Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



Dieter H. Wilken, except as specifed

Annual, perennial herb, shrub, glabrous to hairy, generally aromatic
Stems generally erect, generally 4-angled
Leaves generally simple to deeply lobed, opposite, generally gland-dotted
Inflorescence: cyme, generally clustered around stem, head-like, separated by evident internodes (terminal in Monardella ) or collectively crowded, spike-like to panicle-like (sometimes raceme or flowers 2–12); 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, sometimes 0, lower lip generally 3-lobed; stamens generally 4, generally exserted, paired, pairs unequal, sometimes 2, staminodes 2 or 0; ovary superior, generally 4-lobed to base, chambers 2, ovules 2 per chamber, style 1, arising from center at junction of lobes, stigmas generally 2
Fruit: nutlets 4, generally ovoid to oblong, smooth
Genera in family: ± 200 genera, 5500 species: worldwide. Many cultivated for herbs, oils (Lavandula , lavender; Mentha , mint; Ocimum , basil; Rosmarinus , rosemary; Thymus , thyme), some cultivated as ornamental (in CA Cedronella , Leonotis , Phlomis )
Reference: [Cantino & Sanders 1986 Syst Bot 11:163–185]



James D. Jokerst

Annual, hairy or not, aromatic
Stem erect, branched or not
Leaf lanceolate to obovate, entire to spiny, petioled
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, sometimes tinged lavender or rose, throat cream, upper lip 2-lobed or entire, hooded, lower lip 3-lobed, reflexed; stamens 4, upper 2 reduced, sterile or not; style slender, lower lobe longer
Fruit smooth, ovoid
Species in genus: 4 species: s CA-FP
Etymology: (Greek: thorn mint)


A. obovata Jeps.

Stem 4–25 cm, generally branched below; hairs 0 to sparse, short or long, some inconspicuously glandular
Leaf: blades 8–12 mm, ovate or obovate; margins of lower entire or serrate, of those in inflorescence spiny
Inflorescence: bracts 7–15 mm, shiny, straw-colored at flower, marginal spines 7, 9, or 11, 5–8 mm
Flower: calyx 7–13 mm, hairs short or long, sometimes glandular; corolla 12–27 mm, white, lobes purple-tipped, upper lip < lower, entire, shallowly hooded; upper stamens fertile, anthers long-hairy, cream, pollen cream
Chromosomes: n=19
Ecology: Grassy slopes, oak woodland, chaparral
Elevation: < 1500 m.
Bioregional distribution: South Coast Ranges, w&c Western Transverse Ranges.Like A. duttonii.


subsp. cordata Jokerst

Stem: hairs 0 or short
Inflorescence: bracts round or wider than long, cordate-clasping at base
Flower: calyx hairs 0 or short; anthers densely woolly
Ecology: Habitats and elevations of sp
Bioregional distribution: Outer South Coast Ranges, w&c Western Transverse Ranges (San Luis Obispo to Ventura cos.).
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for ACANTHOMINTHA%20obovata%20subsp.%20cordata being generated

Retrieve Jepson Interchange Index to Plant Names entry for Acanthomintha obovata subsp. cordata
Retrieve dichotomous key for Acanthomintha
Overlay Consortium of California Herbaria specimen data by county on this map
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