Jepson eFlora: Taxon page
Key to families | Table of families and genera
Previous taxon Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Next taxon
Lamium amplexicaule

Higher Taxonomy
Family: Lamiaceae (Labiatae)View DescriptionDichotomous Key

Common Name: MINT FAMILY
Habit: Annual to shrub [tree, vine], glabrous to hairy, generally aromatic. Stem: generally erect, generally 4-angled. Leaf: generally simple to deeply lobed, generally opposite, generally gland-dotted. Inflorescence: generally cymes, generally many in dense axillary clusters surrounding stem, generally separated by evident internodes or collectively crowded, spike- or panicle-like, occasionally head-like or raceme, subtended by leaves or bracts; flowers sessile or pedicelled. Flower: generally bisexual; calyx generally 5-lobed, radial to bilateral; corolla generally bilateral, 1--2-lipped, upper lip entire or 2-lobed, +- flat to hood-like, occasionally 0, lower lip generally 3-lobed; stamens generally 4, epipetalous, generally exserted, paired, pairs generally unequal, occasionally 2, staminodes 2 or 0; ovary superior, generally 4-lobed to base chambers 2, ovules 2 per chamber, style 1, generally arising from center at junction of lobes, stigmas generally 2. Fruit: generally 4 nutlets, generally ovoid to oblong, smooth.
Genera In Family: +- 230 genera, 7200 species: worldwide. Many cultivated for herbs, oils (Lavandula, lavender; Mentha, mint; Rosmarinus, rosemary; Thymus, thyme), some cultivated as ornamental (in California Cedronella, Leonotis, Monarda, Phlomis). Note: Moluccella laevis L., shell flower, historical waif in California. Satureja calamintha (L.) Scheele subsp. ascendens (Jordan) Briq. reported as alien but not naturalized. Salazaria moved to Scutellaria; California Hyptis moved to Condea, California Satureja moved to Clinopodium.
eFlora Treatment Author: Dieter H. Wilken & Margriet Wetherwax, family description, key to genera
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: LamiumView DescriptionDichotomous Key

Common Name: DEAD NETTLE
Habit: Annual [perennial herb], glabrous to hairy. Stem: decumbent to erect; base generally branched. Leaf: petioled to sessile; blade generally ovate to round or reniform, entire to toothed. Inflorescence: terminal and axillary, each head-like, subtended by leaves. Flower: calyx 5-lobed, lobes +- equal, generally acuminate; corolla 2-lipped, upper lip hood-like, lower lip +- 3-lobed, lateral lobes < central; stamens 4, fertile, generally enclosed by upper lip, anthers generally hairy; style +- equally 2-lobed. Fruit: nutlets triangular in ×-section, truncate distally.
Species In Genus: 40 species: temperate Eurasia, northern Africa. Etymology: (Latin: ancient name)
eFlora Treatment Author: John M. Miller & Dieter H. Wilken

Lamium amplexicaule L.
Stem: 1--4 dm. Leaf: blade 1--2.5 cm, wide-ovate to +- round, base truncate to lobed, margin crenate to +- lobed. Flower: calyx 4--7 mm; corolla generally 10--18 mm, red-purple. Chromosomes: 2n=18.
Ecology: Disturbed sites, cultivated or abandoned fields; Elevation: < 800 m. Bioregional Distribution: CA-FP; Distribution Outside California: widespread North America; native to Eurasia. Flowering Time: Apr--Sep Note: Cleistogamous flower corollas < 8 mm, generally not opening.
eFlora Treatment Author: John M. Miller & Dieter H. Wilken
Jepson Online Interchange

Previous taxon: Lamium
Next taxon: Lamium purpureum

Name Search
botanical illustration including Lamium amplexicaule


Citation for this treatment: John M. Miller & Dieter H. Wilken 2016. Lamium amplexicaule, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 02, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 02, 2016.

Lamium amplexicaule
click for enlargement
© 2003 Michael Charters
Lamium amplexicaule
click for enlargement
© 2007 Neal Kramer
Lamium amplexicaule
click for enlargement
© 2009 Barry Breckling
Lamium amplexicaule
click for enlargement
© 2009 Keir Morse
Lamium amplexicaule
click for enlargement
© 2002 George W. Hartwell
Lamium amplexicaule
click for enlargement
© 2005 George W. Hartwell

More photos of Lamium amplexicaule in CalPhotos

Geographic subdivisions for Lamium amplexicaule:
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
View all CCH records

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.