Jepson eFlora: Taxon page
Key to families | Table of families and genera
Previous taxon Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Next taxon
Atriplex prostrata

Higher Taxonomy
Family: ChenopodiaceaeView DescriptionDichotomous Key

Habit: Annual to shrub; hairs simple, stellate, or glandular; plants in several genera scaly, mealy, or powdery from collapsed glands; monoecious, dioecious, with bisexual flowers, or with both bisexual and unisexual flowers. Stem: occasionally fleshy. Leaf: blade simple, generally alternate, occasionally fleshy or reduced to scales, veins pinnate; stipules 0. Inflorescence: raceme, spike, catkin-like, spheric head, axillary clusters of flowers, or flowers 1; bracts 0--5, herbaceous, generally persistent or strongly modified in fruit, wings, tubercles or spines present or 0. Flower: bisexual or unisexual, small, generally green; calyx parts (1)3--5, or 0 in pistillate flowers, free or fused basally (or +- throughout), leaf-like in texture, membranous, or fleshy, deciduous or not, often strongly modified in fruit; corolla 0; stamens 1--5, opposite sepals, filaments free, equal; anthers 4-chambered; ovary superior (1/2-inferior), chamber 1; ovule 1; styles, stigmas 1--4 (or stigmas sessile). Fruit: achene or utricle, generally falling with persistent calyx or bracts. Seed: 1, small, lenticular to spheric; seed coat smooth to finely dotted, warty, net-like, or prickly, margin occasionally winged.
Genera In Family: 100 genera, 1500 species: worldwide, especially deserts, saline or alkaline soils; some cultivated for food (Beta vulgaris subsp. vulgaris, beet, Swiss chard; Spinacia oleracea L., spinach; Chenopodium quinoa Willd., quinoa); and some worldwide, naturalized ruderal or noxious agricultural weeds. Note: Nitrophila treated in Amaranthaceae, Sarcobatus treated in Sarcobataceae. Key to genera revised by Elizabeth H. Zacharias to incorporate Extriplex and Stutzia, 2 genera segregated from Atriplex.
eFlora Treatment Author: Mihai Costea, family description, key to genera, revised by Thomas J. Rosatti & Elizabeth H. Zacharias
Scientific Editor: Bruce G. Baldwin, David J. Keil, Thomas J. Rosatti.
Genus: AtriplexView DescriptionDichotomous Key

Habit: Generally monoecious annual, to generally dioecious shrub, generally scaly. Leaf: generally alternate, distal +- reduced; blade entire to variously dentate; anatomy Kranz or non-Kranz (see note). Inflorescence: axillary or terminal. Staminate Inflorescence: spheric cluster to spike-like or panicle; bracts 0. Pistillate Inflorescence: cluster to spike- or panicle-like, occasionally 1; bracts 2 per fruit, enlarged in age, free to variously fused, generally compressed, generally sessile, falling with fruit (or not). Staminate Flower: calyx lobes 3--5; stamens 3--5. Pistillate Flower: calyx generally +- 0; stigmas 2. Seed: generally erect.
Species In Genus: +- 250 species: temperate to subtropics worldwide. Etymology: (Latin: name derived from Greek) Note: Generally in alkaline or saline soils; some weedy; some accumulate selenium. Bract descriptions refer to 2 bracts surrounding flower, enlarging in fruit. Australian Atriplex crassipes J.M. Black possibly in SCo. In this revised taxonomy, Atriplex californica, Atriplex joaquinana moved to Extriplex, Atriplex covillei to Stutzia, both new genera [Zacharias & Baldwin 2010 Syst Bot 35(4):839--857]. Kranz anatomy (observable at 10 ×, sometimes only after scraping off scaly, mealy, or powdery layer) characterized by veins that are darker green than rest of leaf, due to higher concentrations of chloroplasts in bundle-sheath cells surrounding veins.
eFlora Treatment Author: Elizabeth H. Zacharias

Atriplex prostrata DC.
Habit: Annual 1--12 dm. Stem: branched at base, ascending to +- erect, green-striate, finely white-scaly, glabrous in age. Leaf: generally petioled, blade 10--90 mm, triangular-hastate, entire to wavy-dentate, green, glabrous to sparsely fine-scaly, base truncate to rounded; non-Kranz. Pistillate Inflorescence: bracts in fruit 3--7 mm, fused at base, ovate to deltate, base truncate to obtuse, entire to finely-dentate, smooth or 2-tubercled. Seed: of 2 kinds, 1--1.5 mm, black, or 1--2.5 mm, brown. Chromosomes: 2n=18.
Ecology: Wet places, marshes; Elevation: < 1300 m. Bioregional Distribution: NCo, NCoRO, CaRH, n SNF, Teh, GV, CW, SW, MP (exc Wrn), SNE (exc W&I); Distribution Outside California: to eastern North America; native to Eurasia. Flowering Time: Apr--Oct
Unabridged Note: Expanded author citation: Atriplex prostrata Boucher ex DC.
eFlora Treatment Author: Elizabeth H. Zacharias
Jepson Online Interchange

Previous taxon: Atriplex polycarpa
Next taxon: Atriplex pusilla

Name Search
botanical illustration including Atriplex prostrata


Citation for this treatment: Elizabeth H. Zacharias 2016. Atriplex prostrata, Revision 1, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on February 08, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on February 08, 2016.

Atriplex prostrata
click for enlargement
© 2015 Keir Morse
Atriplex prostrata
click for enlargement
© 2015 Keir Morse
Atriplex prostrata
click for enlargement
© 2015 Keir Morse
Atriplex prostrata
click for enlargement
© 2013 Neal Kramer
Atriplex prostrata
click for enlargement
© 2003 George W. Hartwell
Atriplex prostrata
click for enlargement
© 2015 Keir Morse

More photos of Atriplex prostrata in CalPhotos

Geographic subdivisions for Atriplex prostrata:
NCo, NCoRO, CaRH, n SNF, Teh, GV, CW, SW, MP (exc Wrn), SNE (exc W&I);
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
View all CCH records

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.