Unité de Malherbologie & Agronomie Weed Science & Agronomy INRA-Dijon

Bayer Code : lampu

Scientific name: Lamium purpureum L.

Synonym(s) of Sc. name:

Classification: Labiatae

Common name: red dead-nettle

Synonym(s) of Common name:

Name per country: DE : Rote Taubnessel ; ES : ortiga muerta ; FR : lamier pourpre ; IT : falsa ortica purpurea ; PT : lâmio-roxo ; EN : red dead-nettle ; NL : paarse dovenetel, NL : purper netel ; DK :

Biological type: Annual

Seed:

.

Seedling:

- Cotyledons auriculate.

- Leaves entire, rounded, with distal teeth.

Adult plant:

- Height: 10-30 cm. Plant pubescent.

- Stems diffuse, ascending, tuft-like branched, often red-purple-tinted.

- Leaves opposite, rounded to cordate, long-stalked, crenate. Numerous veins, reticulate. Upper leaves short-stalked and often red-tinted near the inflorescence, closed in a pyramide.

- Flowers crimson, 6-10 in 3-7 pseudo-whorls distal then very closed et the end of the stem. Flowers markedly 2-lipped with a upper lip of 3.5 mm, downy and inflated in semi-sphere and a longer lower lip.

- Fruit : achene 2-2.5 mm, usually grey and smooth, scarcely minutely wrinkled.

- Plant melliferous, astringent, vulnerary, used against catarrh and scrofulas. Plant foetid.

- Risk of confusion with Lamium hybridum Vill. (has dentate bracts ), Lamium amplexicaule L. (has sessile bracts).

- Biological type: Annual.

Mistake with: Lamium hybridum , Lamium amplexicaule

Ecological profile (click on flags):   Present       Present       Present       Present       Present       Present       Present     lampuPresent    

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http://www.dijon.inra.fr/bga/hyppa/hyppa-a/lampu_ah.htm ,