“Almost everyone knows about Luther Burbank (1849–1926) and his russet Burbank potato, especially ardent fans of McDonald’s french fries. Making hand crosses in the manner of traditional plant breeding, Burbank, ‘the wizard of horticulture,’ created dozens of new varieties of fruits and vegetables, along with the much-beloved Shasta daisy and ninety-one other types of ornamental plants….
“Curiously, hybrid plant origins were something horticulturists often tried to conceal in the not-so-good-old days. In parts of Western Europe and America, hybrid plants were often regarded as ungodly, or certainly at least unnatural and to be avoided. Prideful man was not permitted to ape his Creator by producing a new kind of living thing….
“This sounds ridiculous today, but even Luther Burbank told a story about how a minister, posing as Burbank’s friend, denounced him from the pulpit for flouting God’s laws by creating hybrids. It seems that Burbank’s Shasta daisy, proudly grown in American gardens for more than a century, is not so innocent a bloom despite its many, pure-white ‘chaste’ petals.”
From “Adolescent Garden” in Red Clay by Eve Hoffman:
My garden is five years old, orderly and raucous, blurring the line between what we planted and what God planted….
A modest magnolia on the edge of the woods, an elm growing so fast its limbs have been raised twice. Oak leaf and lace cap hydrangeas the deer pruned down to the ground when first planted. White and purple beauty berries, tiny pale blue butterflies. Red rhododendron blossoms the size of white peonies next to them, blue iris….
Echinacea, shasta daisies, bushes with berries that invite birds and tree branches that fork to hold nests….
Summer wasps and weeds, wildness to be tamed, plants surrendering to the Georgia heat. And in the season of no blossoms a hortus botanicus of texture and green.
“Of all the patterns and forms of nature, the spiral has probably held the greatest appeal for mystics and dreamers. It is revered by adherents of ‘sacred geometry,’ who consider the patterns and forms of nature to embody spiritual truths of the cosmos. Spirals are found in ancient and indigenous art ranging from the carvings on the Bronze Age stones of Newgrange in Ireland to the paintings of Australian Aborigines.
“Nothing better exemplifies the apparent mystery and profundity of the logarithmic spiral than its manifestation on the heads of flowers such as sunflowers and daisies. The seeds of a sunflower head are arrayed in rows that trace out not just a single logarithmic spiral but two entire sets of them, rotating in opposite directions. The pattern that results has profound mathematical beauty: crystalline precision combined with organic dynamism, creating shapes that seem almost to shift as you stare at them….
“If you count the numbers of spirals in each set, you find that they only take certain values…. For smaller sunflowers there might be 21 spirals in one direction, 34 in the other. For very large heads, there might be as many as 144 and 233. But only these pairs of numbers — never, say, 22 and 35. Why are some of these numbers favored over others?
“No one is yet sure why the sunflower seeds adopt this arithmetical arrangement. One longstanding idea is that it enables the florets or seeds or leaves to pack most efficiently as they bud from the tip of the growing stem…. This is simply a geometric problem: if you want to arrange objects in an array spiraling out from a central source, what should be the angle between one object and the next? It turns out that the most efficient packing, which gives the double-spiral Fibonacci pattern of phyllotaxis, is one for which this angle is about 137.5 degrees — known as the Golden Angle.”
Hello!
This is the first of two posts with photographs of white asters — most likely, Shasta Daisies (Leucanthemum × superbum) — that I recently took at Oakland Cemetery’s gardens. Many of these Shastas appeared in large clumps — spanning fifteen to twenty feet horizontally — and (as you can see from the first three photos) were quite content to grow in the shade of an old Oak Tree, while edging their way toward sunnier positions on one of the garden’s sidewalks.
As is true for most of the flowers in the Aster family Asteraceae, the central disc of these daisies actually consists of many tiny, individual flowers — which gave rise to “Composite” or “Compositae” as an earlier name for Asters. While working on some of the close-up photos in this series, like this one…
… I became a bit obsessed with how the orange-yellow disc looks, where (below in a zoomier view), you can see how the center of the center is packed with flowers but the outer edges are not.
In my imagination (such as it is!), I thought maybe some little bees had come around, picked the flowers from the outer rings, and gave them happily to their other bee friends. Hey, why not? But then it occurred to me that they probably wouldn’t have managed such nearly perfect circles as they picked the flowers, so that might not be an accurate observation.
I wanted to learn more about why the central discs looked like this, and after a few abortive attempts, hit on a question I could ask one of my AI Assistants:
When I look at photographs of a daisy’s disc florets, it appears that some of them are empty, especially around the outer edge of their circle. Why do they look like that?
