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Arctium minus (Hill) Bernh.
LESSER BURDOCK
Arctium minus subsp pubens (Bab) P Fourn; Arctium pubens Bab; Lappa minor Hill; Common burdock

Life   Plantae   Dicotyledoneae   Asteraceae   Arctium

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Arctium minus
© Copyright Bobby Hattaway 2011 · 5
Arctium minus
Arctium minus
© Copyright Bobby Hattaway 2011 · 5
Arctium minus

Arctium minus
© Copyright Bobby Hattaway 2011 · 5
Arctium minus
Arctium minus
© Copyright Bobby Hattaway 2011 · 5
Arctium minus

Arctium minus
© Copyright Bobby Hattaway 2011 · 4
Arctium minus
Arctium minus, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Arctium minus, inflorescence - whole - unspecified

Arctium minus, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Arctium minus, inflorescence - whole - unspecified
Arctium minus, leaf - on upper stem
© Copyright Steve Baskauf, 2002-2011 · 4
Arctium minus, leaf - on upper stem

Arctium minus, stem - showing leaf bases
© Copyright Steve Baskauf, 2002-2011 · 4
Arctium minus, stem - showing leaf bases
Arctium minus, leaf - margin of upper + lower surface
© Copyright Steve Baskauf, 2002-2011 · 4
Arctium minus, leaf - margin of upper + lower surface

Arctium minus
© Les Mehrhoff, 2008-2010 · 4
Arctium minus
Arctium minus
© Copyright Mel Harte 2010 · 3
Arctium minus

Arctium minus
© Copyright Mel Harte 2010 · 3
Arctium minus
Arctium minus
© Copyright Mel Harte 2010 · 3
Arctium minus

Associates · map
FamilyScientific name @ source (records)
Aphididae  Aphis ( @ NCSU_ENT (16)
Apidae  Bombus ashtoni @ AMNH_BEE (1)

Bombus vagans @ AMNH_BEE (1)
Botryosphaeriaceae  Phyllosticta lappae @ BPI (2)
Erysiphaceae  Erysiphe cichoracearum @ BPI (6)

Erysiphe depressa @ BPI (4)
Megachilidae  Megachile centuncularis @ BBSL (3)

Megachile pugnata @ AMNH_BEE (1)
Membracidae  Entylia carinata @ UDCC_TCN (1)
Mycosphaerellaceae  Cercospora arctii-ambrosiae @ BPI (2)

Septoria lapparum @ BPI (2)
Pleosporaceae  Pleospora vulgaris @ BPI (1)
Pucciniaceae  Puccinia balsamorrhizae @ BPI (1)

Puccinia bardanae @ BPI (167)

Puccinia bordanae @ BPI (1)

Puccinia calcitrapae @ BPI (6)
_  Ascochyta lappae @ 802084B (1); 802084A (1)

Euscelidius variegatus @ AMNH_PBI (52)

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Following modified from Delaware Wildflowers
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Delaware Wildflowers  •  Scientific names

Arctium minus Bernh. Lesser Burdock
Asteraceae — Aster family
Non-native
Arctium minus
Carousel Farm Park
July 2000

Guide to Arctium of Delaware

More information on this plant, from other sources.


Copyright David G. Smith

Delaware Wildflowers main page

Following modified from MissouriPlants.com
   Top | See original


Arctium minus Bernh. - Burr Dock

Arctium minus plant

Family - Asteraceae

Stems - To 2m tall, herbaceous, branching, greenish to reddish-purple, sparse arachnoid pubescent to glabrous, from stout taproot.

Leaves - Alternate, petiolate. Petiole sparse arachnoid pubescent, with adaxial groove, to +40cm long, typically hollow. Basal leaves very large, to +60 cm long. Cauline leaves reduced upward,  truncate or cordate at base, ovate, with arachnoid pubescence below, puberulent above. Margins sinuous to undulate or commonly crisped.

Arctium minus leaf Basal leaf and size 10 hiking boot.

Inflorescence - Loose pedunculate cymes of 1-4 flowers in upper leaf axils and terminating stems. Peduncles tomentose.

Involucre - (In flower) - To 1.3cm long(tall), +1cm in diameter, urceolate. Phyllaries linear-attenuate, uncinate and reddish at apex, to 1.5cm long, mostly glabrous but strigillose on margins near base. Involucre becoming slightly enlarged and globose in fruit.

Arctium minus plant Involucre.

Ray flowers - Absent.

Disc flowers - Corolla tube to 1cm long, constricted and white below, rose-pink above, glabrous, 5-lobed. Lobes acute, 1.3mm long, glabrous. Stamens 5, adnate at apex of constricted portion of corolla tube. Filaments white, glabrous, 3.5mm long. Anthers purple, connate around atyle, exserted, 3mm long. Style bifurcate, white, pubescent at base of stigmas. Achenes to 2.5mm long in flower(6mm in fruit), whitish, angled, glabrous(slightly rugose in fruit). Pappus of short barbellate bristles to -2mm long, white. Receptacle flat, with dense chaff. Chaff filiform, white, to 1cm long.

Flowering - July - September.

Habitat - Pastures, roadside ditches, low woods, streambanks.

Origin - Native to Europe.

Other info. - This is an unmistakable species in Missouri. The dense uncinate phyllaries of the involucre are an excellent characteristic for identification. The large basal leaves are usually withered by anthesis.
Don't get to close to the plant as the fruiting heads grab onto nearly everything.

Photographs taken at Geneva State Park, Geneva, Ohio, 8-4-00, and at Whirlpool State Park, Niagra Falls, NY., 8-6-00.


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Following modified from Plants Database, United States Department of Agriculture
   Top | See original

http://plants.usda.gov/java/profile?symbol=ARMI2 ---> https://plants.usda.gov/java/profile?symbol=ARMI2
&pull 20q v4.662 20091102: Error 501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed) https://plants.usda.gov/java/profile?symbol=ARMI2

Following modified from CalPhotos
   Top | See original

http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Arctium+minus&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=Arctium+minus&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
&pull 20q v4.662 20091102: Error 501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed) https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Arctium+minus&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

Updated: 2017-12-18 07:49:46 gmt
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