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Monolepis nuttalliana

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, except as noted
Scientific Editor: Bruce G. Baldwin, David J. Keil, Thomas J. Rosatti.
Genus: MonolepisView DescriptionDichotomous Key

Habit: Annual, generally glabrous, generally powdery when young. Stem: prostrate to ascending, simple or branched from base, not branched distally, ultimate branches not thread-like. Leaf: generally reduced distally on stem, +- lanceolate to oblanceolate or spoon-shaped, entire or not, tip obtuse to rounded. Inflorescence: clusters generally axillary, 4--15-flowered; bracts leaf-like. Flower: bisexual or pistillate; sepals (0)1--3, +- green; stamens 0--1(2); stigmas 2, fused at base. Fruit: +- flattened; wall pitted to tubercled, free from seed or not. Seed: generally vertical, lenticular, smooth, brown to black.
Species In Genus: 5 species: temperate western North America, South America, central and northeastern Asia. Etymology: (Greek: 1 scale, from sepal number in most species) Note: Monolepis pusilla moved to Micromonolepis.
eFlora Treatment Author: Bruce G. Baldwin, adapted from Holmgren (2003)
Reference: Holmgren 2003 FNANM 4:300--301

Monolepis nuttalliana (Schult.) Greene
Habit: Plant 5--50 cm, powdery, glabrous in age. Stem: prostrate to ascending. Leaf: 10--30(40) mm, +- lanceolate, fleshy, proximal with >= 2 teeth near base, hastate or not, distal +- entire. Inflorescence: flowers 5--15+ per cluster. Flower: sepal 1, 1 mm, oblanceolate to obovate, membranous; stamen 1. Fruit: 1.1--1.5 mm; wall minutely pitted, adherent to seed. Chromosomes: n=9.
Ecology: Generally moist, +- alkaline clay soils in disturbed areas; Elevation: < 3700 m. Bioregional Distribution: CA (exc NW); Distribution Outside California: to Alaska, central North America, northern Mexico. Flowering Time: Apr--Sep
eFlora Treatment Author: Bruce G. Baldwin, adapted from Holmgren (2003)
Reference: Holmgren 2003 FNANM 4:300--301
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botanical illustration including Monolepis nuttalliana


Citation for this treatment: Bruce G. Baldwin, adapted from Holmgren (2003) 2012, Monolepis nuttalliana, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on July 17, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on July 17, 2018.

Monolepis nuttalliana
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© 2005 James M. Andre
Monolepis nuttalliana
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© 2017 Neal Kramer
Monolepis nuttalliana
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© 2012 Neal Kramer
Monolepis nuttalliana
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© 2006 Steve Matson
Monolepis nuttalliana
click for enlargement
© 2012 Neal Kramer
Monolepis nuttalliana
click for enlargement
© 2015 Steve Matson

More photos of Monolepis nuttalliana in CalPhotos

Geographic subdivisions for Monolepis nuttalliana:
CA (exc NW);
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.
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, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.