Detailed pollination studies in natural populations of milkweeds
have demonstrated that pollen frequently limits fruit production.
Orange-and-black monarchs dart and waver over North American summer landscapes coast to coast and as far north as Canada, seeking milkweed
plants as sites for laying eggs.
As long as people are putting in rain gardens, they can slip a few milkweeds
is clonal, so I suspect that these plants are albino shoots from the underground stems of the larger plants around them.
in Canada, including the beautiful showy milkweed
, are no longer common.
But the toxicity of an individual monarch depends on the variety of milkweed
it ate as a caterpillar, Brower says.
Thoughts of the beautiful orange-and-black winged beauties, pudgy zebra-striped caterpillars, milkweed
plants, and for the lucky few, perhaps memories of green chrysalises and metamorphosis come to mind.
The nationally certified and registered waystation provides the necessary milkweeds
, nectar sources and shelter to sustain the monarch butterflies as they migrate through North America.
in Mexico, return the following spring to the southern United States, and establish a new generation by laying their eggs on milkweeds
of the genus Asclepias.
According to environmentalists and conservationists, the low numbers of both milkweeds
and monarchs are telltale, not coincidental.
and oaks, plants that caterpillars graze on, collected from alongside a country road carried higher sodium concentrations than the same species growing at least 100 meters from the splash and drift of deicing salt, says Emilie Snell-Rood of the University of Minnesota in St.
How can one not be enthralled by a fluttering flock of monarch butterflies landing in a hedgerow full of flowering milkweeds
nestled on the edge of a farm or garden?
Grasslands that were once home to milkweeds
, along with monarchs, pollinators and other forms of wildlife, have been plowed under to produce more corn and soybeans.
Because no species can do everything, milkweeds
that grow fast necessarily have lower resistance to aphids," said Agrawal.
Both swallow-wort species may be threatening monarch butterflies by displacing the common milkweeds
on which they feed.