Orchids: the success of beautiful cheats

Posted on behalf of Alison Abbott

image001One in seven flowering plants on Earth is an orchid. The Orchidaceae, one of the oldest, as well as the most extensive, families of flowering plants, comprises 749 genera and around 26,000 species. Some have evolved to survive in the most inhospitable of environments, pushing their sweet blooms through the sands of arid deserts or the icy soils of Arctic tundra. All this I learned from The Book of Orchids, a luscious coffee-table tome from Ivy Press (and the University of Chicago Press in the United States), coauthored by Tom Mirenda, Mark Chase and Maarten Christenhusz.

Orchids didn’t achieve their success by being nice guys. They are “Masters of deception and manipulation…famous for lying and cheating,” writes Mirenda, the Smithsonian Institute’s orchid collection specialist, in his introduction.

The book describes 600 representative species, with each photograph reproduced at life size. The selection shows off the aesthetic range of the family, from the startling beauty of Australia’s extravagantly multi-coloured Queen of Sheba (Thelymitra variegata) to the dull arum-leaved spurlip orchid (Pachiplectron arifolium) from New Caledonia, whose puny brown petals make it appear dead.

Introductory essays summarise the unlikely biology of the family and the threats to some of its species.

Queen of Sheba orchid (Thelymitra variegata)

Queen of Sheba orchid (Thelymitra variegata){credit}Maarten Christenhusz{/credit}

All orchids begin as a structure called the protocorn, a small ball of cells without roots, stems or leaves. For the embryo to develop, the protocorn needs to be infected by a fungus which provides it with the necessary sugars and minerals.

Nearly all orchid species share two other physical characteristics. Almost without exception, the male and female structures — the stamen and the stigma — are fused into a single column, which makes for unusually efficient pollination. And most orchids have one very distinctive petal that is modified — thanks to an unusual mechanism of genetic control — into a sort of lip upon which pollinators like bees, wasps or moths may land.

The lip is a main site of the orchid family’s deception. Pollinators land in the belief that its patterns promise something attractive, like nectar or a mate. The repertoire of scams in the orchid family is as broad as its range of beautiful form and colour. And the tricks are mean. Flowering plants generally use traits like colour or scent to attract pollinators, and then reward them with nectar so that they return regularly. Most orchids don’t bother with the reward. The pollinators, unsurprisingly, quickly learn not to be fooled.

Lazy Spider orchid (Caladenia multiclavia){credit}SOF/K. Senghas{/credit}

But that doesn’t bother the orchids. Because of their unusual structure, orchid flowers load vast amounts of pollen onto the back of a naïve insect during its first visit. That load is readily scraped off onto the thousands of ovules in the next flower it visits while it is still working out that it is being cheated. Vast numbers of seeds result from a single encounter.

Orchids can fool by mimicking characteristics of other flowers which do give rewards — some produce look-alike nectar spurs that contain no nectar — or by aping the sexual hormones of insects. Many species have evolved multiple fake lures. The lazy spider orchid (Caladenia multiclavia) from south-western Australia, for example, attracts a local wasp both with sex pheromones and an insect-like silhouette.

Orchids’ sense of entitlement extends to their relationships with fungi, which get nothing in return for their efforts in supplying orchid embryos with vital nutrients. Though some orchids do provide sugars with fungi as they mature, others continue their unrewarding exploitation lifelong.

Lady Ackland's cattleya (Cattleya aclandiae)

Lady Ackland’s cattleya (Cattleya aclandiae){credit}Eric Hunt {/credit}

Meanwhile, humans are doing what they can to challenge orchids’ survival skills. Many species are under threat from collectors supplying them to manufacturers of faddy foods, drinks and therapies. Some of the most beautiful species, like the Queen of Sheba or the Malaysian slipper orchid (Paphiopedilum rothschildianum) are threatened by poachers supplying horticulture.

The Book of Orchids numbers 100,000 cultivars, mostly hybrids, in the horticultural trade. Few reach general retail outlets. For orchid-lovers like myself who select from the offerings of their local garden centre, the book offers (alas) no advice on how best to look after these beauties, but raised my respect for them to a yet higher level.

 

 

Alison Abbott is Nature’s senior European correspondent. She tweets at @alison_c_abbott.

 

For Nature’s full coverage of science in culture, visit www.nature.com/news/booksandarts.

An artist on Mars: Georgia O’Keeffe

From the Faraway, Nearby, 1937 (oil on canvas).

