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Cirsium arvense (L.) Scop.
PERENNIAL THISTLE
Creeping thistle; Canada Thistle; Serratula arvensis L; Carduus arvensis L Robson; Cnicus arvensis L Roth; Breea arvensis L Less; Cephalonoplos arvensis L Fourr; Carduus lanatus Roxb ex Willd; Cirsium lanatum Roxb ex Willd Spreng

Life   Plantae   Dicotyledoneae   Asteraceae   Cirsium

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Cirsium arvense
© Copyright Bobby Hattaway 2011 · 5
Cirsium arvense
Cirsium arvense
© Copyright Bobby Hattaway 2011 · 5
Cirsium arvense

Cirsium arvense
© Copyright Bobby Hattaway 2011 · 5
Cirsium arvense
Cirsium arvense
© Copyright Bobby Hattaway 2011 · 5
Cirsium arvense

Cirsium arvense
© Copyright Bobby Hattaway 2011 · 5
Cirsium arvense
Cirsium arvense
© Les Mehrhoff, 2008-2010 · 4
Cirsium arvense

Cirsium arvense
© Copyright Mel Harte 2010 · 3
Cirsium arvense
Cirsium arvense
© Copyright Mel Harte 2010 · 3
Cirsium arvense

Cirsium arvense
© Copyright Mel Harte 2010 · 3
Cirsium arvense
Cirsium arvense
© Copyright Mel Harte 2010 · 3
Cirsium arvense

Cirsium arvense
© Copyright Mel Harte 2010 · 3
Cirsium arvense
Cirsium arvense
© Copyright Mel Harte 2010 · 3
Cirsium arvense

Cirsium arvense
© Copyright Mel Harte 2010 · 3
Cirsium arvense
Cirsium arvense
© Copyright Mel Harte 2010 · 3
Cirsium arvense

Associates · map
FamilyScientific name @ source (records)
Agaricaceae  Phoma cirsii @ BPI (1)
Albuginaceae  Albugo spinulosus @ BPI (10)

Albugo tragopogonis @ BPI (36)
Andrenidae  Andrena crataegi @ UCMS_ENT (2)

Andrena medionitens @ BBSL (1)

Andrena vicina @ UCMS_ENT (1)
Aphididae  Aphis ( @ AMNH_PBI (5); NCSU_ENT (4)

Brachycaudus ( @ CSUC_TCN (1); AMNH_PBI (2); NCSU_ENT (1)

Capitophorus carduinus @ NCSU_ENT (3)

Capitophorus elaeagni @ AMNH_PBI (2); NCSU_ENT (3)

Macrosiphum ( @ NCSU (1)

Uroleucon ( @ NCSU (7)
Apidae  Anthophora terminalis @ RMBL_ENT (1)

Anthophora urbana @ BBSL (1)

Apis mellifera @ BBSL (1); MLSB__N16- (13)

Bombus appositus @ BBSL (1)

Bombus ashtoni @ CUIC_ENT (4)

Bombus bimaculatus @ MLSB__N16- (1)

Bombus californicus @ BBSL__JPS (1)

Bombus caliginosus @ BBSL (2)

Bombus fervidus @ UCMS_ENT (1); BBSL__JPS (11)

Bombus flavifrons @ DART_ENT (1)

Bombus griseocollis @ MLSB__N16- (3); UCMS_ENT (1); BBSL (1)

Bombus huntii @ BBSL (3)

Bombus insularis @ BBSL (3)

Bombus lapidarius @ I_JSA (3)

Bombus mixtus @ BBSL (5)

Bombus occidentalis @ BBSL__JPS (2)

Bombus rufocinctus @ BBSL (27)

Bombus suckleyi @ BBSL (1)

Bombus vagans @ BBSL__JPS (1)

Ceratina calcarata @ MLSB__N16- (9); UCMS_ENT (6)

Ceratina dupla @ UCMS_ENT (4)

Ceratina mikmaqi @ UCMS_ENT (1)

Ceratina nanula @ BBSL (1)

Diadasia enavata @ BBSL (6)

Melissodes bimaculatus @ MLSB__N16- (1)

Melissodes desponsa @ CUIC_ENT (23)

Melissodes rivalis @ BBSL (1)

Melissodes subillatus @ MLSB__N16- (1)

Nomada articulata @ UCMS_ENT (1)

Svastra obliqua @ BBSL (1)

Triepeolus donatus @ CUIC_ENT (15)

Xylocopa virginica @ CUIC_ENT (1)
Botryosphaeriaceae  Phyllosticta cirsii @ BPI (2)
Braconidae  Lysiphlebus ( @ AMNH_PBI (3)
Ceratostomataceae  Sphaeroderma theleboloides @ BPI (1)
Chrysomelidae  Diabrotica undecimpunctata @ MLSB__N16- (1)
Coccinellidae  Harmonia axyridis @ MLSB__N16- (1)
Colletidae  Colletes fulgidus @ BBSL (1)

Colletes kincaidii @ BBSL (1)

Colletes phaceliae @ BBSL (4)

Colletes simulans @ CUIC_ENT (1)

Hylaeus affinis/modestus @ MLSB__N16- (1)

Hylaeus affinis @ UCMS_ENT (4)

Hylaeus bisinuatus @ BBSL (1)

Hylaeus episcopalis @ RMBL_ENT (1); BBSL (7)

Hylaeus modestus @ RMBL_ENT (1); UCMS_ENT (1)

Hylaeus schwarzii @ UCMS_ENT (1)

Hylaeus wootoni @ BBSL (1)

Leioproctus fulvescens @ BBSL (1)
Crabronidae  Bembix americana @ I_ADG (1)

