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A report published by Laidback Gardener on Oct. 12 describes thermogenesis, the ability of some plants to generate heat in their reproductive structures. Examples include skunk cabbage, lotus, titan arum and cycads, where heat can help spread scent or benefit pollinating insects.
Some flowers and other plant reproductive structures generate their own heat, a process known as thermogenesis, according to a report published Oct. 12 by Laidback Gardener. The report, reproduced with permission from the Friends of the Montréal Botanical Garden, describes how species including skunk cabbage, lotus and titan arum use warmth to help release scent and interact with pollinating insects.
In skunk cabbage (Symplocarpus foetidus), emerging growth in late winter can bring the plant’s internal temperature to nearly 30 degrees Celsius above the surrounding air, according to the report. The plant grows in wet woodlands and produces its inflorescence inside a thick, reddish-brown spathe. That structure can retain warmth as a miniature greenhouse, helping the plant flower while snow and cold remain nearby.
The heat also helps disperse the plant’s strong, putrid odour, which can attract pollinators when insects are beginning to emerge from winter dormancy. The report says thermogenesis has been documented in 14 plant families; the Araceae family alone includes more than 100 species known to produce heat. Researchers continue to identify additional examples.
Heat production appears in several different pollination strategies. Giant water lilies and sacred lotus warm their flowers at night, helping release fragrance that attracts beetles. The report says insects may remain inside flowers overnight, gaining warmth before moving pollen when the flower reopens. The titan arum, meanwhile, can heat its inflorescence to about 32 degrees Celsius; its scent and heat are thought to attract insects associated with carrion.
How Warmth Supports Pollination
Thermogenesis shows that heat can serve plants as more than a response to cold. In the examples described, it is part of the reproductive process: warmth can carry scent, attract insects and provide them with a more favourable place to remain active. These interactions can help move pollen between flowers and support plant reproduction.
The strategy matters to readers because it links familiar botanical observations—such as an early spring flower or a strong floral odour—to mechanisms that are not visible from appearance alone. It also illustrates convergent evolution: heat production occurs in unrelated plant groups, apparently in response to similar reproductive pressures. The report says some researchers have proposed that heat production may occur more broadly across plants, though its intensity varies; that proposal is not presented as a settled finding.
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Examples Across Plant Groups
The report’s examples span wetland plants, aquatic flowers, tropical species and cycads. Skunk cabbage is a rhizomatous perennial of peaty or very wet woodland, and the article says specimens can be seen in the Montréal Botanical Garden’s First Nations Garden. Its early flowering, enclosed by a spathe, offers one example of warmth helping a plant function in cold conditions.
Lotus and giant water lilies use a different sequence. According to the report, a flower’s temperature rises as it prepares to open at night, and a later heat peak may help dry the stamens so pollen can be released. Titan arum stores energy in a large tuber and channels odour through its tall, fleshy spadix. Cycads, an ancient group with separate male and female plants in many species, are also described as largely thermogenic. The report says their cones emit infrared radiation that may help insects locate them.
The article is an adapted reproduction of material originally published in Quatre-Temps, the Friends of the Montréal Botanical Garden’s publication. Its account presents thermogenesis as an energy-intensive adaptation and notes that the inventory of heat-producing plants continues to grow.
““This process, called thermogenesis, is an adaptation found in several plant species.””
— Laidback Gardener report
Open Questions in Plant Heat
The report does not identify the researchers behind the proposal that thermogenesis may be common across the plant kingdom, nor does it detail the evidence or limits of that proposal. It also describes some functions cautiously: heat may help dry lotus stamens, and infrared emissions from cycad cones may act as thermal beacons. Those explanations should not be read as established for every species.
The article does not provide a full list of the 14 documented plant families or explain how researchers determine which species qualify as thermogenic. The degree to which heat production helps plants expand into colder regions is also described as a possibility, rather than a confirmed general effect.
Further Research on Thermogenic Plants
The report gives no specific future study, announcement or research timetable. It says the number of known thermogenic species and plant groups continues to grow as discoveries are made. Further research would be needed to test how widespread low-level heat production is, and to distinguish measured effects from proposed roles in scent release, pollinator behaviour and plant distribution.
For now, the article’s account focuses on established examples and qualified explanations rather than a new scientific finding. Readers can expect the picture to develop as researchers study more species and the interactions between plant temperature and pollinators.
Key Questions
What is thermogenesis in plants?
Thermogenesis is the production of heat by a plant. The report describes it in reproductive structures, including flowers and cones, in a range of species.
Why does skunk cabbage produce heat?
According to the report, its warmth helps the plant flower in late winter and disperses its strong odour, which can attract pollinators as insects emerge from winter dormancy.
Which other plants are described as heat-producing?
The report names giant water lily, sacred lotus, titan arum and cycads, among other examples. It says thermogenesis has been documented in 14 plant families.
Is plant thermogenesis common across all plants?
That is not established by the report. It says some researchers have proposed that heat production may occur throughout the plant kingdom, but that it is not equally pronounced in all plants.
Source: rss
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