From the Faraway, Nearby, 1937 (oil on canvas). {credit}The Metropolitan Museum of Art, New York. Alfred Stieglitz Collection, 1959 © 2016 Georgia O’Keeffe Museum/ DACS, London. Photo: Malcom Varon ⓒ 2015. Image copyright The Metropolitan Museum of Art/ Art Resource/ Scala, Florence {/credit}

Jimson weed, a cow’s skull, bare mountainsides scored by flash floods: revelations of beauty in badlands mark the work of American artist Georgia O’Keeffe (1887-1986). This is ‘nature’ art from a Modernist sensibility — strong, simplified form shocked into being by a lush palette. O’Keeffe may once have been drawn to the dark hearts of flowers, but she became a desert geek par excellence, in love with geological strata and stripped skeletons in the Martian landscapes of New Mexico. “The bones,” she wrote, “seem to cut sharply to the center of something that is keenly alive on the desert even though it is vast and empty and untouchable”. Much as early nineteenth-century art of the sublime — in tandem with explosive discoveries in geology — shifted Europe’s responses to its own wilderness from repulsion to awe, O’Keeffe taught us to see new worlds in the New World.

Georgia O'Keeffe, 1918 (platinum print).

Georgia O’Keeffe, 1918 (platinum print).
{credit}Alfred Stieglitz {/credit}

As I’m reminded again and again at the eponymous show at London’s Tate Modern, this was an artist formidably focused on subjects not as an element in a composition but as the main event. Many pieces are like tightly cropped photographs. Her marriage to engineer-turned-photographer Alfred Stieglitz and friendships with his peers, such as Paul Strand, steeped her in the technology’s possibilities. Like them, O’Keeffe relished extreme close-ups and ‘long shots’ framed to emphasise form.

Her lifelong immersion in nature began on a Wisconsin dairy farm. The youthful O’Keeffe was encouraged in her bent towards art, studying at Chicago’s prestigious Art Institute School and the Art Students League in New York. In 1912 she ventured to west Texas for two years to teach art. Her aesthetic — severe and sinuous, hovering between abstract and representational — began to emerge as she exulted in the vivid geomorphology of Palo Duro canyon (a “lone place”, she noted approvingly) and experimented with watercolour. Back on the East Coast, she studied under the Japanese-influenced artist Arthur Wesley Dow, who emphasised abstract patterns and using the “facts of nature to express an idea or emotion”. She began to produce radical abstracts in charcoal, which would find their way to Stieglitz’s New York gallery and kickstart her career.

The charcoals on show at Tate Modern are powerful evocations of unrolling fern fronds or the intricate lace of a cloud. But in Red and Orange Streak (1919) O’Keeffe flexes different experimental muscles. The painting’s bold arc is a visual rendering of cattle lowing. O’Keeffe’s fascination with music and synaesthesia (which she shared with Wassily Kandinsky) played out in several works, whose many-layered, biomorphic shapes can be read as sonic motifs. In Blue and Green Music (1919/21), subtly shaded waves, ripples and bars surge like a visual symphony.

Blue and Green Music, 1919-21 (oil on canvas).

Blue and Green Music, 1919-21 (oil on canvas). {credit}The Art Institute of Chicago; Alfred Stieglitz Collection, gift of Georgia O’Keeffe, 1969 © The Art Institute of Chicago.{/credit}

O’Keeffe’s life in 1920s New York with Stieglitz was an exploration of urban canyonlands. She became a portrait painter of iconic skyscrapers, deploying stark chiaroscuro and a burgeoning command of form. But like a weed cracking the concrete jungle, nature breaks in. The lunar ‘eye’ in O’Keeffe’s New York Street with Moon (1925) gazes down through a jagged space between buildings at its brash mimics, a streetlamp and traffic light. There is always, in O’Keeffe, a search for an authentic source. The flower paintings (many executed upstate at idyllic Lake George) dive straight in — Oriental Poppies (1927) is a drenching in scarlet, orange and near-black. By working in extreme close-up in this and other pieces such as Dark Iris No I (1929), O’Keeffe frames floral anatomy as pure form. Few look at flowers, she noted, because “to see takes time”; her aim was to surprise the viewer into taking that time.

New York Street with Moon, 1925 (oil on canvas).

