Summary: Does a unique flower like rafflesia how a unique life cycle? Join Kiersten to find out! For my hearing impaired listeners, a complete transcript of this podcast follows the show notes on Podbean Show Notes: “Most of the world’s largest flowers (genus Rafflesia) are now on the brink of extinction,” by Pastor Malabrigo Jr, Adriane B. Tobias, Joko Witono, Sofi Mursidawati, Agus Susatya, Mat Eunuch Siti-Munirah, Adhityo Wicaksono, Reza Raihandhany, Sarah Edwards, and Chris J. Thorogood. https://doi.org/10.1002/ppp3.10431 Start the Week Podcast: Mysterious Plants. 04 March 2024. https://www.bbc.co.uk/sounds “Colossal Blossom: Pursuing the peculiar genetics of a parasitic plant,” by Jonathan Shaw. Harvard Magazine. https://www.harvardmagazine.com Music written and performed by Katherine Camp Transcript (Piano music plays) Kiersten - This is Ten Things I Like About…a ten minute, ten episode podcast about unknown or misunderstood wildlife. (Piano music stops) Welcome to Ten Things I Like About… I’m Kiersten, your host, and this is a podcast about misunderstood or unknown creatures in nature. Some we’ll find right out side our doors and some are continents away but all are fascinating. This podcast will focus ten, ten minute episodes on different animals and their amazing characteristics. Please join me on this extraordinary journey, you won’t regret it. The third thing I like about rafflesia is its life cycle. In the first episode I hinted it at it a bit. Most of its life it is invisible and is a parasitic plant with a specific host plant. Let’s get into the fine details of rafflesia’s life cycle, and strap in listeners because this one is a doozy. When I chose rafflesia as my next unknown creature, I had no idea how how crazy the life cycle was, but my research has blown my mind. Enough anticipation, here we go. Rafflesia have no roots, no shoots, no stems, and no leaves. Off to a good start when talking about a plant, right? The only thing left is petals and reproductive parts. Well, that’s essentially what rafflesia are made up of. They spend most of their life hidden within the vines of their host plant. Vines in the genus Tetrastigma are the current host plants to rafflesia. They may be the chosen host due to the fact that they hold a lot of water, as do many vines. Rafflesia buds pop out of the vines with no warning, or a least with no prior indication that we have seen. The buds pop out from a vine and will grow for months until they are the size of a cabbage, a large cabbage, like a basketball size cabbage. They look like the cabbage, as well. As the bud grows the petals remain wrapped tight like a cabbage. Most of the buds will be an orange color, since a good majority of rafflesia are a brick red color. When the bud is ready to bloom, five petals will unfold. In the middle of the flower is the floral chamber. Quoting from the Harvard Magazine article by Jonathan Shaw, the central floral chamber is (quote) “orb-shaped, with a circular opening at the top, [it} resembles a planetarium or astronomical observatory with a mottled roof partially opened to the sky.” (End quote). In the largest rafflesia flower, Rafflesia arnoldii, the chamber is big enough that an infant could comfortably take a nap inside. This is such a poetic and accurate description of the middle of rafflesia. Inside the opening is a disk covered with spikes. It looks like one of those rubber spiky balls that you can get your for dog. They give the inside of the planetarium structure a bit of a medieval torture chamber feel. Scientists have not determined what these structures do for the flower. The bloom will last about a week. During that week it is trying to attract pollinators to help is reproduce, just like all flowering plants. Those of you that are gardeners about there, you know exactly what I’m talking about. When the plants that you’ve loving planted and taken care of bloom, then you see the real reward. Pollinators such as honeybees, native bees, butterflies, moths, hummingbirds, and bats are attracted to the blooms and help the plant swap pollen which leads to reproduction. That is the same goal for rafflesia, as well. They use scent, jut like other flowers, to attract pollinators, but the scent they produce is a bit different than your typical flower. Rafflesia arnoldii, is also know are the ‘corpse lily’ or the ‘carrion flower’. That probably tells you what you need to now about the scent of this enormous flower. It smells like rotting meat. We are going to delve deeper into the details of this odoriferous scent in a future episode, but rafflesia is targeting a specific pollinator, carrion flies. Carrion flies are attracted to rotting meat where they their eggs so the larvae can consume the decaying flesh and transform into adult flies. Rafflesia employ a trick that many plants use to get what they need from mobile animals, pollen from another flower ...
