Jepson Flora Project: Jepson Interchange    

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


Stems spreading to erect, branched throughout, densely strigose, generally grayish
Leaves short-petioled to subsessile; blades generally narrow, entire
Inflorescences axillary, generally subtended by leaves
Flower: calyx ± radial, 15-veined, lobes subequal; corolla 2-lipped, lips ± equal, upper lip ± flat, lower lip 3-lobed, central lobe notched; stamens 2, ± exserted, staminodes short; style unequally lobed
Species in genus: 4 species: sw US, n Mex
Etymology: (Greek: hoary white mint)


P. incana (Torr.) A. Gray

Plant 5–10 dm, rounded or mound-like
Leaf subsessile, generally reduced upward; blade 5–18 mm, 2–4 mm wide, oblong-elliptic to narrowly linear
Inflorescence: flowers 2–6; pedicel 1–2 mm
Flower: calyx densely short-hairy, tube 3–5 mm, puberulent within, lobes 1–2 mm; corolla 8–10 mm, light blue to lavender, upper lip 2–3.5 mm, lower 3–4 mm, minutely purple-dotted
Ecology: Uncommon. Sandy soils, rocky slopes,
Elevation: 1600–1700 m.
Bioregional distribution: s Mojave Desert (Cushenbury Springs)
Distribution outside California: to Colorado, Texas, n Mexico
Flowering time: Jun–Jul
Horticultural information: TRY; DFCLT.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for POLIOMINTHA%20incana 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 Poliomintha incana
Retrieve dichotomous key for Poliomintha
Overlay Consortium of California Herbaria specimen data by county on this map
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