The Incredible Lightness of Gaura

Lindheimer’s Beeblossom (Gaura lindheimeri) ~ Galveston State Park

One of the prettiest plants still blooming on the late October prairie was the Texas and Louisiana native known as Lindheimer’s Gaura, or Lindheimer’s Beeblossom. Often achieving a height of four or five feet, its loose sprays of flowers give the plant an especially airy appearance; the tendency of the flowers to sway and hover in the breeze have led to yet other names, like butterfly Gaura or whirling butterflies.

Its flowers, which open a few at a time from pinkish buds, are visited by long-tongued bees and bumblebees, as well as by butterflies.The genus name Gaura, derived from the Greek word gauros, or ‘superb,’ refers to the flowers. The specific epithet honors Ferdinand Jacob Lindheimer (1801-1879), an extraordinary early Texan now known as the father of Texas botany.

The plant’s narrow, lance-shaped leaves can be tinged with red throughout the year, but autumn increases their color, making the leaves as appealing as the flowers.

In the early 2000s, taxonomic research led to Lindheimer’s Beeblossom and other Gaura species being moved into the genus Oenothera. Today, the plant is known formally as Oenothera lindheimeri, although that name has not been adopted in the horticultural industry. Both the Royal Botanic Gardens at Kew and the Missouri Botanic Gardens still list Gaura lindheimeri as a valid name. 

Frustrating as such changes can be, one indication that the change was warranted is visible even to those without access to an electron microscope or knowledge of DNA analysis.

When Lindheimer’s Gaura is compared to other Oenothera species such as the Pink Evening Primrose, the Beach Evening Primrose, and Sundrops, one obvious similarity is the flower’s stigma.

Beach evening primrose ~ Oenothera drummondii

Oenothera stigmas are divided into four branches which form the shape of an ‘X’ — easily seen in the shadow on the Beach Evening Primrose above. Whichever scientific name is used for Lindheimer’s Gaura, one thing is certain: ‘X’ marks the genus.

The X-shaped stigma of Lindheimer’s Gaura

 

Comments always are welcome.

 

The Lotus Admirer

American Lotus spread across Elm Lake ~ Brazos Bend State Park

According to Greek mythology, Odysseus encountered the tribe known as the LotusEaters during his return from Troy, when a north wind drove him and his men away from Cape Malea and onto an island. After the local inhabitants invited Odysseus’s crew to join them in eating the mysterious plant — known for its ability to induce a dreamy forgetfulness — those who partook became languorous and bereft of memory. Without being dragged back to the ship and chained to their rowing-benches, they never would have returned to their duties. The incident is included in Book IX of the Odyssey:

The Lotus-eaters did not plan death for my comrades, but gave them of the lotus to taste. And whosoever of them ate of the honey-sweet fruit of the lotus had no longer any wish to bring back word or to return, but there they were fain to abide among the Lotus-eaters, feeding on the lotus, and forgetful of their homeward way.
These men, therefore, I brought back perforce to the ships, weeping, and dragged them beneath the benches and bound them fast in the hollow ships; and I bade the rest of my trusty comrades to embark with speed on the swift ships, lest perchance anyone should eat of the lotus and forget his homeward way.

When I discovered the broad expanse of lotuses filling Elm Lake, I had no desire to eat one, but I was more than willing to admire them. Their color, their form, and their height — as much as three or four feet — made me eager to forget my homeward way and linger in their company.

One of the most striking characteristics of the plant is the central, cone-like receptacle that contains ten to twenty pistils embedded in pits.

 

After the flower’s blooming is complete, the receptacles flatten and turn brown as seeds develop. Eventually the receptacle bends downward, releasing its seeds into the water; mallards, Canadian geese, and northern shovelers feed on them, while humans enjoy the empty pods as delightful accents for flower arrangements.

Unlike the mythical Lotus-Eaters, humans consume the seeds, leaves, and starchy rhizomes of the plant for nutrition rather than forgetfulness. Cooked young leaves taste very much like spinach; older leaves are useful for wrapping food. Immature seeds can be eaten raw, while older seeds can be ground into flour. The roots are stuffed, roasted, or stir-fried, and even the stamens of the flower can be dried and used to make a fragrant tea.

English designer William Morris’s advice to “Have nothing in your house that you do not know to be useful, or believe to be beautiful” could apply doubly well to the lotuses in our lakes and ponds; the plants are both immensely useful and breathtakingly beautiful.

Comments always are welcome.

Stars on the Prairie, Stars in the Hills

It didn’t twinkle, but this delightful blue star caught my eye nonetheless. I’d seen the flower in the past, and recognized it as Amsonia tabernaemontana, a member of the Apocynaceae, or dogbane family.

