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See today's 3 km queue in Sydney to see rare huge bloom of Titan Arum or Corpse flower (see inset) that blooms every 10 years. Bloom lasts only a day and smells of rotting meat to attract flies for pollination. See video on my YouTube channel - link below

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Amorphophallus titanum, the titan arum or Corpse flower, is a flowering plant in the family Araceae. It has a large unbranched inflorescence; a tall single leaf, branched like a tree; and a heavy tuber which enables the plant to produce the inflorescence. A. titanum is endemic to rainforests on the Indonesian island of Sumatra.

Because its flower blooms infrequently and only for a short period, it gives off a powerful scent of rotting flesh to attract pollinators. As a consequence, it is characterized as a carrion flower, earning it the names corpse flower or corpse plant.

After some years, when the tuber is sufficiently large, the titan arum develops an inflorescence instead of a leaf. This inflorescence can reach over 3 m (10 ft) in height. Like the related cuckoo pint and calla lily, it consists of a fragrant spadix of flowers wrapped by a spathe, which looks like a large petal. The spathe is deep green on the outside and dark burgundy red on the inside, with a deeply furrowed texture. The spadix is almost hollow and resembles a large baguette. Near the bottom of the spadix, hidden from view inside the sheath of the spathe, the spadix bears two rings of small flowers. The upper ring bears the male flowers and the lower ring is spangled with the bright red-orange carpels of female flowers. The female flowers open first, and the male flowers open a day or two later. This timing usually prevents the flower from self-pollinating.

As the spathe gradually opens, the spadix heats up to 37 °C (99 °F), and rhythmically releases a powerful odor to attract carrion insects which feed on or lay their eggs in rotting meat. The potency of the odor gradually increases from late evening until the middle of the night, when carrion beetles and flesh flies are active as pollinators, then tapers off towards morning. Analyses of chemicals released by the spadix show the stench includes dimethyl trisulfide (like limburger cheese), dimethyl disulfide (garlic), trimethylamine (rotting fish), isovaleric acid (sweaty socks), benzyl alcohol (sweet floral scent), phenol (like Chloraseptic), and indole (like feces). The odor is detectable up to a half mile (0.8 km) away. The inflorescence's deep red color and texture contribute to the illusion that the spathe is a piece of meat. During bloom, the tip of the spadix is roughly human body temperature, which helps the perfume volatilize. The heated spadix creates a micro-convection in the cool ambient air, enhancing the transport of the scent. The heat also helps to convince carrion-feeding insects that a dead body is present, attracting them to the inflorescence. S_2550

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Uploaded on January 24, 2025
Taken on January 24, 2025