Jepson eFlora: Taxon page
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Gunnera tinctoria
CHILEAN-RHUBARB

Higher Taxonomy
Family: GunneraceaeView Description 

Common Name: GUNNERA FAMILY
Habit: Perennial herb, often large, terrestrial [semi-aquatic]; rhizome often with large scales. Stem: +- 0. Leaf: simple, generally alternate, often large; stipules 0; blades < to > petioles, +- round to reniform or ovate, generally toothed or lobed. Inflorescence: panicle (generally spikes along 1° axis), terminal or from upper axils, large; flowers many, often pistillate below, staminate above, bisexual between. Flower: very small, unisexual or bisexual; sepals generally 2 [+- 0]; petals 2 [0]; stamens 1--2; ovary inferior, chamber 1, styles 2. Fruit: drupe.
Genera In Family: 1 genus, +- 35 species: Mexico, southern hemisphere, Hawaii; several cultivated. Rhizome scales previously interpreted as stipules.
eFlora Treatment Author: Livia Wanntorp & Elizabeth McClintock
Scientific Editor: Thomas J. Rosatti.
Genus: GunneraView Description 


Etymology: (J.E. Gunner, Norwegian bishop, botanist, 1718--1773) Note: Plants obtain fixed nitrogen from cyanobacteria (Nostoc) living just under surface of rhizomes, roots, in the only such symbiosis in angiosperms.

Gunnera tinctoria (Molina) Mirb.
NATURALIZED
Habit: Rhizome scales 10--20 cm, deeply cut. Leaf: covered with stiff, hard prickles; petiole 1--1.5 m; blade 1--2 m, +- round, +- concave abaxially, thick, rough, main lobes palmate, teeth irregular, veins prominent, especially abaxially. Inflorescence: arising +- from ground, 50--75[100] cm, < 10 cm wide, +- conic; spikes many, dense, 2--5 cm, stout; peduncle generally 2--20 cm. Flower: style < 1.2 mm, >= sepals. Fruit: many, 1--2 mm, +- red, ovate to oblong.
Ecology: Uncommon. Disturbed, shaded, damp areas; Elevation: < 100 m. Bioregional Distribution: CCo (Marin, San Francisco cos.); Distribution Outside California: native to Chile. Flowering Time: Jul--Oct Note: May spread aggressively by seeds, rhizomes.
Synonyms: Gunnera chilensis Lam.
eFlora Treatment Author: Livia Wanntorp & Elizabeth McClintock
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Citation for this treatment: Livia Wanntorp & Elizabeth McClintock 2016. Gunnera tinctoria, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=27405, accessed on August 23, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on August 23, 2016.


Geographic subdivisions for Gunnera tinctoria:
CCo (Marin, San Francisco cos.);
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.