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

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



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.


I. balfourii Hook. f.

Annual, 1.5–10 dm
Leaf: blade 2.5–4 cm, lanceolate to widely ovate, generally acuminate, sparsely short-hairy
Inflorescence 4–8-flowered, axillary and terminal
Flower: lower sepal, including spur, 16–22 mm, lateral sepals 2–5 mm
Ecology: Wet sites, streambanks
Elevation: < 1000 m.
Bioregional distribution: North Coast, n Central Coast, s San Francisco Bay Area, ne South Coast
Distribution outside California: native to Himalaya Mtns

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bioregional map for IMPATIENS%20balfourii 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 Impatiens balfourii
Retrieve dichotomous key for Impatiens
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