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Arabidopsis thaliana

(Mouse-Ear Cress)

Overview

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Interesting Facts

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Common Names

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Common Names in English:

Mouse-Ear Cress, Mouseear Cress, Thale Cress, Thale-Cress, Wall-Cress

Description

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Genus Arabidopsis

Herbs annual , biennial, or perennial with stolons or woody caudex . Trichomes simple , mixed with stalked , 1-3-forked ones. Stems erect or decumbent , often several from base , usually glabrous above. Basal leaves rosulate, entire, toothed , or pinnately lobed . Cauline leaves petiolate or subsessile , entire, dentate , or rarely lyrate. Racemes few to several flowered, ebracteate . Fruiting pedicels ascending or divaricate or slightly reflexed . Sepals oblong , erect or ascending, glabrous or pubescent , base of lateral pair subsaccate or not. Petals white, pink, or purple; blade obovate , spatulate , or oblanceolate , apex obtuse or emarginate ; claw distinct or not. Stamens 6, erect, slightly tetradynamous ; filaments not dilated basally; anthers oblong, obtuse. Nectar glands confluent , subtending bases of filaments. Ovules 15-80 per ovary. Fruit dehiscent siliques, linear or cylindric , terete or flattened and latiseptate , shortly stipitate or subsessile; valves papery , veinless or midvein distinct, glabrous, smooth or somewhat torulose ; replum rounded ; septum complete ; style obsolete or to 1 mm; stigma capitate, entire. Seeds numerous , uniseriate , wingless or margined , oblong or ellipsoid , plump or flattened; seed coat minutely reticulate , mucilaginous or not when wetted; cotyledons accumbent or rarely incumbent .

Nine species: E and N Asia, Europe, North America; three species in China.[1]

Physical Description

Species Arabidopsis thaliana

Herbs annual , (2-) 5-30(-50) cm tall. Stems erect , 1 or few from base , simple or branched above, basally with predominantly simple trichomes , apically glabrous . Basal leaves shortly petiolate ; leaf blade obovate , spatulate , ovate , or elliptic , 0.8-3.5(-4.5) cm × (1-) 2-10(-15) mm, adaxially with predominantly simple and stalked 1-forked trichomes, margin entire, repand , or dentate , apex obtuse . Cauline leaves subsessile , usually few; blade lanceolate, linear , oblong , or elliptic, (0.4-) 0.6-1.8(-2.5) cm × 1-6(-10) mm, entire or rarely few toothed . Fruiting pedicels slender, divaricate , straight, 3-10(-15) mm. Sepals 1-2(-2.5) mm, glabrous or distally sparsely pubescent with simple trichomes, lateral pair not saccate . Petals white, spatulate, 2-3.5 × 0.5-1.5 mm, base attenuate to a short claw . Filaments white, 1.5-2 mm. Ovules 40-70 per ovary. Siliques linear, terete , smooth , (0.8-) 1-1.5(-1.8) cm × 0.5-0.8 mm; valves with a distinct midvein ; style to 0.5 mm. Seeds ellipsoid , plump, light brown, 0.3-0.5 mm; cotyledons incumbent . Fl. and fr. Jan-Jun(-Oct). 2n = 10*. [source]

Habit: Forb/herb

Flowers: Flower Color: yellow

Habitat

Plains , mountain slopes , river banks, roadsides; near sea level to 2000 m. [2].

Typically found at an altitude of 0 to 4,701 meters (0 to 15,423 feet).[3]

Biology

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Reproduction

Duration: Annual

Taxonomy

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Synonyms

Arabis thaliana Linnaeus • Crucifera Thaliana • Crucifera thaliana (L.) E. H. L. Krause • Hesperis Thaliana • Hesperis thaliana (L.) Kuntze • Sisymbrium thalianum (L.) Gaudin • Sisymbrium thalianum (L.) J. Gay & Monn. • Sisymbrium thalianum (L.) J. Gay Ex Monnard • Sisymbrium thalianum (Linnaeus) J. Gay & Monnard • Stenophragma thalianum (Linnaeus) Celakovsky.

Notes

Name Status: Accepted Name .

Last scrutiny: 2009

Similar Species

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Members of the genus Arabidopsis

ZipcodeZoo has pages for 2 species, subspecies, varieties, forms, and cultivars in this genus:

A. salsuginea (Saltwater Cress) · A. thaliana (Mouse-Ear Cress)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal November 12, 2007:

Identifiers

Footnotes

  1. Tai-yien Cheo, Lianli Lu, Guang Yang, Ihsan Al-Shehbaz & Vladimir Dorofeev "Arabidopsis". in Flora of China Vol. 8 Page 120. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  2. "Arabidopsis thaliana". in Flora of China Vol. 8 Page 120. Missouri Botanical Garden Press. Online at EFloras.org. [back]
  3. Mean = 503.500 meters (1,651.903 feet), Standard Deviation = 801.100 based on 16,169 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
Last Revised: 7/15/2012