Swamp Stomp

Volume 18 Issue 30

If you’ve ever driven our country’s major highways, you have most likely come across a few of the world’s more interesting phenomena. Billboards the size of an Imax screen exclaim, “Come and see the world’s largest ball of yarn, the world’s tallest Tepee, (or one of my favorites), world’s largest cherry pie!” Well, not to be outdone, Mother Nature has put in a bid for a “worlds largest” recognition but you won’t see it on any billboard because it only occurs every 3-10 years on average, and even then, it’s only visible for about 24-48 hours. It’s hard to plan to advertise when you don’t know the exact arrival date, about as hard as predicting the birth of a baby.

So without further ado, Mother Nature proudly presents, “The World’s Largest Flowering Structure (inflorescence) on Earth, the Amorphophallus titanum!” AKA “The Corpse Flower” because of the smell it produces, and the less descriptive name, Titan arum. This unique plant is native to the rainforests of western Sumatra, Indonesia, on steep hillsides that are 120–365m above sea level, but it has also been successfully propagated over 570 times around the world since 1889.

The Titan Arum grows from the world’s largest known corm, sometimes weighing up to 220 lbs. (100kg). During the non-flowering years, a single leaf, the size of a small tree, shoots up from the corm. This leaf branches out into three sections with each of these sprouting more leaflets. Each year, this shooting leaf dies and a new one grows in its place. After many years, the plant finally gathers enough energy to bloom. But when it does, it goes all out, producing the largest unbranched inflorescence in the plant kingdom, ranging from 1-4m tall.

This past July the author was part of a large crowd of onlookers who were able to witness the rare bloom of “Peter Grande” at the Plant Delights Nursery, Raleigh, NC. One way of keeping track of Amorphophallus clones is to name them, hence, “Peter Grande”. Other names of specific plants include The Amazing Stinko, Carrion my Wayward Son, and Pewtunia! Who knew Botanists had such imagination?

Once the “flower” appears, a not completely understood process that includes powerful waves of olfactory-battering scents reminiscent of decaying flesh begins the process of pollination. According to the Chicago Botanic Garden’s blog, an analysis of the stench found that it consists of dimethyl trisulfide (also emitted by cooked onions and Limburger cheese), dimethyl disulfide (which has an odor like garlic), trimethylamine (found in rotting fish or ammonia), isovaleric acid (which also causes sweaty socks to stink), benzyl alcohol (a sweet floral scent found in jasmine and hyacinth), phenol (sweet and medicinal, as in Chloraseptic throat spray), and indole (like mothballs). This potpourri of chemicals is assumed to attract pollinators to the plant that they make their way down to the bottom of the inflorescence, deposit pollen on the stigmas, and then remain with the plant for about 24 hours before departing. If successfully pollinated, numerous red fruit, often called berries, are produced. Since the plant draws large amounts of energy from its corm as the seeds develop, eventually the plant dies. Should pollination not occur, the plant survives and begins the process all over again.

Mother Nature has produced a truly amazing plant, but one that is known to be vulnerable to extinction. The rainforests of Sumatra are under massive threat of deforestation, as vast areas are logged for timber and to make way for oil palm plantations. It is estimated that Indonesia has now lost around 72% of its original rainforest cover, and the scale of deforestation is continuing at an alarming rate.

We are fortunate botanists have been able to cultivate this rare species in greenhouses around the world and we owe our thanks to nurseries like Plant Delights, for helping assure that people in future generations are able to witness this wonder of nature.

Sources:

https://www.livescience.com/51947-corpse-flower-facts-about-the-smelly-plant.html Corpse Flower: Facts About the Smelly Plant, By Alina Bradford, Live Science Contributor | May 30, 2017

https://www.plantdelights.com/pages/amorphophallus-titanum-flowering July 2018

http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:84456-1