The response I got included several possibilities — including “removal” by insects (haha!) and wind or rain damage — but the most plausible explanation was that the disc fills with flowers from the center outward, and those in the outer rings had not yet matured. Armed with this knowledge, I went back a few days later and checked some of the same flowers again to see if the discs had filled in — but it was too late and the white Shastas were already beyond their flowering stage. Perhaps next fall, I’ll try that again.
That the central disc fills with flowers from the center to the outer edge was equally fascinating to me, and digging into that I learned a little more about what happens. The tiny florets actually grow in two concentric spirals — with one spiral running clockwise and the other running counterclockwise. Look again at the zoomed-in photo and you can clearly see the spirals. And once you see them, you’ll see them every time you look closely at a flower like this.
This arrangement is not only not random, it runs in a mathematical sequence among the flowers in the Aster family. Starting from the center outward, the number of individual florets follows the Fibonacci Sequence — where each subsequent number is the sum of the previous two numbers: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233. Most of the smaller Asters — like the Shastas in this post — have 34 or 55 individual florets (yes, I counted them!) in the outer ring. Sunflowers — also members of the Aster family — are often used to explain this mathematical sequence in nature, so if the subject interests you, search for terms like “Fibonacci sequence and sunflowers” or phyllotaxis (which encompasses the study of natural shapes, merging botany and math) on YouTube and you’ll find quite a few fun explanations.
“Behavioural studies in the twenty-first century have sought to provide a better understanding of the mechanisms by which bees forage. We know now that they do not ‘see’ shapes or objects but instead detect parameters and recognise places, and by using their 300-degree vision they are able to triangulate on just a few clues in order to find food. The patterns that we see in the flowers around us have evolved to play to such perception, and as our understanding of both plant and pollinator increases we are able to gradually unfold more details of the complex relationships that have formed between them…. “The yellow and black of the Rudbeckia petals is a useful clue to help us understand how bees respond to the colour signals from plants, as it tells us that the contrast between colours plays a significant role. There appears to be yet more evidence for the importance of this colour contrast, in the way that non-floral parts of the plant are seen, or not seen, by bees. As the green parts of a plant must be able to absorb light from the sun in order to photosynthesise, much of the UV light that falls on the leaves and stem is absorbed by pigments such as flavanoids and chlorophyll. As a result, for an animal who sees predominantly in the UV region of the spectrum, green vegetation appears almost black. The effect of this is that the UV-reflecting parts of flowers are heightened by the black background, making them more obvious to certain pollinators.”
“The name [Rudbeckia] was bestowed by Linnaeus, in honor of his teacher at Uppsala University in Sweden, Olof Rudbeck the Younger, and his father, Olof Rudbeck the Elder. It is the dark centres to these golden-yellow daisies which draw us to them — hence, the common name black-eyed Susans (coneflower is another). There are 23 species, all rapidly growing herbaceous perennials and all native to North America, largely the midwestern and eastern U.S. states….
“Rudbeckias are generalists, growing in a wide range of both open and lightly shaded habitats, from virgin prairie to waste ground, but preferring moister and more fertile soils. Of the species in cultivation, Rudbeckia hirta and R. triloba are short-lived non-clonal perennials, often members of pioneer communities; the remainder are clonal and competitive, often strongly spreading, although not always persistent. Rudbeckias have had a minor role in Native American medicine, sometimes as a substitute for echinacea.”
Hello!
Last week I went hunting at Oakland Cemetery’s gardens for some of the tiny, colorful asters that I’ve previously photographed around this time of year (see, for example Autumn Asters (1 of 3), Autumn Asters (2 of 3), and Autumn Asters (3 of 3)). I was a little too early, as it turns out, finding only tiny buds not yet ready to open — but I did come across some substantial gatherings of the flowers featured in the images below. The first three photos will give you some idea of the flower volume: a bloom-forest teaming with moths, bees, and other wee pollinators bouncing among the “eyes” of these flowers.
Black-eyed Susans (Rudbeckia hirta) and Brown-eyed Susans (Rudbeckia triloba) are members of the Asteraceae family — so I guess I actually did find asters, just not the ones I was looking for. Wikipedia lists other common names for the plants, including Coneflower, Brown Betty, Gloriosa Daisy, Golden Jerusalem, English Bull’s Eye, Poor-Land Daisy, Yellow Daisy, and Yellow Ox-eye Daisy — and many of these names likely have some fun historical roots and local usages. I did asked one of the AI tools if the name “Susan” in “Black-eyed Susan” once referred to any specific person, and here’s what I sort-of learned from ClaudeAI:
There are a few theories about the origin of the “Susan” part of the name Black-eyed Susan, but unfortunately there is no definitive evidence pinpointing exactly who Susan refers to. Here are some of the main theories:
One belief is that it was named after an English woman called Susan who frequently handed out flowers, including rudbeckias. This may explain the flower’s association with cheerfulness and hospitality.