The plant’s genus name honors 18th century Virginia physician Dr. Charles Amson, while its interesting specific epithet (tabernaemontana) recalls Jakob Theodor von Bergzabern (1525-1590), who Latinized his name as Tabernaemontanus, or ‘mountain tavern.’  Also a physician, botanist, and herbalist, Tabernaemontanus has been considered the father of German botany.

The native range of the blue star which bears his name lies well beyond Texas; it can be found as far north as Illinois, and as far east as North and South Carolina. Looking beyond my single star, I found plants bearing its extraordinary multi-colored buds, as well as a few scattered plants covered in blooms.

As I was admiring the flowers, an older man stopped his truck on the road and called to me. “You think those flowers are pretty? Go on down the road a couple of miles to where they’ve burned the prairie, and you’ll see hundreds of them.”

He wasn’t wrong. In the past, I’d witnessed the emergence of thousands of spider lilies after a prescribed burn, but I wasn’t prepared for acres of blue stars, on both sides of the road.

In places, the contrast between the scorched land and the resurgent flowers was breathtaking.

Blue star nectar attracts ruby-throated hummingbirds, carpenter bees, and hummingbird moths, but on that day it was the least skippers (Ancyloxypha numitor) that fluttered by the dozens through the flowers.

The blue stars I found on the coastal prairie aren’t the only Amsonia species in Texas. Amsonia ciliata, sometimes known as fringed bluestar, thrives in dry, open woods or chalky hills; these were photographed between Medina and Vanderpool along Farm-to-Market road 337. The distinctively narrow leaves, as well as slightly shorter and more rounded petals, make identifying the species relatively easy.

Like Amsonia tabernaemontana, the fringed bluestar seems to draw clouds of butterflies. Here, a Gulf fritillary (Agraulis vanillae) spreads its long, narrow wings over one of our prettiest Texas wildflowers: the perfect way to spend a spring afternoon.

 

Comments always are welcome.

 

A Fuzzy Puzzlement

One curious cattail

I suspect most people are familiar with the broadleaf cattail (Typha latifolia), a common plant of marshes, swamps, wetlands, and ordinary ditches filled with standing water.

Cattail stalks contain two sets of tiny flowers. Male flowers, located at the top, disperse after they bloom, leaving the pollinated female flowers to ripen and turn brown beneath the expanse of empty stalk; as the seeds mature, they become the familiar ‘cattail’ beloved of children, birds, and home decorators.

As winter progresses, the smooth, brown seed head becomes ragged as birds pull at the fluff and weather begins to wear it apart. But on January 5, I noticed some catttails at the Brazoria Wildlife Refuge that were more than a little out of the ordinary.

I counted at least a dozen stalks with the strange protrusions: some of the holes they surrounded were rectangular, some round. They didn’t seem random, and it seemed unlikely that birds had been at work. After some searching, I found that the larvae of the shy cosmet (Limnaecia phragmitella) will feed on flowers and developing seeds of Typha spp. The BugGuide page said: “Larval presence can often be detected by quantities of down protruding from the seedheads of cattails.”

Of course, “down protruding from seedheads” could mean any number of things, and the fact that these cattails were growing both some distance off the road and in water deeper than my boots kept me from examining them more closely.

When I sent photos to Thomas Adams, botanist for the Brazoria Refuge complex, he suggested they might be similar to galls that appear after a wasp lays its eggs in the cambium of an oak tree, but he’d never seen anything like them. Neither had a half-dozen other insect or wetland plant enthusiasts I contacted.

Today, I’m no closer to knowing what was going on in that marsh than I was on January 5. One of you may take a look and say, “Well, of course. They’re an example of (insert answer here), and they’re all over the place.”  If not? They’re still intriguing, and a reminder of the mysteries that fill the natural world.

 

Comments always are welcome.

 

Just As Pretty In Pink

 

The flower commonly known to Texans as Indian blanket or firewheel (Gaillardia pulchella) generally blooms in combinations of red, yellow, and orange. A close relative, the maroon blanket flower, or maroon firewheel (Gaillardia amblyodon), can cover a hillside with — what else? — lovely sweeps of purplish-red flowers. In some parts of Texas, there are yellow gaillardia, and a little beauty called sweet gaillardia, or perfume balls, often arrives with only tiny ray flowers, or none at all.

When I stopped for a better look at a patch of unfamiliar pink among the traditionally yellow and red gaillardia lining the roadside near the Brazoria Wildlife Refuge, there was no denying it; nature had provided yet one more in an apparently inexhaustible supply of surprises. The little pink patch was gaillardia.

While seeds for a pinkish gaillardia cultivar now can be obtained through catalogs, none seems as attractive as these unusual flowers, provided by nature herself. Their clear, pure pink was delightful, and if I’m lucky, they’ll reappear next year. I have the spot marked.

 

Comments always are welcome.