Leiden University Library - Seikei Zusetsu vol

''Petasites japonicus'', also known as butterbur, giant butterbur, great butterbur and sweet-coltsfoot, is an

herb In general use, herbs are a widely distributed and widespread group of plants, excluding vegetables and other plants consumed for macronutrients, with savory or aromatic properties that are used for flavoring and garnishing food, for medicinal ...

aceous

perennial plant A perennial plant or simply perennial is a plant that lives more than two years. The term ('' per-'' + '' -ennial'', "through the years") is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also wide ...

in the family

Asteraceae The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...

. It is native to China, Japan, Korea and Sakhalin and introduced in Europe and North America. It was introduced to southern

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

in Canada by Japanese migrants. It is

dioecious Dioecy (; ; adj. dioecious , ) is a characteristic of a species, meaning that it has distinct individual organisms (unisexual) that produce male or female gametes, either directly (in animals) or indirectly (in seed plants). Dioecious reproductio ...

, with male and female flowers produced on separate individuals. Occasionally, morphologically hermaphroditic (but functionally sterile) flowers exist.

Uses

The traditional preparation method for this vegetable involves pre-treating with ash or baking soda and soaking in water to remove harshness (

astringency An astringent (sometimes called adstringent) is a chemical that shrinks or constricts body tissues. The word derives from the Latin ''adstringere'', which means "to bind fast". Calamine lotion, witch hazel, and yerba mansa, a Californian plant ...

), which is a technique known as . The shoot can be chopped and stir fried with

miso is a traditional Japanese seasoning. It is a thick paste produced by fermenting soybeans with salt and ''kōji'' (the fungus ''Aspergillus oryzae'') and sometimes rice, barley, seaweed, or other ingredients. It is used for sauces and spread ...

to make ''fuki-miso'' which is eaten as a

relish A relish is a cooked and pickled product made of chopped vegetables, fruits or herbs and is a food item typically used as a condiment to enhance a staple. Examples are chutneys and the North American relish, a pickled cucumber jam eaten with ho ...

thinly spread over hot rice at meals. The bulb-like shoots are also picked fresh and fried as

tempura is a typical Japanese dish usually consisting of seafood, meat and vegetables that have been battered and deep fried. The dish was introduced by the Portuguese in Nagasaki through fritter-cooking techniques in the 16th century. The word ''tem ...

. In Korea, it is steamed or boiled and then pressed to remove water.

Sesame oil Sesame oil is an edible vegetable oil derived from sesame seeds. The oil is one of the earliest-known crop-based oils. Worldwide mass modern production is limited due to the inefficient manual harvesting process required to extract the oil. O ...

perilla oil Perilla oil ( ''Deulgireum'') is an edible vegetable oil derived from perilla seeds. Having a distinct nutty aroma and taste, the oil pressed from the toasted perilla seeds is used as a flavor enhancer, condiment, and cooking oil in Korean cuisine. ...

is added in order to make

namul Namul ( ko, 나물) refers to either a variety of edible grass or leaves or seasoned herbal dishes made of them. Wild greens are called ''san-namul'' (, "mountain namul"), and spring vegetables are called ''bom-namul'' (, "spring namul"). On t ...

Toxicity

Like other ''

Petasites ''Petasites'' is a genus of flowering plants in the sunflower family, Asteraceae, that are commonly referred to as butterburs and coltsfoots.pyrrolizidine alkaloid Pyrrolizidine alkaloids (PAs), sometimes referred to as necine bases, are a group of naturally occurring alkaloids based on the structure of pyrrolizidine. Pyrrolizidine alkaloids are produced by plants as a defense mechanism against insect he ...

s (PAs) which have been associated with cumulative damage to the

liver The liver is a major Organ (anatomy), organ only found in vertebrates which performs many essential biological functions such as detoxification of the organism, and the Protein biosynthesis, synthesis of proteins and biochemicals necessary for ...

and

tumor A neoplasm () is a type of abnormal and excessive growth of tissue. The process that occurs to form or produce a neoplasm is called neoplasia. The growth of a neoplasm is uncoordinated with that of the normal surrounding tissue, and persists ...

formation. It also contains the

carcinogenic A carcinogen is any substance, radionuclide, or radiation that promotes carcinogenesis (the formation of cancer). This may be due to the ability to damage the genome or to the disruption of cellular metabolic processes. Several radioactive substan ...

PA petasitenine. The concentration of

hepatotoxic Hepatotoxicity (from ''hepatic toxicity'') implies chemical-driven liver damage. Drug-induced liver injury is a cause of acute and chronic liver disease caused specifically by medications and the most common reason for a drug to be withdrawn fro ...

PAs can be reduced to a concentration below detection limits with a proper extraction process. Since many alkaloids are bitter, traditional methods of preparation may have evolved to remove them.

Animal studies

Certain extracts of ''Petasites japonicus'' have found to be anti-inflammatory in a study of asthma in mice. Based on additional studies in mice, the plant may contain blood

plasma Plasma or plasm may refer to: Science * Plasma (physics), one of the four fundamental states of matter * Plasma (mineral), a green translucent silica mineral * Quark–gluon plasma, a state of matter in quantum chromodynamics Biology * Blood pla ...

and hepatic lipid-lowering and antioxidant compounds.

Folklore

The

Ainu people The Ainu are the indigenous people of the lands surrounding the Sea of Okhotsk, including Hokkaido Island, Northeast Honshu Island, Sakhalin Island, the Kuril Islands, the Kamchatka Peninsula and Khabarovsk Krai, before the arrival of the Y ...

refer to the previous inhabitants of

Ezo (also spelled Yezo or Yeso) is the Japanese term historically used to refer to the lands to the north of the Japanese island of Honshu. It included the northern Japanese island of Hokkaido, which changed its name from "Ezo" to "Hokkaidō" in 18 ...

as the

Korpokkur Korpokkur ( ain, コㇿポックㇽ; ja, コロポックル, translit=Koropokkuru), also written Koro-pok-kuru, korobokkuru, korbokkur, or koropokkur,Ainu-Grammatik, vol.2 Hans Adalbert Dettmer, O. Harrassowitz, 1997 koro-pok-guru, are a race of ...

or "people who dwelt below ground"; the name can also be interpreted as "people beneath the fuki", and so they are popularly associated with fuki leaves in art and mythology. More fantastic depictions of the Korpokkur portray them as tiny, fairy-like creatures small enough to use the leaves as roofs or umbrellas.

References

External links

* * *
Recipes from Yasuko-san's Home Cooking

{{Authority control Flora of Japan Japanese cuisine Perennial vegetables

japonicus This list of Latin and Greek words commonly used in systematic names is intended to help those unfamiliar with classical languages to understand and remember the scientific names of organisms. The binomial nomenclature used for animals and plants i ...

Plants used in traditional Chinese medicine Plants described in 1866