in the background
Meadow with spider threads
Asclepias syriaca known as common milkweed or butterfly flower in mature stage in field
Beautiful wildflowers blooming in clusters swaying in the wind.
An area of marshes beneath Brown Willy on Bodmin Moor
Dry grass
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