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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

ACANTHOMINTHA THORNMINT

John M. Miller & James D. Jokerst

Annual, hairy or not, aromatic. Stem: erect, branched or not. Leaf: petioled; blade lanceolate to obovate, entire to spiny. Inflorescence: clusters, head-like, terminal and generally axillary; bracts generally scarious, veins conspicuous, margins spiny. Flower: calyx 2-lipped, lobes spine-tipped, upper 3 acuminate, lower 2 oblong; corolla funnel-shaped, 2-lipped, white, occasionally tinged lavender or rose, throat cream, upper lip 2-lobed to entire, hooded, lower lip 3-lobed, reflexed; stamens 4, upper 2 reduced, sterile or not; style slender, lower lobe longer. Fruit: smooth, ovoid.
4 species: southern California Floristic Province. (Greek: thorn mint) [Wagstaff et al. 1998 Plant Syst Evol 209:265–274]
Unabridged references: [Jokerst 1991 Madroño 38:278–286]

Key to Acanthomintha

A. duttonii (Abrams) Jokerst SAN MATEO THORNMINT
NATIVE
Stem: generally unbranched, < 20 cm; hairs 0 to short. Leaf: blade 8–12 mm, lance-oblong to obovate, margin of distal leaves not spiny, occasionally serrate. Inflorescence: generally terminal; bracts 5–11 mm, ovate, green at flower, marginal spines 5, 7, or 9, 3–7 mm. Flower: calyx 5–8 mm, hairs 0 or sparse, short; corolla 12–16 mm, white, occasionally ± lavender, upper lip < lower, entire, shallowly hooded; upper stamens fertile, anthers short-hairy, pink-red, pollen cream; style glabrous.
Serpentine grassland; < 300 m. Central Coast, San Francisco Bay Area (San Mateo Co.). Apr–Jun [Online Interchange] {CNPS list}
Unabridged synonyms: [Acanthomintha obovata Jeps. subsp. duttonii Abrams]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Apr 19 2014
Citation for this treatment: [Author of taxon treatment] 2012. Acanthomintha, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=11724, accessed on Apr 19 2014

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click for enlargement Acanthomintha duttonii
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Jo-Ann Ordano © 2005 California Academy of Sciences

Bioregions in which Acanthomintha duttonii occurs 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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CCH collections by month

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