Styrax officinalis

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Blossoms of the Storax tree (Styrax officinalis)

Styrax officinalis is a deciduous shrub reaching a height of 2–5 metres (6 ft 7 in – 16 ft 5 in). It has a simple, relaxed form, with very thin elliptical leaves 5–10 cm (2–4 in) long and 3.5–5.5 cm (1+1⁄2–2 in) wide, alternate and widely spaced on thin, reddish stems, with a tight, dark bark on basal stems. A small very light green, stalked axillary bud is associated with each leaf.

This plant is the "official" source of styrax, an herbal medicine known from ancient times. Some believe its oleoresin to have been the stacte used together with frankincense, galbanum, and onycha to make Ketoret, the Tabernacle incense of the Old Testament.