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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BALSAMINACEAE

TOUCH-ME-NOT FAMILY

Dieter H. Wilken

Annual, perennial herb, generally glabrous
Stem watery to fleshy
Leaves simple, alternate, opposite, or whorled, petioled; blade generally toothed, veins pinnate; stipules generally ± 0
Inflorescence: cyme, umbel-like, terminal or axillary, 1–8 flowered
Flower bisexual, bilateral; sepals 3–5, free; petals 3 or 5, free or ± fused; stamens 5, filaments short, ± flat, anthers ± fused above stigma; ovary 1, superior, generally 5-chambered, stigmas 1–5, sessile
Fruit: capsule, explosive
Genera in family: 2–4 genera, ± 800 spp: tropical, warm temp; some ornamental
Reference: Wood 1975 J Arnold Arb 56:413–426

IMPATIENS

TOUCH-ME-NOT, JEWELWEED


Leaves alternate
Flower sepals 3, lateral 2 < lower (sometimes much reduced or 0), generally greenish, lower 1 pouched, generally spurred, colorful; petals 3, lower 2 notched to unequally 2-lobed, upper 1 generally < lower, entire, often keeled on back
Species in genus: 500–600 species: tropical, warm temp Am, Eurasia, Africa
Etymology: (Latin: impatient, from explosive fruit)
Petals also interpreted to be 5, lower 4 fused in 2 pairs.

Introduced

I. noli-tangere L.

Annual, 2–6 dm
Leaf: blade 3–12 cm, elliptic to ovate, acute, ± glabrous
Inflorescence generally 2-flowered, axillary
Flower: lower sepal, including spur, 10–25 mm, lateral sepals 4–6 mm
Ecology: Disturbed, moist, often shaded sites
Elevation: < 500 m.
Bioregional distribution: n North Coast
Distribution outside California: to Alaska, n Idaho, Eurasia
Synonyms: I. occidentalis Rydb
Probably introduced in CA as ornamental.

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