A common legend says it was named by European settlers for a native Algonquin woman who helped them learn wildflower names. This speaks to its native North American origins.
Some think it may be biblical in origin and refer to Susanna from the Book of Daniel in the Old Testament.
There are unverified references to individual women named Susan in colonial America for whom the flower was informally named.
It may simply refer generically to the archetype of a strong, plainspoken woman, as Susan sometimes represented in folk culture.
Unfortunately there is no solid evidence for any of these possibilities over the others. The name was in use by the late 1700s, but the exact inspiration remains mysterious. So while the “Susan” in Black-eyed Susan is vivid, the specific person or meaning behind it has been lost to history.
It was an overcast day when I took these photos, which made the flowers glow against their dark green backgrounds, and the filtered light accentuated a color shift from yellow toward a more saturated orange. The “eyes” actually vary in color and include both black and dark brown, which helped me differentiate Black-eyed from Brown-eyed Susans. The brown eyes reflect more yellow or orange shades from the flower than the black ones, on which you may see bits of blue color along with the black.
From “The Mind of a Shopper in the Flower Supermarket” in The Mind of a Bee by Lars Chittka:
“While foraging, the bee also has to overcome the frustration and the starvation risk of finding dozens of empty flowers in a row that a competitor has recently emptied, and she must decide when to cut her losses and explore for an alternative food source….
“As she keeps visiting several thousands of flowers a day, rules begin to emerge; for example, are bilaterally symmetrical flower species (such as snapdragons) more rewarding than radially symmetrical ones (such as daisies), irrespective of species and color? Learning rules is not typically regarded as within the reach of an insect mind, but… the pressures of operating in the flower supermarket have given rise to such intelligent operations in the bee. What’s more, while figuring out all these contingencies, she also has to dodge attacks from predators, and remember and avoid flower patches where predation risk is especially high. She has to keep track of the location of her home no matter how convoluted her flight path, and in the face of wind gusts that might displace her far from her established route.”
There are notes of joy from the hang-bird and wren, And the gossip of swallows through all the sky; The ground-squirrel gayly chirps by his den, And the wilding bee hums merrily by.
Hello!
The flowers featured in this post are members of the Asteraceae family, often referenced by Aster as a genus — and the family and genus includes asters, coneflower, chrysanthemums, and daisies, among others. I say it like that because I couldn’t quite identify a specific flower name for all of these, though my goto-plant-identifying-source (Pl@ntNet.identify) thought they were each most likely a variety of Persian daisy. This may or may not be true, but you can’t go wrong by calling them asters, and you probably won’t be wrong if you call them daisies.
In late October through mid-November, aster varieties bloom profusely around my neighborhood, wildly flowering streetside and at places like Oakland Cemetery’s gardens or the Atlanta Botanical Garden, showing off some of the last summer color before the leaves turn toward fall. At Oakland, there are large plots with mixed plantings, some in spaces twenty to thirty feet long and a half-dozen feet wide, filled with bees and wasps engaging in late season pollen-gathering. Many buzz off when I stomp up with the camera; but on a recent trip enough of them hung around that I was able to get some decent shots as they went about their business.
I’ll say it’s momentarily intimidating to realize you’re standing at the edge of a flowerbed and nearly surrounded by bees. And I do mean LOTS of bees. But they paid little attention unless I got too close, bopping from petal to petal and all but ignoring me — except for a single little wasp that flew in my left ear and drilled its way out my right one…
… which of course only happened in my imagination. My nervousness gave way pretty quickly, though, and I settled into this ethereal feeling that seems very specific to autumn: the quiet pleasure of cool temperatures, a mix of sunlight and clouds, light breezes, leaves tumbling along the ground, and — on this day — the zippy sounds of bumble- and wasp-wing mixing with it all.
The first gallery below shows a bumblebee on a beautifully colored flower, one that appears nearly brown in full sunlight but reveals these shades of red, orange, and magenta in the shade. This particular bee was hard for the camera to focus on: in addition to the bee’s constant motion, the camera seemed to get confused by its puffy fur coat — but at least I got a few images that were pretty sharp and in the third photo, you can (just barely!) see the bee’s eyes.
The second gallery shows a single wasp coming in for a landing. I have no idea how that worked out so well — I think I focused on the flower and pressed the shutter button as fast as I could. Sometimes you’re just giddy — aren’t you? — about your (photographic) luck!
If you take a close look at some of the subsequent photos — especially the last five — you can see clumps of yellow-orange pollen gathered around the bee’s knees. I guess that’s proof that they weren’t just flying around because they could (though that’s what I would do): they were busy, and hard at work!
