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LAMIACEAE (Labiatae) MINT FAMILY

Dieter H. Wilken & Margriet Wetherwax, family description, key to genera

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.
± 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). [Harley et al. 2004 Fam Generally Vasc Plant 7:167–275] 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. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.

Key to Lamiaceae

LAMIUM DEAD NETTLE

John M. Miller & Dieter H. Wilken

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.
40 species: temperate Eurasia, northern Africa. (Latin: ancient name) [Wagstaff et al. 1998 Plant Syst Evol 209:265–274]
Unabridged references: [Bernström 1955 Hereditas 41:1–122]

Key to Lamium

L. amplexicaule L. HENBIT
NATURALIZED
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.
2n=18. Disturbed sites, cultivated or abandoned fields; < 800 m. California Floristic Province; widespread North America; native to Eurasia. Cleistogamous flower corollas < 8 mm, generally not opening. Apr–Sep [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 2 2014
Citation for this treatment: [Author of taxon treatment] 2013. Lamium, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=30151, accessed on Sep 2 2014

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click for enlargement Lamium amplexicaule
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2003 Michael Charters

Geographic subdivisions indicated for the distribution of 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.
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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).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

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