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Genus Teucrium Family Lamiaceae

Synonyms: Teucridium Hook.f. APNI*
Spartothamnella Briq. APNI*

Description: Perennial herb or shrub; branches 4-angular; hairs simple, rarely branched; sessile glands usually present.

Leaves opposite, simple or 3-foliolate, margins entire, toothed or lobed; sessile or petiolate.

Sepals 5, mostly regularly fused; lobes ± acute. Corolla 1-lipped, with upper lobe reduced; mostly white to cream-coloured. Stamens 4, fertile, usually greatly exserted; anthers 2-locular and strongly divergent. Ovary scarcely 4-lobed; style inserted near apex of ovary; stigma 2-fid.

Mericarps slightly keeled or ± smooth.


Distribution and occurrence: World: c. 250 species, cosmopolitan with the Mediterranean region as a centre of diversity. Australia: c. 13 species (endemic), all States.

This genus now includes the species Teucrium junceum and Teucrium puberulum, two species previously included in the genus Spartothamnella, family Chloanthaceae; and Teucrium betchei previously Oncinocalyx betcheri in the family Verbenaceae.

Text by B. J. Conn: updated L. Murray Sep (2018) Key updated based on Bean (2018) Muelleria 37: 3 and Conn (1992) Flora of NSW Vol 3.
Taxon concept: APG IV

 Key to the species 
1Branchlets glabrousTeucrium junceum
Branchlets sparsely to very densely hairy2
2Inflorescence a terminal spike or raceme; corolla mauve to purple3
Inflorescence axillary, solitary or cymose, corolla white
                       Back to 1
3Petioles wingedTeucrium daucoides
Petioles not winged
                       Back to 2
Teucrium argutum
4Flowers sessile; calyx lobes slender and hooked at apex5
Flowers pedicellate; calyx lobes triangular, not hooked
                       Back to 2
5Leaves simple and linear, entire6
Leaves deeply lobed
                       Back to 4
Teucrium sessiliflorum
6Plant covered in simple hairs; corolla 5–7 mm long, whiteTeucrium betchei
Plant covered with ± stellate hairs; corolla 2.5–3 mm long, greenish white
                       Back to 5
Teucrium puberulum
7Inflorescence 5–20-flowered8
Inflorescence 1–3-flowered
                       Back to 4
8Leaves narrow-ovate; inflorescence, leaves and branches densely covered with short mostly antrorse simple hairsTeucrium corymbosum
Leaves ovate; inflorescence, leaves and branches densely covered with long, spreading multicelular gland-tipped hairs
                       Back to 7
Teucrium sp. D sensu Conn (1992)
9Corolla up to 6 mm longTeucrium albicaule
Corolla 8–14 mm long
                       Back to 7
Teucrium racemosum

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