Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
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  • 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]



Species in genus: 1 sp
Etymology: (Don Jose Salazar y Larrequi, Mexican astronomer, US-Mexican Boundary Survey)


S. mexicana Torr.

Shrub, 5–10(15) dm, ± rounded, branched
Stem: lateral branches spreading, rigid, tips becoming spine-like; twigs ± canescent
Leaf short-petioled to subsessile; blade 3–15(20) mm, 2–8 mm wide, generally ovate to elliptic, base rounded, margin entire, glabrous to puberulent
Inflorescences axillary at distal 3–10 nodes; flowers 2; axis finely glandular-puberulent; bracts 0
Flower 2-lipped; calyx lobes ± equal, entire, purplish, becoming 1–2 cm, bladder-like in fruit; corolla 15–25 mm, upper lip ± entire, white to light violet, lower lip ± 3 lobed, violet to purple; stamens 4, generally enclosed by upper lip, lower stamen pair < upper pair, anthers ciliate
Fruit: nutlets, widely ovoid, short-stalked, tubercled
Ecology: Sandy to gravelly slopes, washes, scrub, woodland
Elevation: < 1800 m.
Bioregional distribution: s East of Sierra Nevada, Desert
Distribution outside California: to Utah, Texas, n Mexico
Flowering time: Mar–Jun
Horticultural information: DRN, IRR: 7, 8, 9, 10, 11, 12, 13, 14, 18, 19, 20, 21 &SUN: 15, 16, 22, 23.

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