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Chenopodium simplex
LARGE-SEEDED GOOSEFOOT

Higher Taxonomy
Family: ChenopodiaceaeView DescriptionDichotomous Key

Common Name: GOOSEFOOT FAMILY
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: ChenopodiumView DescriptionDichotomous Key

Common Name: PIGWEED, GOOSEFOOT
Habit: Annual or perennial herb, glabrous or powdery. Stem: branches 0 to generally erect (spreading). Leaf: generally petioled; blade linear to deltate or diamond-shaped, entire to lobed or toothed, reduced distally on stem; proximal leaves generally early-deciduous. Inflorescence: spheric clusters or flower 1, in spikes, or panicle-like, generally dense; bracts generally 0; flowers generally sessile. Flower: sepals generally 5, fused or not, persistent, flat to keeled; stamens generally 5; stigmas 2(5). Fruit: enclosed or subtended by calyx; fruit wall membranous or papery, free or attached to seed and generally loosening in age. Seed: vertical or horizontal, lenticular to +- spheric, red-brown to black; wall thin.
Species In Genus: +- 100 species: temperate; some cultivated for food or grain. Etymology: (Greek: goose foot, from leaf shape of some species) Note: Fruit generally required for identification. Other species in TJM (1993) now treated in Dysphania.
Unabridged Note: Powder on plants from small, inflated hairs.
eFlora Treatment Author: Steven E. Clemants & Nuri Benet-Pierce

Chenopodium simplex (Torr.) Raf.
NATIVE
Habit: Annual 35--150 cm, generally few-branched distally. Leaf: blade 25--150 mm, 10--80 mm wide, broadly ovate to deltate, wavy-lobed, dark green, lobes 3--5(7), glabrous to sparsely powdery, base truncate to +- cordate, tip long-tapered to acute or occasionally acuminate. Inflorescence: flowers 1 or in cymes, in terminal and axillary panicles. Flower: sepals not enclosing fruit, calyx lobes ovate to lanceolate, +- keeled abaxially, glabrous to sparsely powdery, tip acute to obtuse. Fruit: 1.5--3 mm diam, wall weakly attached to seed, smooth, netted. Seed: horizontal, 1--1.5 mm diam, lenticular, margin broadly ridged; seed coat netted, radially grooved, shiny. Chromosomes: 2n=18.
Ecology: Disturbed or open places, scrub, conifer forest; Elevation: 1400--2400 m. Bioregional Distribution: n SN, MP, W&I; Distribution Outside California: to eastern United States. Flowering Time: Jul--Oct
Synonyms: Chenopodium gigantospermum Aellen
eFlora Treatment Author: Steven E. Clemants & Nuri Benet-Pierce
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

Previous taxon: Chenopodium rubrum var. rubrum
Next taxon: Chenopodium strictum var. glaucophyllum

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botanical illustration including Chenopodium simplex

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Citation for this treatment: Steven E. Clemants & Nuri Benet-Pierce 2016. Chenopodium simplex, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=19204, accessed on December 09, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on December 09, 2016.


Chenopodium simplex
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© 2016 Keir Morse
Chenopodium simplex
click for enlargement
© 2016 Keir Morse
Chenopodium simplex
click for enlargement
© 2016 Keir Morse
Chenopodium simplex
click for enlargement
© 2016 Keir Morse
Chenopodium simplex
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© 2005 Larry Blakely
Chenopodium simplex
click for enlargement
© 2016 Keir Morse

More photos of Chenopodium simplex in CalPhotos


Geographic subdivisions for Chenopodium simplex:
n SN, MP, W&I;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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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).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

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