Family: Lamiaceae
Teucrium
Citation:
L., Sp. Pl. 562 (1753).
Synonymy: Not Applicable Common name: Germanders, teucriums.
Description:
Perennial herbs or shrubs with quadrangular branches, with simple hairs, rarely branched ones and usually with sessile glands; leaves sessile or petiolate, opposite, simple or 3-foliate, entire, serrate or lobed.
Inflorescence a thyrse with cymose part-inflorescences stalked and with many flowers reduced to few flowers subsessile to sessile, with subtending bracts leaf-like but decreasing upwards; sepals regularly connate, with 5 equal lobes; corolla 1-lipped, with 2 posterior and 2 lateral lobes equal or almost so and with a usually considerably larger anterior lobe; stamens 4 fertile, inserted near the base of the corolla tube; anthers with 2 cells fertile and strongly diverging, with filaments curved from posterior to anterior above the lip; ovary 4-lobed, with 1 basal ovule in each locule, with a gynobasic style and a terminal 2-fid stigma.
Fruit usually with 4 mericarps each narrowly oblong-obovoid, scarcely or not keeled on the inside, with the attachment scar a large concavity on the lower half of the inner surface.
Distribution:
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A cosmopolitan genus of about 300 species but well represented in the Mediterranean; about 13 species native to Australia.
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Biology:
No text
Key to Species:
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T. albicaule 1. |
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2. Leaves entire, undulate or unevenly recurved |
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T. racemosum 4. |
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2. Leaves lobed or toothed |
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3. Internodes scarcely elongated and not visible between successive pairs of part-inflorescences; tufted herbs with a root stock |
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T. sessiliflorum 5. |
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3. Internodes elongating and visible between successive pairs of part-inflorescences; shrubs |
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4. Leaves petiolate at least on lower parts; blade lanceolate rarely ovate |
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T. corymbosum 2. |
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4. Leaves sessile, obovate, often with a long cuneate base |
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T. grandiusculum 3. |
Author:
Not yet available
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