By the Roadside 31: Common Milkweed (Asclepias syriaca L.)

This little project (i.e. to document the variety of flowers growing along the side of the main road through our community) is starting to get a little difficult. I suppose there are only a limited number of such flowers and eventually I’ll run out of new ones (i.e. those I haven’t seen before). But not today. I’ve never come across this rather spectacular flower before. Apparently it’s a Common Milkweed.

According to the US Dept. of Agriculture Forestry Service:

Common milkweed is a member of the Asclepiadaceae (milkweed) family. It is one of about 115 species that occur in the Americas. Most species are tropical or arid land species. The genus name, Asclepias, commemorates Asklepios, the Greek god of medicine. Some of the milkweed species have a history of medicinal use including common milkweed (wart removal and lung diseases), and butterfly weed, A. tuberosa (also known as pleurisy root, used for pleurisy and other lung disease). The specific epithet, syriaca, means ‘of Syria’ in reference to Linnaeus’s mistaken belief it was from Syria. It is a widespread and somewhat weedy species known from most of the eastern United States and the eastern most prairie states as well as southern Canada from New Brunswick to Saskatchewan. It is frequently found in fence rows, on roadsides, in fields, and in prairies and pastures. Given the opportunity, it will establish in gardens and even thin lawns. It is tolerant of light shade, but generally is a full sun species.

This milkweed grows to about 1.5 meters(5 feet) tall, usually occurring in clusters of stout stems. It has rhizomes and quickly forms colonies. Leaves are 15-20 centimeters (6-8 inches) long and 5-9 centimeters (2-3.6 inches) wide. They are somewhat thick with a prominent midrib beneath. The upper surface is light to dark green while the lower surface is lighter, almost white at times. Broken leaves and stems exude a milky latex. Flowers are borne in nearly spherical clusters (umbels) at the top of the plant, usually with 2-5 clusters per plant. Each flower is about 2 centimeters (0.75 inches) long and 1 centimeters (0.4 inches) wide. Flowers are greenish-pink to rosy pink to purplish-pink and very strongly and sweetly scented. Fruits (pods) are about 10 centimeters (4 inches) long, inflated and covered in little finger-like projections. They are green initially, turning brown as they mature. They split open revealing 50-100 seeds each with a white, fluffy coma (“parachute”) that allows wind dispersal.

Common milkweed is Nature’s mega food market for insects. Over 450 insects are known to feed on some portion of the plant. Numerous insects are attracted to the nectar-laden flowers and it is not at all uncommon to see flies, beetles, ants, bees, wasps, and butterflies on the flowers at the same time. Occasionally hummingbirds will try, unsuccessfully, to extract nectar. Its sap, leaves and flowers also provide food. In the northeast and midwest, it is among the most important food plants for monarch caterpillars (Danaus plexippus). Other common feeders are the colorful (red with black dots) red milkweed beetle (Tetraopes tetraophthalmus), the milkweed tussock caterpillar (Euchaetes egle) and the large (Oncopeltus fasciatus) and the small (Lygaeus kalmia) red and black milkweed bugs. The latter two are particularly destructive as both the adults and nymphs are seed predators. They can destroy 80 to 90 percent of a colony’s seed crop. The red (or orange-red) and black coloration of most of these insects is known as aposematic coloration; that is, the colors advertise the fact that the organism is not good to eat.

Milkweeds contain various levels of cardiac glycoside compounds which render the plants toxic to most insects and animals. For some insects, the cardiac glycosides become a defense. They can store them in their tissue which renders them inedible or toxic to other animals. Monarch butterflies use this defense and birds leave them and the caterpillars alone. What the birds do not know is that northern monarchs feeding on common milkweed accumulate relatively little of the toxic compounds and probably would be edible. The more southern butterflies accumulate large amounts of the compounds from other milkweed species and are in fact toxic. Monarchs can be helped by encouraging existing patches and planting new ones. The plant grows readily from seed and spreads quickly by deep rhizomes. Because common milkweed can be weedy and difficult to remove, care should be used to establish the plant only in places where spread can be tolerated.

Taken with a Sony RX-100 M3.

Still Life – Peony

In an earlier post (See: Croton Landing – Killdeer). I mentioned that I might “have a go” a wildlife photography as a challenge.

I recently acquired a copy of Joel Meyerowitz: Where I Find Myself: A Lifetime Retrospective and in it there are a number of beautiful still life photographs.

Since I’ve always found still life’s appealing it occurred to me that this could be another challenge. While I’ve taken still life’s before, this is one of the first I’ve taken since reading the book.

It’s taken in a corner of our house in Briarcliff Manor, which has particularly good light at certain times of day and shows a peony from our garden in one of my wife’s numerous pieces of blue and white china.

Taken with a Sony RX-100 M3.

Croton Landing – Yellow Flag Iris

According to Wildflowers of the United States:

Iris pseudacorus – Yellow Flag Iris, Paleyellow Iris, Yellow Iris, Water Flag. Iris pseudacorus is a species brought in from Europe as a decorative plant for its attractive yellow flowers, escaped, and has established itself well in wet areas throughout much of North America. Think cattails for the habitat in which it grows. It has been used as a plant in natural sewage treatment since it can remove metals from waste water. Its propagation is restricted as an invasive weed in a number of states ranging from Massachusetts to Washington and California.

The lovely flowers of Yellow Iris are large and showy. This is the only yellow Iris in the United States.

…typical Iris pseudacorus habitat – the edge of ponds, marshes, and other waterways. Although it prefers wet habitat, it is drought tolerant and the roots can survive for months without water. Yellow Flag will grow in dense clumps, spreading vegetatively by rhizomes and sexually via seeds. Both the leaves and the flowering stalk can be up to 4 feet tall.

Taken with a Sony RX-100 M3.