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Trichostema oblongum

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: TrichostemaView DescriptionDichotomous Key

Common Name: BLUE CURLS
Habit: Annual, shrub, strong-scented. Stem: hairy, generally glandular. Leaf: simple; blade linear to ovate, entire. Inflorescence: cyme (raceme), axillary. Flower: calyx lobes 5, equal or uppermost 1 narrower; corolla blue to lavender, tube straight or curved upward, occasionally sharply recurved near throat, included to much-exserted from calyx, lobes 5, lowest a generally reflexed lip; stamens 4, attached near throat, generally much-exserted, ascending between upper corolla lobes, generally arched. Fruit: nutlets 4, joined in basal +- 1/3, puberulent to hairy, irregularly ridged.
Species In Genus: +- 17 species: North America. Etymology: (Greek: hair, stamen) Note: Annual species generally flowering late summer, fall.
eFlora Treatment Author: Harlan Lewis

Trichostema oblongum Benth.
Habit: Annual < 5 dm. Stem: hairs short, appressed to spreading, or hairs, spreading, some glandular. Leaf: petiole indistinct or < 5 mm; blade 2--4 cm, widely elliptic, length generally < 4 × width. Flower: calyx lobes > 2 × tube, generally widest above base, +- acuminate, +- equal; corolla tube 2--3.5 mm, curved gradually upward, +- = calyx, lower lip 2--3.5 mm; stamens 3--6 mm, exserted, arched. Chromosomes: 2n=14.
Ecology: Dry margins of meadows, streambanks; Elevation: 100--3000 m. Bioregional Distribution: KR, NCoR, CaR, SN, MP; Distribution Outside California: to Washington, Idaho. Flowering Time: Jun--Sep
eFlora Treatment Author: Harlan Lewis
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botanical illustration including Trichostema oblongum


Citation for this treatment: Harlan Lewis 2016. Trichostema oblongum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 05, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 05, 2016.

Trichostema oblongum
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© 2010 Barry Breckling
Trichostema oblongum
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© 2000 John Game
Trichostema oblongum
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© 2012 Steve Matson
Trichostema oblongum
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© 2009 Barry Breckling
Trichostema oblongum
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© 2003 Christopher L. Christie
Trichostema oblongum
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© 2009 Barry Breckling

More photos of Trichostema oblongum in CalPhotos

Geographic subdivisions for Trichostema oblongum:
KR, NCoR, CaR, SN, MP;
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.
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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.