Galeopsis ladanum L.

Red hempnettle (en), Galéopsis ladanum (fr), Chanvre sauvage (fr), Galéopse ladanum (fr)

Species

Angiosperms > Lamiales > Lamiaceae > Galeopsis

Characteristics

Stems freely branched, 1–4 dm, finely pubescent with minute, recurved hairs, often with spreading glandular hairs as well, but not hispid-setose; lvs 1.5–3 cm; verticils usually 2–4, few-fld; cal-lobes half as long as the canescent tube, only 3 mm even in fr; cor deep pink, 15–28 mm; 2n=16. Native of Eurasia, intr. in waste places or along the seashore, chiefly in the coastal states, but sometimes inland to Wis. June–Sept. Var. ladanum has lanceolate to ovate lvs to 15 mm wide and crenate-serrate with a few low teeth. (Var. latifolia) Var. angustifolia (Ehrh.) Wallr., much more common with us, has mostly linear and entire lvs rarely over 5 mm wide. (G. angustifolia)
More
Herb; stems to c. 40 cm tall, not swollen at nodes, reddish at least in dried material, uniformly covered in short, soft, crispate hairs. Cauline lvs with petioles to 1 cm long, with hairs as on stems; lamina 1.7-3 × 0.5-1.6 cm, lanceolate-ovate, with appressed hairs, and with 3-5, crenate-serrate teeth on each side; base cuneate; apex acute. Bracteoles hairy, mostly much < calyx. Calyx 8-10 mm long, with patent hairs, glandular; teeth triangular with spiny apex. Corolla 15-18 mm long, probably pink, densely hairy outside; tube much exserted from calyx; middle lobe of lower lip broad, ± rounded. Nutlets c. 2.5 mm long, obovoid.
Life form annual
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination entomogamy
Spread epizoochory
Mature width (meter) -
Mature height (meter) 0.6
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

A rare introduction on cultivated land in Britain.
Light 4-9
Soil humidity 4-6
Soil texture 1-7
Soil acidity 3-7
Soil nutriment -
Hardiness (USDA) 4-9

Usage

Uses medicinal oil poison
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by seedlings.
Mode seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Galeopsis ladanum habit picture by Sloeniy Sloeniy (cc-by-sa)
Galeopsis ladanum habit picture by tigroo (cc-by-sa)
Galeopsis ladanum habit picture by jeclerencia (cc-by-sa)

Leaf

Galeopsis ladanum leaf picture by Pietro Brignoli (cc-by-sa)
Galeopsis ladanum leaf picture by Frederic Vieilledent (cc-by-sa)
Galeopsis ladanum leaf picture by Magalie Delalande (cc-by-sa)

Flower

Galeopsis ladanum flower picture by Siegfried Brenner (cc-by-sa)
Galeopsis ladanum flower picture by François André (cc-by-sa)
Galeopsis ladanum flower picture by Cyllène Chatellier (cc-by-sa)

Distribution

Galeopsis ladanum world distribution map, present in Albania, Austria, Bulgaria, Belarus, Canada, Switzerland, Colombia, Czech Republic, Germany, Denmark, Spain, Finland, France, Micronesia (Federated States of), Greece, Hungary, Italy, Kyrgyzstan, Malaysia, Netherlands, Norway, New Zealand, Poland, Romania, Russian Federation, Sweden, Turks and Caicos Islands, Ukraine, United States of America, and Uzbekistan

Identifiers

LSID urn:lsid:ipni.org:names:447083-1
WFO ID wfo-0000967997
COL ID 3F3Y7
BDTFX ID 28787
INPN ID 99305
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Lamium ladanum Dalanum ladanum Galeopsis segetum Galeopsis grandiflora Ladanum intermedium Ladanella ladanum Ladanum purpureum Tetrahit ladanum Galeopsis ladanum var. glandulosa Galeopsis ladanum subsp. filholiana Galeopsis intermedia var. longiflora Galeopsis ladanum var. major Galeopsis ladanum subsp. intermedia Galeopsis ladanum var. kerneri Galeopsis ladanum var. intermedia Galeopsis ladanum var. abundantiaca Galeopsis ladanum subsp. latifolia Galeopsis ladanum var. simplex Galeopsis pyrenaica var. nana Galeopsis ladanum var. ladanum Galeopsis ladanum

Lower taxons

Galeopsis ladanum subsp. angustifolia Galeopsis ladanum subsp. ladanum Galeopsis ladanum subsp. carpetana