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Cardamine hirsuta L.
HAIRY BITTERCRESS
Hairy Wood Cress; Common Bitter Cress; Hairy Woodcress; Common Bittercress; Common Bitter-cress; Hairy Bitter-cress

Life   Plantae   Dicotyledoneae   Brassicaceae   Cardamine

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Cardamine hirsuta
© Copyright Bobby Hattaway 2011 · 5
Cardamine hirsuta
Cardamine hirsuta
© Copyright Bobby Hattaway 2011 · 5
Cardamine hirsuta

Cardamine hirsuta
© Copyright Bobby Hattaway 2011 · 5
Cardamine hirsuta
Cardamine hirsuta
© Copyright Bobby Hattaway 2011 · 5
Cardamine hirsuta

Cardamine hirsuta
© Copyright Bobby Hattaway 2011 · 5
Cardamine hirsuta
Cardamine hirsuta
© Copyright Bobby Hattaway 2011 · 5
Cardamine hirsuta

Cardamine hirsuta
© Copyright Bobby Hattaway 2011 · 5
Cardamine hirsuta
Cardamine hirsuta, ---.. ZS PMax
© Copyright source/photographer · 5
Cardamine hirsuta, ---.. ZS PMax

Cardamine hirsuta, ---.. ZS PMax
© Copyright source/photographer · 5
Cardamine hirsuta, ---.. ZS PMax
Cardamine hirsuta, ---.. ZS PMax
© Copyright source/photographer · 5
Cardamine hirsuta, ---.. ZS PMax

Cardamine hirsuta, whole plant - in flower - general view
© Copyright Steve Baskauf, 2002-2011 · 4
Cardamine hirsuta, whole plant - in flower - general view
Cardamine hirsuta, fruit - as borne on the plant
© Copyright Steve Baskauf, 2002-2011 · 4
Cardamine hirsuta, fruit - as borne on the plant

Cardamine hirsuta, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Cardamine hirsuta, inflorescence - whole - unspecified
Cardamine hirsuta, inflorescence - frontal view of flower
© Copyright Steve Baskauf, 2002-2011 · 4
Cardamine hirsuta, inflorescence - frontal view of flower
Identification
Cardamine hirsuta has a marginal fringe of hairs at the base of the leafstalks on stem leaves. Cardamine parviflora and Cardamine pensylvanica do not.

Names
Scientific source:

Supported by

Associates · map
FamilyScientific name @ source (records)
Albuginaceae  Albugo candida @ BPI (5)
Andrenidae  Andrena arabis @ UCMS_ENT (2)
Peronosporaceae  Peronospora parasitica @ BPI (2)

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Following modified from Delaware Wildflowers
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Delaware Wildflowers  •  Scientific names

Cardamine hirsuta L. Hairy Bittercress
Brassicaceae — Mustard family
Non-native
Cardamine hirsuta
The backyard
April 2001 Cardamine hirsuta
The backyard
March 2012 Cardamine hirsuta Cardamine hirsuta
The tiny hairs at the base of the leaf stalks are why it's called "hairy". The front yard
April 2013

Guide to Cardamine of Delaware

Search Google Delaware USDA

Copyright David G. Smith

Delaware Wildflowers main page

Following modified from MissouriPlants.com
   Top | See original


Cardamine hirsuta  L.

Hairy Bittercress

Cardamine hirsuta plant

Family - Brassicaceae

Stems - Glabrous, green or sometimes purplish in strong sun, to +40cm tall, terete, from a taproot, typically multiple from the base, erect, herbaceous, typically simple.

Leaves - No info. yet.

Cardamine hirsuta leaves

Cardamine hirsuta petiole Base of petiole.

Inflorescence - No info. yet.

Flowers - No info. yet.

Cardamine hirsuta flowers

Cardamine hirsuta calyx Calyx.

Cardamine hirsuta fruits Infructescence.

Flowering - March - April.

