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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Annual or perennial herb, generally fleshy
Stems generally glabrous
Leaves simple, alternate or opposite, sometimes stipuled
Inflorescence various
Flower bisexual, radial; sepals generally 2(–8), free or fused at base; petals 3–18, free or ± fused; stamens 1–many, free or inserted on corolla; ovary superior or partly inferior, chamber 1, placenta free-central or basal; styles 2–8, generally fused at base
Fruit: capsule, circumscissile or 2–3-valved
Seeds 1–many, generally black, generally shiny
Genera in family: ± 20 genera, ± 400 species: generally temp Am, Australia, s Africa; some cultivated (Lewisia, Portulaca, Calandrinia )
Reference: [Bogle 1969 J Arnold Arbor 50:566–598]
Family description and key to genera by Dieter H. Wilken & Walter A. Kelley.


Kenton L. Chambers

Annual or perennial herb, glabrous, ± fleshy, sometimes ± aquatic, sometimes matted
Leaves: cauline > 2, alternate or opposite, entire
Inflorescence: raceme, 1-sided; lowest flower generally bracted; pedicels recurved, erect in fruit
Flower: petals (3–)5, equal or 2 larger; stamens (3–)5, filaments fused to corolla-base; ovary chamber 1, placentas basal, style 1, stigmas 3
Fruit: capsule; valves 3, margins rolling inward and forcibly expelling seeds
Seeds 1–3, generally black, smooth to tubercled, fleshy-appendaged or not
Species in genus: 12 species: Am, Siberia, Australia
Etymology: (Giuseppe Monti, Italian botanist, 1682–1760)
Reference: [McNeill 1975 Can J Bot 53:789–809]
Sometimes divided into 9 genera.


M. dichotoma (Nutt.) Howell

Annual 2–9 cm, erect, often appearing tufted
Leaves alternate, 5–40 mm, linear
Inflorescences few–many, terminal; flowers 4–16
Flower often cleistogamous; sepals 1.5–2.5 mm, widely obovate, obtuse to truncate; petals = or slightly > sepals, ± unequal, white; stamens 3
Fruit 1.4–1.8 mm
Seed 0.8–1.2 mm, ± smooth; appendage 0
Chromosomes: 2n=14
Ecology: Uncommon. Moist depressions, grassland, open woodland
Elevation: 1000–1600 m.
Bioregional distribution: Klamath Ranges, Cascade Range, Modoc Plateau
Distribution outside California: to British Columbia, Montana

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bioregional map for MONTIA%20dichotoma 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 Montia dichotoma
Retrieve dichotomous key for Montia
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
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