New York Street with Moon, 1925 (oil on canvas).{credit}Carmen Thyssen-Bornemisza Collection on loan at the Museo Thyssen-Bornemisza, Madrid © 2016 Georgia O’Keeffe Museum/ DACS, London.{/credit}

O’Keeffe’s pull towards New Mexico began in 1929 and crystallised some two decades later, when she moved there permanently after Stieglitz’s death. Her house facing the flat-topped peak Pedernal (‘Flint Hill’) and the deserts round it became a crucible for her visionary ideas and creative energies. She immersed in landscape and skyscape, sleeping on the roof nights and walking, camping and working in her mobile studio, an ingeniously repurposed Ford Model A. The Southwest, not least New Mexico, had long been an artistic hotbed. But O’Keeffe held her own among illustrious contemporaries probing its riches, such as the great nature photographer Ansel Adams.

She became a connoisseur of bones, discovering their exquisite formal possibilities. Horse’s Skull on Blue (1931) displays its subject like a jewel on satin. Mule’s Skull with Pink Poinsettia (1936) is a Southwestern memento mori, one of many paintings juxtaposing blooms and animal skulls in a strange dialogue between life and death. Was she edging into Surrealism or commenting on the ecological calamity of the Dust Bowl then raging on America’s southern plains? That art-world debate hardly signifies. Despite their massive overexposure, these anatomic portraits seem perennially fresh. From the Faraway, Nearby (1937) fills the canvas with a complex interlacing of antlers sprouting from a deer’s skull; it rides over rolling hills like a multi-perspective meditation on the power of yearning.

Others in O’Keeffe’s New Mexican works play with echoes in organic and inorganic form. The cascades of wrinkled, torn and folded red sandstone in The Mountain, New Mexico (1931) and Black Mesa Landscape, New Mexico/Out Back of Marie’s II (1930) resemble vast piles of offal. And the avalanche of paintings she produced from 1936 to 1949 in ‘Black Place’ — the Bisti Badlands in Navajo territory — intently probe voids and masses in hills she compared to a “mile of elephants”.

Black Mesa Landscape, New Mexico / Out Back of Marie's II, 1930 (oil on canvas mounted on board).

{credit}Georgia O’Keeffe Museum. Gift of The Burnett Foundation © 2016 Georgia O’Keeffe Museum/ DACS, London.{/credit}

Georgia O’Keeffe is an engrossing encapsulation of this great Modernist’s work on the centenary of her first show. It cannot showcase the vast output of her 70-year career, but it does reveal how far she travelled. In the 1924 Celebration — a response to Equivalents, Stieglitz’s series of abstract cloudscapes  — she painted bulbous clouds in restless confusion, like goldfish in a jar. The show’s last painting, finished nearly four decades later, is Sky Above the Clouds III. Its aerial view of flattened cloudforms streaming out to the horizon is, I feel, O’Keeffe freed into the “faraway” — as she put it, “keeping the unknown always beyond”. After her long grappling with the primal in wild America, she was still out there discovering new worlds.

Georgia O’Keeffe runs at Tate Modern, Bankside, London SE1 9TG until 30 October.

 

For Nature’s full coverage of science in culture, visit www.nature.com/news/booksandarts.

Of rice and men: debut review from Nature Plants

Posted on behalf of Anna Armstrong

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Rice germplasm in the Philippines

Nature Plants has sprouted. This new journal focuses on all aspects of plants, from their evolution, development and metabolism to their societal significance.

In the first book review of the first issue, archaeobotanist Dorian Fuller provides a lively review of Renee Marton’s book Rice: A Global History (Reaktion, 2014).  Marton’s slim volume explores the natural, social and cultural history of this staple, consumed by two-thirds of the world population.

She lucidly introduces readers to the long, cross-cultural history of rice, and illustrates some of the social consequences of its trajectory through the ages. The grain’s arrival in the Americas, for instance, paved the way to the cultivation of cotton and sugar, but also drove up demand for slaves. Fuller feels Rice fails to get to grips with insights gained from genetic research over the past two decades, but finds it an accessible, well-illustrated account of how rice has made it to tabletops the world over. And with 16 historical rice-based recipes, it may well leave you hungry for more.

hlhqtj-c1451ad31cdae6d0cdff4ad97c2ae7efNature Plants, the first new journal in four years from Nature Publishing Group, will publish primary research and reviews, as well as opinion pieces, news, and books and arts reviews like this one. Anna Armstrong is its senior editor.

 

For Nature’s full coverage of science in culture, visit www.nature.com/news/booksandarts.