Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit 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]



Harlan Lewis

Annual, shrub, strong-scented
Stem hairy, often glandular
Leaf simple; blade linear to ovate, entire
Inflorescence: cymes (racemes in T. lanceolatum), axillary
Flower: calyx lobes 5, equal or uppermost 1 narrower; corolla blue or lavender, tube straight or curved upward, sometimes abruptly 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)
Reference: [Lewis 1945 Brittonia 5:276–303]
Annual species generally flowering late summer or fall.


T. austromontanum F.H. Lewis

Annual < 5 dm
Stem: short hairs appressed, long hairs spreading, some hairs glandular
Leaf: petiole indistinct or < 5 mm; blade 2–5 cm, elliptic, length > 4 X width
Flower: calyx lobes > 2 X tube, widest at base, acute, ± equal; corolla tube 1.5–3 mm, curved gradually upward, ± = calyx, lower lip 1.8–3 mm; stamens 3–5.5 mm, exserted, arched
Ecology: Uncommon. Drying margins of lakes, meadows, streams
Elevation: 1000–2500 m.
Bioregional distribution: Tehachapi Mountain Area, Transverse Ranges, Peninsular Ranges, East of Sierra Nevada
Distribution outside California: Baja California


subsp. compactum F.H. Lewis


Stem < 10 cm
Leaf < 30 mm, >> internode above
Chromosomes: n=14
Ecology: Montane vernal pools
Elevation: 2500 m.
Bioregional distribution: San Jacinto Mountains (Hidden Lake).
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for TRICHOSTEMA%20austromontanum%20subsp.%20compactum being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

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