Sunday, September 20, 2009

Heath Aster

What’s blooming in the area: Tamarix, tea roses, Apache plume, butterfly bush, trumpet creeper, Japanese honeysuckle, silver lace vine, leather leaved globemallow, alfalfa, white sweet clovers, white and yellow evening primroses, datura, Heavenly Blue and ivy-leaf morning glory, scarlet creeper, bindweed, goats’ head, bouncing Bess, pale trumpet, stickleaf, clammy weed, spurge, pigweed, Russian thistle, winterfat, ragweed, snakeweed, native and farmer’s sunflowers, áñil del muerto, Hopi tea, horseweed, wild lettuce, purple, heath, strap-leaf and hairy golden asters, goldenrod, tahokia daisy; bittersweet berries, apples falling.

What’s blooming in my yard, looking north: Zucchini, nasturtium, Mexican hat almost gone, chocolate flower, blanket flower, black-eyed Susan almost gone, chrysanthemum.

Looking east: California poppy, hollyhock almost gone, winecup, snapdragons, Jupiter’s beard, large-leaved soapwort, Autumn Joy sedum darkening, garlic chive, Maximilian sunflower.

Looking south: Blaze roses, rose of Sharon, sweet pea, Crimson Rambler and reseeded morning glories, zinnia, cosmos.

Looking west: Caryopteris, Russian sage, catmint, calamintha, flax, sea lavender, David phlox, leadwort, perennial four o’clock, purple ice plant, Silver King artemisia, purple coneflower, Mönch aster.

Bedding plants: Moss rose, sweet alyssum.

Inside: South African aptenia.

Animal sightings: Rabbit, hummingbird, geckos, bees, wasps, grasshoppers, large black harvester ants, explosion of small dark ants

Weather: Rain Wednesday and Thursday; mornings were cold enough for the furnace to come on and my neighbor to fire up his chain saw to cut fire wood; 12:15 hours of daylight today.

Weekly update: Mornings turn cold, heath asters open, and my thoughts turn to Billy Grammer. In 1959 he sang "summer’s almost gone, winter’s coming on."

Grammer’s answer was it’s time to travel on. That’s good advice for hummingbirds raiding the last hollyhocks, but what about the bees and wasps and other insects still flitting about?

My bees probably come from some hive maintained down by the orchards, and will survive the winter by clustering together and beating their wings to produce enough heat to keep themselves warm. The six-legged creatures only venture out when temperatures rise above 50, so will subsist on stored honey.

Other bee species and wasps have no such surplus. The social wasps, and hornets that are part of that insect group, spent the summer feeding larvae with animal proteins from insects they had killed, including ones that would have eaten the leaves or sucked the juices from my wild asters. The adults themselves lived on sugars and got some nutrients from the process of feeding the grubs, some from flowers, and some from foraging in garbage.

Now the larvae are grown and everyone needs to eat. In some species, the young females will impregnate themselves and burrow under leaves or find an attic to hibernate for the winter. Others will simply lay eggs which remain dormant until spring. The rest, the workers, will die.

Unfortunately, they all need food just when most flowering plants are responding to nature’s signals that winter’s coming on by moving to seed production. Wasps don’t have the specialized tongues of bees and need open, shallow autumn flowers where nectar is easily available. They must have had a tough time this past week when the white asters pulled up their twelve ray flowers to shed the rain.

The small, white composites, like many related asters, seem to have two growth cycles related to changes in light. The basal rosettes emerged this year in late April, but the tall plumes of narrow green leaves didn’t appear until late July, nearly six weeks after the long days of mid-summer stimulated their production. It wasn’t until the shorter days of fall that the flower clusters were ready to open.

With so little time to produce seed and visitations by smooth wasps, who aren’t as efficient at pollinating as hairy bees, heath asters have found others way to perpetuate themselves. Every spring I remember how the skinny stalks turn into a hedge that overshadows everything before smothering the lower plants when they collapse. I pull out most of the plants, but strands of their stolonous roots break off.

After the heat of summer drives me inside, the perennials spread underground and push up new shoots back near the water and paths. By then, it’s too late to do anything except plan how to control them the next year.

Man has found little use for Aster ericoides. Some call it steel weed because the woody brown stems dull their tools; others call it good-bye meadow because it’s poor forage. Only the Meskwaki used it to their lash together their sweat lodges and tested its herbal uses.

The seeds, if they get produced, can last several years. Heath asters are one of the first things to return in tall grass prairies when fields are abandoned. They dominate the land for a few years, then succumb to competition from other plants, including the grasses. When they bloom, they stretch from Manitoba to northern Mexico and provide a nectar path for migrating monarch butterflies, as well as a steady diet for the more sedentary silvery checkerspots.

These are precious weeks when life is suspended between summer and winter. Heath asters may attract stinging insects, but they have no inhibitions about blooming until frost. We can’t all travel on. Those of us who stay around, deserve our pleasures too.

Notes:Clayton, Paul. "Gotta Travel On;" Bob Colton discusses the origins of the song in Paul Clayton and the Folksong Revival, 2008.

Hilty, John. "Heath Aster," Illinois Wildflowers website has more details on insects.

Smith, Huron H. "Ethnobotany of the Meskwaki Indians," Public Museum of the City of Milwaukee Bulletin 4:175-326:1928, cited by Dan Moerman, Native American Ethnobotany, 1998.

Photograph: Heath aster with wasp on cloudy day, 16 September 2009; brown sweet pea pods in back.

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