Jepson eFlora: Taxon page
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Asarum caudatum

Higher Taxonomy
Family: AristolochiaceaeView DescriptionDichotomous Key

Habit: Perennial herb, woody vine, [shrub], rhizomed, aromatic. Stem: branched, occasionally +- underground. Leaf: simple, basal, cauline, or arising from rhizome, alternate; blade generally cordate, entire. Inflorescence: flower generally 1, axillary or terminal. Flower: bisexual, radial or bilateral; sepals 3, free or fused; petals generally 0; stamens generally 6 or 12, free or fused to style; pistil generally 1, ovary +- or partly inferior, chambers generally 6. Fruit: generally capsule. Seed: many.
Genera In Family: 5--8 genera, +- 500 species: mainly tropics, warm temperate; some cultivated (Aristolochia, Asarum, Saruma).
eFlora Treatment Author: Michael R. Mesler & Karen Lu
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: AsarumView DescriptionDichotomous Key

Common Name: WILD-GINGER
Habit: Rhizome shallowly horizontal or deeply +- vertical, plants spreading or clumped; roots gingery-aromatic. Leaf: from rhizome, generally evergreen; blade cordate to reniform. Inflorescence: flower terminal, at ground level. Flower: generally dark colored; sepals forming tube, persistent; stamens 12, free from style, tips generally appendaged. Fruit: fleshy capsule. Seed: with fleshy appendage, ant-dispersed.
Species In Genus: 90 species: northern temperate. Etymology: (Greek: derivation unknown)

Asarum caudatum Lindl.
Habit: Plants generally spreading, forming loose mat; rhizomes near soil surface, horizontal. Leaf: blade all green. Inflorescence: peduncle +- horizontal. Flower: calyx lobes 2--9 cm, spreading in flower, long-tapered, maroon (rarely +- green), tube white inside with 1 median red stripe; stamen tip < pollen sacs, dark. Chromosomes: 2n=26.
Ecology: Moist places in forest; Elevation: < 2200 m. Bioregional Distribution: NW, CaRH, CCo, SnFrB; Distribution Outside California: to British Columbia, Montana. Flowering Time: Mar--Aug Note: Plants with short, reflexed, tapered calyx lobes from CaRH (McCloud River) resemble Asarum lemmonii but have horizontal inflorescence and longer calyx lobe taper.
eFlora Treatment Author: Michael R. Mesler & Karen Lu
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botanical illustration including Asarum caudatum


Citation for this treatment: Michael R. Mesler & Karen Lu 2016. Asarum caudatum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 05, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 05, 2016.

Asarum caudatum
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© 2012 Neal Kramer
Asarum caudatum
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© 2009 California Academy of Sciences
Asarum caudatum
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© 2010 Julie Kierstead Nelson
Asarum caudatum
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© 2008 Keir Morse
Asarum caudatum
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© 2008 Keir Morse
Asarum caudatum
click for enlargement
© 2007 California Academy of Sciences

More photos of Asarum caudatum in CalPhotos

Geographic subdivisions for Asarum caudatum:
NW, CaRH, CCo, SnFrB;
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).

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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.