Our Window on Nature

Cattails — By Any Other Name

Filed under: Plants — Lowell and Kaye Christie -- May 20, 2007 @ 10:56 am

Cattails Flagtail, marsh beetle, blackcap, water torch. Visit the shoreline of most lakes, rivers, marshes, and ponds, and you’ll see areas of these grasslike plants stretching as much as 10 feet high above the water. In some places they are called rushes, flags, or Cossack asparagus.

Names used by American Indians are just as descriptive: prairie chicken feathers, eye itch, and roof grass. Since the plant grows on nearly every continent and is native throughout the United States, this multiplicity of names is not surprising. Whether you call it candlewick, cat o’nine tails, or the more familiar cattail, the cattail plant is familiar to most people who venture outdoors.

Although we knew cattail marshes were a habitat for certain birds we chased with binoculars and a camera, we actually took a closer look at this familiar sight during our first year of full-timing. Perhaps it would be more appropriate to say, that’s when we had our first taste of this interesting plant.

One of our favorite books of the period was Stalking the Wild Asparagus by Euell Gibbons. It was our personal guide to eating our way across the country while avoiding fast-food restaurants. And it had an entire chapter on the edible cattail. In fact, Gibbons called it the “Supermarket of the Swamps.” (Read the rest …)

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The Oldest Living Tree is a Bush

Filed under: Plants — Lowell and Kaye Christie -- May 6, 2007 @ 1:05 pm

Creasote When we were kids in school, it was common knowledge that California’s redwoods were both the world’s oldest and its tallest trees, and that the earliest of them sprouted at about the time Jesus Christ was born. Then some wise guy discovered bristlecone pines of twice that age growing atop the barren peaks of California’s White Mountains, and we had to revise our thinking about longevity.

Now another researcher from the Golden State has thrown us a curve. Dr. Frank C. Vasek of the University of California at Riverside claims to have found a new “oldest living organism on earth” growing in the Mojave desert — only this time, it’s a bush.

Travel through the Chihuahuan, Sonoran, and Mojave deserts from Big Bend National Park to Joshua Tree National Monument, and the most common form of vegetation that you’ll find outside your window is the creosote. This bush thrives at below sea level in Death Valley. It grows where nothing else will, in the desiccated plains surrounding Yuma, where there is a miserly three inches of rainfall a year. Creosote even tolerates being buried by sand dunes, as long as it can grow fast enough to keep a few branches poking up through the sand. In short, this plant is a survivor.

It was at least 11,700 years ago that the American Southwest turned into a desert as we know it. The last Ice Age ended, the climate warmed and dried, and conditions were ready for new forms of vegetation. Creosote was the first plant to inhabit the desert terrain, and since the oldest creosote is estimated to be 11,700 years of age, we must have had deserts around for at least that long.

(That makes the oldest living creosote twice the age of the oldest bristlecone. Sound familiar?) (Read the rest …)

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Foreign Flora

Filed under: Plants — Lowell and Kaye Christie -- April 13, 2007 @ 9:29 am

Dandelion This country is not only peopled by immigrants, but it’s vegetated by them as well. A high percentage of the plants you see when traveling across the North American continent are actually non-natives.

The seeds of these first exotics, as they’re called, arrived right along with the explorers and colonists. Some were intentional imports; others weren’t. Grasses such as timothy, crabgrass, and ryegrass were used to feed cattle. Wild parsley and chickory were used for food, while foxglove, coltsfoot, and tansy served medicinal purposes. Other plants were brought for their beauty, in an effort to ease the loneliness of life in a new land.

A couple of centuries later, botanist J.M. Fogg found that 14 percent of the plants listed in Gray’s Manual of Botany - more than 1,000 species in all - were introduced.

Not all of these non-native species came as invited guests, of course. Many crossed the ocean attached to the clothes of the colonists or to the fur of their animals. In his book North With The Spring, naturalist Edwin Way Teale points out an example of how it can happen. (Read the rest …)

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A Closer Look

Filed under: Uncategorized — Lowell Christie -- April 3, 2007 @ 3:47 pm

Magnify Last month I lost my keys. That didn’t bother me nearly as much as not having my most-used naturalist’s tool readily available. On my key ring I have a small ten-power magnifying glass.

When I’m outside I usually have my binoculars, I often have a camera, but I always have my keys and a way to examine whatever catches my attention. I think that particular magnifier has probably traveled in my pants pocket for at least 25 years.

What can you do with a magnifying glass? Have you ever seen the delicate hooks that hold a bird’s feather in it’s streamlined shape? Or tried to figure out how a tiny tree frog manages to stick to the outside of a sliding glass door?

From the miniature scales on a butterfly’s wing to the texture of the bark from a trailside tree, the world seen through a magnifying glass will reveal details that most will never see. Try it on your next outing and, like me, you’ll never leave home without one. (My keys were found and returned, magnifier included.)

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Seeing the Wind

Filed under: Weather — Lowell and Kaye Christie -- March 22, 2007 @ 1:55 pm

Dust Devil You can’t actually see the wind. It’s as invisible as sound waves or thermal energy. Yet wind manifests itself in tangible, sometimes startling ways.

The other day as we walked out on the desert we heard the sound of water swirling down a manhole. Well, that’s what it sounded like. We noticed pebbles tumbling almost at our feet, and bushes trembling and grasses bending — and yet we felt no movement. It was a desert whirlwind, acting upon things we could see.

Clouds speeding across the sky give more evidence of wind, and when we see two levels of clouds traveling in opposing directions we realize that winds aloft can blow from different points of the compass. Other times we watch clouds torn into fragments and strewn across the sky, all done by the wind. (Read the rest …)

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Our Window on Nature

Cattails — By Any Other Name

The Oldest Living Tree is a Bush

Foreign Flora

A Closer Look

Seeing the Wind

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