Titan VanCoug bloomed on July 27. After a first bloom, titan arum will typically bloom every four to six years throughout a 40-year expected life span. This appears to be the second bloom of the 2019 plant鈥攔ight on time! What makes 麻豆传媒鈥檚 corpse flower unique is that there are four corms (tubers) in one pot. This is why Titan VanCoug has bloomed four times in six years.
Titan VanCoug bloomed June 29 鈥 30, 2023.
It鈥檚 corm cloned years ago, and today four plants reside in one pot. At the time of this bloom, you could see a leaf, fruit from the 2022 bloom and the 2023 bloom, which is quite unusual. A second leaf sprouted just about the time of the bloom.
Titan VanCoug bloomed for a second time Aug. 16, 2022.
Titan VanCoug was successfully pollinated during its second bloom. To help fruit grow, remnants of the bloom were trimmed away to expose the plant鈥檚 fruit-producing spadix. Caretakers prevented mold growth on the spadix by treating it with a vinegar mixture. Each 鈥渂erry鈥 produces two seeds. Seeds have been harvested and will be shared with other universities and conservatories.
The event brought about 20,000 visitors to campus for a look and a sniff. Although the flower was successfully pollinated, the fruit molded and no seeds were harvested.
About Titan VanCoug
Titan VanCoug was planted by Professor Emeritus Steve Sylvester. He planted a seed from the University of Wisconsin-Madison鈥檚 titan arum plant, affectionately named Big Bucky, in 2002. He cultivated it in a pot on his desk until it grew too large to contain in such a small space. It has grown in a stairwell in the Science and Engineering Building for some time.
A late bloomer at 17, Titan VanCoug鈥檚 first bloom in July 2019 was most likely delayed because its corm (tuber) cloned itself. Corpse flowers put up only one leaf at a time. The pot that contains Titan VanCoug has had as many as four leaves showing at once, evidence that four separate corms are growing together in one pot.
Sylvester retired as associate professor of molecular biosciences in 2021, leaving Instruction and Classroom Support Technician Dawn Freeman in charge of Titan VanCoug鈥檚 care.
About Dawn Freeman
麻豆传媒 alumna and Classroom Support Technician Dawn Freeman manages the support team for undergraduate science labs. She worked closely with Sylvester and took an interest in the corpse flower.
About Steve Sylvester
For more than 36 years Professor Emeritus Steve Sylvester taught a variety of science classes related to the environment and health. Although cultivating Titan VanCoug was not part of Sylvester鈥檚 formal research agenda, he said he found it an interesting pursuit.
Frequently asked questions
Amorphophallus titanum (aka titan arum)
Commonly called a corpse flower or corpse plant
It is native to the limestone hills of Sumatra, Indonesia鈥檚 rainforests, the only place in the world where it naturally grows.
It is among the world鈥檚 largest and rarest flowering structures. The bloom of a titan arum is typically 6 to 8 feet tall (the largest on record was just over 10 feet tall). It emits a foul odor similar to that of rotting flesh, thus the name corpse flower. These plants are uncommon in cultivation and blooms are even rarer鈥攖ypically after 7 to 10 years of growth and just once every 4 or so years afterward throughout a 40-year expected lifespan. The plant also produces the largest leaf in the world, reaching 15 to 20 feet.
After the seed germinates, a small leaf grows from an underground tuber. After 12 鈥 18 months, the leaf dies back and the plant goes into dormancy for 3 鈥 6 months. When a new bud appears, the emerging leaf will be larger than the previous leaf. Meanwhile, the tuber below ground continues to grow, too. The plant goes through many dormancy/leaf cycles throughout its life. On the rare occasion, instead of a leaf emerging from the dormant tuber, a bloom emerges instead.
The odor is meant to attract pollinators and help ensure the continuation of the species. Dung beetles, flesh flies and other carnivorous insects that typically eat dead flesh or lay their eggs in rotting meat are attracted to the titan arum. In Sumatra, the bloom can be located by smell from up to 50 yards away. Sometimes it is so strong people can鈥檛 stand to be near it.
Titan arum blooms quickly鈥攋ust 24 鈥 48 hours after the spathe, or sheath, opens. The spadix鈥攖he central floral spike鈥攃ollapses after three to five days.
If the flower has successfully pollinated, the surrounding spathe eventually falls off, exposing maturing seeds. When ripe, the seeds turn a bright orange-red, which attracts birds that pick them, eat the flesh and discard the "pit" or seed. In this way, the plant is dispersed.
Titan arum is a member of the family araceae, the aroids or arum plants. Other members of this family are the anthuriums, calla lilies, philodendrons and dieffenbachia.