Osmanthus Flowers桂花

Classification and Origin

sweet osmanthus, Osmanthus fragrans, family Oleaceae.

opened flowers (inflorescences), harvested and dried.

Origin: Guangxi, Hubei, Zhejiang, as well as Yunnan, Sichuan, Jiangsu and other subtropical regions.

Type: herbal floral infusion, "tea substitute" (代用茶, dàiyòng chá).

Facts

the character 桂 (guì) itself is polysemous and can refer to cinnamon/cassia (肉桂, ròuguì — cassia, as well as the famous Wuyishan oolong), but 桂花 (guìhuā) specifically means the osmanthus flower, not the spice.

osmanthus has been chosen as the floral emblem of several Chinese cities and is firmly tied to the autumn atmosphere.

despite the tiny size of the flowers, their scent is noticeable from a distance, which has made the plant a favourite in gardens and parks.

the same flower functions both as an infusion and as a flavouring for desserts, wine and syrups.

History and Culture

the legend of the woodcutter Wu Gang (吴刚, Wú Gāng), condemned to eternally chop an osmanthus tree growing on the moon, and the moon goddess Chang'e (嫦娥, Cháng'é).

the idiom "to break off an osmanthus branch in the Moon Palace" (蟾宫折桂, chán gōng zhé guì) signified success in the imperial examinations, i.e. the highest life achievement.

candied osmanthus (糖桂花, táng guìhuā), osmanthus cakes (桂花糕, guìhuā gāo) and osmanthus wine (桂花酒, guìhuā jiǔ).

Botany and Raw Material

evergreen shrub or small tree, typically up to 3–10 m in height.

leathery, opposite, lanceolate, with a smooth or finely serrated margin.

very small (about 4–5 mm), clustered in the leaf axils, with an extraordinarily strong fragrance despite their small size.

from white and cream to golden-yellow and orange-red — depending on the cultivar group.

Terroir

karst landscape, warm humid climate, historical connection with osmanthus culture.

one of the recognised centres of cultivation, the city is consistently associated with osmanthus.

Manjuelong Village (满觉陇, Mǎnjuélǒng) is famous for its osmanthus groves and the autumn "rain of petals."

Production

at the peak of bloom, usually early in the morning when the fragrance is fullest.

removal of twigs, leaves and debris, discarding darkened flowers.

at low temperature or in the shade to preserve colour and volatile aromatic compounds.

by purity, wholeness and uniformity of colour.

Organoleptic Profile

small opened flowers, ranging from golden-yellow to cream or orange-ish hues.

sweet, floral-fruity, with apricot-peach and honey notes.

from nearly clear to light golden.

Taste: mild, slightly sweet, without pronounced astringency; a long floral aftertaste remains in the mouth.

Chemical Composition

γ-decalactone, to which the characteristic apricot-peach note is often attributed.

determine the golden and orange colouring of the flowers.

substances typical of plant raw materials.

Essential Oils: linalool and its oxides, β-ionone (violet nuance), dihydro-β-ionone.

Health Notes

Health: Health Properties

In Chinese everyday tradition, osmanthus is ascribed a "warming" character, the ability to freshen breath and gently support digestion; it is often added to tea and infusions for its aroma and "warm" sensation, especially in the cool season. Modern science studies the antioxidant activity of compounds contained in the flowers and their aromatic properties; however, these are compositional studies and model experiments, not confirmation of the beverage's therapeutic effect.

A direct disclaimer is necessary: osmanthus flowers are a food product, not a medicine, and no medical promises should be made. Health claims made in retail advertising fall outside the scope of an encyclopedia. As with any herbal infusion, moderation and caution are sensible during pregnancy, when taking medications and in cases of individual intolerance; when in doubt, it is appropriate to consult a specialist. These points are stated here neutrally, without dosages or recommendations.

Brewing

approximately 2–4 g of dried flowers per 200–250 ml of water; as an aromatic addition to tea — noticeably less.

about 85–90 °C; boiling water coarsens the delicate aroma.

first infusion about 1–2 minutes, then to taste.

the flowers withstand several short brewings, gradually yielding their aroma.

Teaware: a glass cup or gaiwan allows one to admire the unfolding of the flowers; a small teapot is also suitable.

Storage

Container: airtight packaging or a tightly closed jar.

a dry, cool place, away from light and foreign odours.

moisture, heat, light and oxygen — these destroy volatile aromatic compounds.

Price and Authenticity

around 340 ¥/kg for quality dried material; this is an order of magnitude, not a retail price.

designations like "AAA" indicate a higher selection — large, whole, uniformly coloured flowers with a bright aroma.

many twigs, leaves and debris lower the grade.

an unnaturally bright, "shouting" colour and tinted water upon rinsing are alarming signs.

faded colour, weak or musty aroma.

what is sometimes sold under the name "osmanthus" is precisely 桂花乌龙 or 桂花红茶 — that is, tea with an additive, not pure flowers.