Love Potion of the Desert: Cynomorium

How will you spend February 14? With a partner, or enjoying the golden freedom of being single? As a bachelor, I naturally belong to the latter group. Even if I am not celebrating Valentine's Day with a partner, it does not prevent me from introducing a rather remarkable herb. According to tradition, this plant has played many roles at once: a vampire-like parasite, a love potion, a wound remedy, and even a life-saving emergency food. The plant is known as Cynomorium coccineum.

Figure 1. Dried Cynomorium coccineum（圖片來源：Zanhe，採用 CC BY-SA 4.0 授權）

Cynomorium coccineum belongs to the family Cynomoriaceae and grows across desert regions of Eurasia. Unlike most desert plants, it possesses an unusually strange appearance. Its leaves have degenerated into small scales and the plant contains no chlorophyll at all, making it a true parasite. Instead of producing its own nutrients, it attaches its roots to host plants—particularly members of the families Nitrariaceae, Fabaceae, and Amaranthaceae—and extracts resources directly from them.

Its stem and reproductive structures are equally distinctive. The stem forms a thick, club-shaped structure whose tip expands into a hollow, rounded head covered with scaly bracts and dense inflorescences. Pollination is carried out primarily by desert flies. The overall form is so unusual that at first glance it resembles a fungus more than a plant. Because of this bizarre morphology, botanists historically struggled to determine its proper taxonomic position.

Figure 2. Botanical illustration of Cynomorium from the early twentieth century, drawn by Anton Joseph Kerner von Marilaun and Adolf Hansen（圖片來源：Kurt Stüber，CC0 1.0 公共領域）

The plant had already attracted attention during the era of the Crusades. Members of the Knights Hospitaller encountered it in the Middle East and initially regarded it as a type of mushroom. Specimens were later sent to the Papal court as curiosities. During the eighteenth century, when botanical classification began to develop more systematically, the plant was placed among parasitic flowering plants based on its morphological characteristics.

Modern molecular biology brought a new round of taxonomic debates. Scientists began comparing nuclear, chloroplast, and mitochondrial DNA sequences from many plant groups in order to determine its evolutionary relationships. These analyses eventually suggested that the lineage belongs within the order Saxifragales. However, reaching this conclusion proved unusually difficult. As a parasitic organism, Cynomorium does more than steal nutrients from its hosts—it also acquires genes. Molecular evidence shows that horizontal gene transfer has occurred multiple times between Cynomorium and its host plants during evolutionary history. As a result, portions of its nuclear genome contain foreign genetic material, complicating attempts to reconstruct its ancestry. Only by focusing on the more evolutionarily stable chloroplast and mitochondrial genomes were researchers finally able to clarify its position.

Figure 3. Close-up photograph of a living Cynomorium, showing the dense inflorescences and sepals（圖片來源：Hans Hillewaert，採用 CC BY-SA 3.0 授權）

Compared with its complicated genetic history, the plant's uses in human culture are far more straightforward. In the Ming dynasty herbal classic Bencao Gangmu, it is described as sweet in taste, warm in nature, and non-toxic. Traditional medicine regarded it as a tonic capable of strengthening vitality, nourishing blood, improving bowel function, and relieving weakness. Chinese medicine therefore treated it as a remedy for fatigue, reproductive health, and circulation. In the Arabic pharmacological text Aqrabadhin, the plant was recorded as a treatment for hemorrhoids, bleeding, and menstrual irregularities. Western traditional medicine also attributed a variety of properties to it, including treatments for venereal disease, hemorrhage, contraception, and dysentery.

Modern chemical studies have identified a number of bioactive compounds within the plant. The entire organism contains triterpenoids, ursolic acid, fatty oils, steroids, tannins, and amino acids. The stems in particular contain anthocyanins and triterpenoid saponins. These compounds appear to contribute to digestive relief and may stimulate certain immune responses.

Figure 4. Ruins of Suoyang City（圖片來源：Zanhe，採用 CC BY-SA 4.0 授權）

Beyond its medicinal value, Cynomorium also played an important role as an emergency food for travelers crossing desert regions. Historical stories describe caravans and armies relying on it during times of scarcity. One well-known Chinese legend recounts that the Tang dynasty general Xue Rengui was once trapped by enemy forces in Kuyucheng. When he ordered soldiers to dig wells in search of water, they unexpectedly unearthed large quantities of Cynomorium. The plant not only provided moisture but also served as a temporary food supply. After the siege ended in victory, the city was renamed Suoyang City in honor of the plant that had helped save their lives.

In the West, the Knights Hospitaller likewise regarded the plant as a sacred herb. They carried it with them as an emergency medicinal resource. On the island of Malta, crusaders reportedly even leveled part of a hill to make it easier to guard cultivated plants and prevent theft.

After hearing these stories, perhaps this unusual desert parasite seems a little less mysterious. If you ever have the opportunity, take a walk through a traditional herbal market and look for this remarkable plant. This is Rodrigo, and I will see you next time.

Author: Rodrigo

Reference:

1. Angiosperm Phylogeny Group (2009). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III". Botanical Journal of the Linnean Society.

2. Subhuti Dharmananda, Ph.D., plus The Treasure of Tarthuth, by R.W. Lebling, Jr. (2011)ITM Online: CYNOMORIUM: Parasitic Plant Widely Used in Traditional Medicine.