Habitat - Waste ground, disturbed sites, roadsides, lawns, fields, railroads.

Origin - Native to Europe.

Other info. - This introduced species can be found scattered in Missouri and the plant is becoming much more common.
Many members of the genus Cardamine can be hard to distinguish in the field. C. hirsuta can be identified by its many basal leaves, glabrous stems, and basal leaf petioles - which have hirsute hairs at the base. The basal leaves of this species dry and wilt as the plant matures so it is best identified while young.
C. hirsuta can flower when quite small. The picture below shows a tiny plant typical of how the species looks in an area that gets mowed or has poor soil.

Cardamine hirsuta plant

Photographs taken in Brown Summit, NC., 3-10-03.


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Following modified from Flora of North America
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Link to Flora of North America home
 
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FNA Vol. 7 Page 466, 475 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 7 | Brassicaceae | Cardamine

18. Cardamine hirsuta Linnaeus, Sp. Pl. 2: 655. 1753.

Annuals; sparsely hirsute basally (at least on petiole of basal leaves), often glabrous distally. Rhizomes absent. Stems erect, ascending, or decumbent, unbranched or branched basally and/or distally, (0.3-)1-3.5 (-4.5) dm, (not flexuous). Basal leaves (persistent to anthesis), rosulate, (5-)8-15(-22)-foliolate, (2-)3.5-15(-17) cm, leaflets petiolulate; petiole 0.5-5 cm, (ciliate); lateral leaflet blade oblong, ovate, obovate, or orbicular, smaller than terminal, margins entire, repand, crenate, or 3-lobed; terminal leaflet (petiolule 0.2-1 cm), blade reniform or orbicular, 0.4-2 cm × 6-30 mm, margins entire, repand, dentate, or 3 or 5-lobed. Cauline leaves 1-4(-6), compound as basal, petiolate, [(0.5-)1.2-5.5 (-7) cm, including petiole], leaflets petiolulate; blade base not auriculate; leaflets similar to basal. Racemes ebracteate. Fruiting pedicels erect to ascending, (2-) 3-10(-14) mm. Flowers: sepals oblong, 1.5-2.5 × 0.3-0.7 mm, lateral pair not saccate; petals (sometimes absent) white, spatulate, 2.5-4.5(-5) × 0.5-1.1 mm; (stamens usually 4, lateral pair often absent, rarely 5 or 6); filaments 1.8-3 mm; anthers ovate, 0.3-0.5 mm. Fruits linear, (torulose), (0.9-)1.5-2.5(-2.8) cm × (0.8-)1-1.4 mm, (often appressed to rachis); ovules 14-40 per ovary; style 0.1-0.6(-1) mm. Seeds light brown, oblong or subquadrate, 0.9-1.3(-1.5) × 0.6-0.9 (-1.1) mm, (narrowly margined). 2 n = 16.

Flowering Feb-Jul. Roadsides, clearings, disturbed sites, slopes, cedar glades, mixed woods, meadows, fields, waste grounds, damp places, grassy areas; 0-700 m; introduced; B.C., Ont.; Ala., Ark., Calif., Conn., Del., D.C., Fla., Ga., Ill., Ky., La., Md., Mass., Mich., Miss., Mo., N.J., N.Y., N.C., Ohio, Okla., Oreg., Pa., S.C., Tenn., Tex., Utah, Va., Wash., W.Va.; w Eurasia; introduced also in Central America, South America, e Asia (Japan), South Africa, Australia.

Herbarium specimens of Cardamine hirsuta have been misidentified as C. oligosperma .

Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Cardamine+hirsuta&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Cardamine+hirsuta&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

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Number of matches : 37
Query: SELECT * FROM img WHERE ready=1 and taxon like "Cardamine hirsuta%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Cardamine hirsuta
Cardamine hirsuta
Hairy Bittercress
ID: 0000 0000 0505 2127 [detail]
© 2005 Luigi Rignanese

Cardamine hirsuta
Cardamine hirsuta
Hairy Bittercress
ID: 0000 0000 0505 2132 [detail]
© 2005 Luigi Rignanese

Cardamine hirsuta
Cardamine hirsuta
Hairy Bittercress
ID: 0000 0000 0505 2417 [detail]
© 2005 Luigi Rignanese

Cardamine hirsuta
Cardamine hirsuta
Hairy Bittercress
ID: 0000 0000 0505 2420 [detail]
© 2005 Luigi Rignanese

Cardamine hirsuta
Cardamine hirsuta
Hairy Bittercress
ID: 0000 0000 0505 2525 [detail]
© 2005 Luigi Rignanese

Cardamine hirsuta
Cardamine hirsuta
Hairy Bittercress
ID: 0000 0000 0505 2528 [detail]
© 2005 Luigi Rignanese

Cardamine hirsuta
Cardamine hirsuta
ID: 0000 0000 0306 0734 [detail]
© 2006 Luigi Rignanese

Cardamine hirsuta
Cardamine hirsuta
Hairy Bittercress
ID: 0000 0000 0408 0711 [detail]
© 2008 Gary McDonald

Cardamine hirsuta
Cardamine hirsuta
Hairy Bittercress
ID: 0000 0000 0408 0710 [detail]
© 2008 Gary McDonald

Cardamine hirsuta
Cardamine hirsuta
Hairy Bitter-cress
ID: 0000 0000 0307 0020 [detail]
© 2007 Dr. Amadej Trnkoczy

Cardamine hirsuta
Cardamine hirsuta
Hairy Bitter-cress
ID: 0000 0000 0307 0021 [detail]
© 2007 Dr. Amadej Trnkoczy

Cardamine hirsuta
Cardamine hirsuta
Hairy Bitter-cress
ID: 0000 0000 0307 0022 [detail]
© 2007 Dr. Amadej Trnkoczy

Cardamine hirsuta
Cardamine hirsuta
Hairy Bitter-cress
ID: 0000 0000 0307 0023 [detail]
© 2007 Dr. Amadej Trnkoczy

Cardamine hirsuta
Cardamine hirsuta
Hairy Bitter-cress
ID: 0000 0000 0307 0024 [detail]
© 2007 Dr. Amadej Trnkoczy

Cardamine hirsuta
Cardamine hirsuta
Hairy Bittercress
ID: 0000 0000 0408 0709 [detail]
© 2008 Gary McDonald

Cardamine hirsuta
Cardamine hirsuta
ID: 0000 0000 0211 3380 [detail]
© 2011 Robert Steers

Cardamine hirsuta
Cardamine hirsuta
Hairy Bittercress
ID: 0000 0000 0209 1130 [detail]
© 2009 Howard Orman Clark, Jr.

Cardamine hirsuta
Cardamine hirsuta
ID: 0000 0000 1010 2476 [detail]
© 2010 Robert Steers

Cardamine hirsuta
Cardamine hirsuta
Hairy Bittercress
ID: 0000 0000 1111 2014 [detail]
© 2011 Aaron Arthur

Cardamine hirsuta
Cardamine hirsuta
hairy bitter-cress
ID: 0000 0000 0214 0666 [detail]
© 2014 Al Keuter

Cardamine hirsuta
Cardamine hirsuta
hairy bitter-cress
ID: 0000 0000 0314 0155 [detail]
© 2014 Al Keuter

Cardamine hirsuta
Cardamine hirsuta
hairy bitter-cress
ID: 0000 0000 0314 0156 [detail]
© 2014 Al Keuter

Cardamine hirsuta
Cardamine hirsuta
hairy bitter-cress
ID: 0000 0000 0314 1554 [detail]
© 2014 Al Keuter

Cardamine hirsuta
Cardamine hirsuta
ID: 0000 0000 0316 2126 [detail]
© 2016 John Doyen

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   


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