Polygonatum
The rhizome of Solomon’s seal, roasted and brewed as dunggulle-cha, one of the everyday hot drinks of Korea and a fixture of restaurant water jugs. Roasting turns it deeply nutty and it is one of the most immediately likeable botanicals in this file.
Identity
- Botanical name
- Polygonatum odoratum
- Family
- Asparagaceae
- Part used
- Rhizome
- Origin
- Korea, Japan, China and temperate Eurasia
- Drunk in
- Korea, Japan, Northern China
Character
Nutty, sweet and toasty, closer to roasted barley than to anything root-like. It is very easy to drink and has none of the bitterness the category usually carries.
Notes: roasted grain, caramel, nuts
History
Long used across East Asia as a food and a drink and cultivated in Korea at scale for the tea trade. Roasted dunggulle-cha as a packaged everyday product is a twentieth-century development of a much older domestic practice.
How it is drunk
Served free in Korean restaurants in place of water, brewed at home by the jug and drunk hot in winter and cold in summer. It is close to a national background drink and few people think of it as a herbal infusion at all.
Production
Rhizomes are steamed, sliced and roasted until brown, and the depth of roast sets the flavour completely. Unroasted material is bland and slightly mucilaginous; well-roasted material is nutty and sweet.
Preparation
Decoction · Infusion
Boiling and decoction
1–3 g/100 ml · 98–100 °C · 10 min
What gets confused
Several Polygonatum species are used and the roast level varies far more than the species does. Pale material has been under-roasted and tastes of very little.
Common mistakes
- Judging it by unroasted material, which is bland. The roast is what makes the drink.
Related botanicals
- Mugicha — Roasted, nutty, sweet drinks served in place of water across Korea and Japan.
- Marshmallow root — Mild rhizome and root materials that contribute body rather than flavour, and both are nearly tasteless next to anything assertive.
Comparisons
- Kudzu vs polygonatum — Two East Asian roots that produce entirely different kinds of drink. One is a starch whisked into a hot gel; the other is roasted and brewed into what Korea serves instead of water.
- Polygonatum vs barley tea — Two roasted, nutty, sweet drinks served in place of water across Korea and Japan. One is a rhizome and the other a grain, and in the cup they are closer than that suggests.
- Ginseng vs polygonatum — Two East Asian roots at opposite ends of the price range, both simmered, and only one of them is something anyone drinks by the jug.
- Marshmallow root vs polygonatum — Two mild roots that contribute body rather than flavour, one extracted cold and one roasted, and both nearly invisible next to anything assertive.
Evidence for this page
This page is TeaHQ synthesis throughout. No external source stands behind any statement on it, including the botanical name. Twenty of the 150 botanicals have had their names and distribution checked against a taxonomic authority and this is not one of them.
Brewing parameters here are typical practice for the category rather than measurements of this plant, and each set says so.
This page makes no safety claim. It describes what Polygonatum is, where it comes from and how it is prepared — not what it does to a person. The absence of a safety note here is not a statement that the plant is safe. How TeaHQ handles this.