Glenostictia pictifrons @ I_ADG (1)
Dermateaceae  Mollisia cinerea @ BPI (1)

Mollisia teucrii @ BPI (2)

Niptera carduorum @ BPI (1)
Erysiphaceae  Erysiphe cichoracearum @ BPI (3)

Erysiphe mayorii @ BPI (4)

Sphaerotheca fuliginea @ BPI (1)
Halictidae  Agapostemon angelicus @ BBSL (1)

Agapostemon virescens @ UCMS_ENT (7); BBSL (5)

Halictus farinosus @ BBSL (1)

Halictus ligatus @ UCMS_ENT (1)

Halictus tripartitus @ BBSL (2)

Lasioglossum coriaceum @ UCMS_ENT (1)

Lasioglossum egregium @ BBSL (1)

Lasioglossum pectorale @ UCMS_ENT (3)

Lasioglossum pilosum @ AMNH_BEE (1)

Lasioglossum pruinosum @ BBSL (1)

Lasioglossum sisymbrii @ BBSL (1)

Lasioglossum titusi @ BBSL (2)

Sphecodes confertus @ AMNH_BEE (2)
Helotiaceae  Cyathicula cyathoidea @ BPI (2)
Megachilidae  Heriades carinata @ MLSB__N16- (1)

Megachile brevis @ BBSL (1)

Megachile centuncularis @ MLSB__N16- (1)

Megachile frigida @ MLSB__N16- (1)

Megachile inermis @ CUIC_ENT (1)

Megachile latimanus @ CUIC_ENT (9); UCMS_ENT (1)

Megachile mendica @ MLSB__N16- (1)

Megachile pugnata @ CUIC_ENT (7)

Megachile texana @ BBSL (1)

Megachile wheeleri @ BBSL (2)

Osmia bruneri @ BBSL (1)

Osmia californica @ BBSL (1)

Osmia coloradensis @ BBSL__BBSLID (2)
Membracidae  Campylenchia latipes @ NCSU (1); UDCC_NRI (2)

Entylia carinata @ UDCC_TCN (56); UDCC_NRI (2); NCSU (6)
Miridae  Lygus hesperus @ NCSU_ENT (5)

Slaterocoris breviatus @ AMNH_PBI (1)

Stenotus binotatus @ NCSU_ENT (2)
Muscidae  Stomoxys calcitrans @ MLSB__N16- (1)
Mycosphaerellaceae  Mycosphaerella cirsii-arvensis @ BPI (7)

Ramularia cirsii-arvensis @ BPI (1)

Ramularia filaris @ BPI (1)

Septoria arvensis @ BPI (1)

Septoria cirsii @ BPI (31)
Nectriaceae  Fusarium tricinctum @ BPI (1)
Peronosporaceae  Bremia lactucae @ 786296A (1); BPI (6)
Phaeosphaeriaceae  Ophiobolus acuminatus @ BPI (4)

Ophiobolus cirsii @ BPI (1)
Pleosporaceae  Alternaria montanica @ BPI (1)
Pucciniaceae  Puccinia cirsii @ BPI (4)

Puccinia obtegens @ BPI (19)

Puccinia punctiformis @ BPI (232)

Puccinia suaveolens @ BPI (118); 786296B (1); 842765B (1); 842765A (1)

Puccinia @ BPI (1)
Rhytismataceae  Leptostroma herbarum @ BPI (1)
Syrphidae  Syritta pipiens @ MLSB__N16- (1)
Tricholomataceae  Helotium herbarum @ BPI (1)
Typhulaceae  Pistillaria micans @ BPI (1)

Typhula grevillei @ 296014A (1); 296014B (1)
_  Aecidiolum cirsii @ BPI (1)

Cystopus tragopogonis @ BPI (1)

Pyrenochaeta erysiphoides @ BPI (1)

Sphaeronaema sessatulae @ BPI (1)

Uredo suaveolens @ BPI (2)

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Following modified from PCA Alien Plant Working Group
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Following modified from Global Invasive Species Team, The Nature Conservancy
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Following modified from Delaware Wildflowers
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Delaware Wildflowers  •  Scientific names

Cirsium arvense (L.) Scop. Canada Thistle
Asteraceae — Aster family
Invasive non-native
Cirsium arvense
White Clay Creek State Park -- Possum Hill
June 2001 Cirsium arvense
Prides Crossing
September 2009 Cirsium arvense
White Clay Creek State Park -- Possum Hill
June 2011

Guide to Cirsium of Delaware

More information on this plant, from other sources.


Copyright David G. Smith

Delaware Wildflowers main page

Following modified from MissouriPlants.com
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Cirsium arvense (L.) Scop. - Canada Thistle

Cirsium arvense plant

Family - Asteraceae

Stems - To +1m tall, from horizontal rhizomes (deep), glabrous or very sparse pubescent at base, striate, herbaceous, erect, branching near apex, hollow.

Cirsium arvense stem

Leaves - Alternate, to -15cm long, 6-7cm broad, sessile, pinnately lobed, with spines on margins, sparse arachnoid pubescent (mostly on lobes below). Upper leaves less lobed to serrate.

Cirsium arvense leaf

Inflorescence - Single terminal flower heads in loose corymbiform arrangement. Branches of inflorescence (peduncles) arachnoid pubescent.

Involucre - To 1.5cm tall (long), 8-9mm in diameter, suburceolate. Phyllaries imbricate, appressed, with dark purple tips. Tips acute, to 1mm long, slightly spreading. Innermost phyllaries to 1.1cm long, 1.5mm broad, glabrous, with scarious margins. Outer phyllaries with sparse to moderate arachnoid pubescence.

Cirsium arvense involucre Involucre.

Ray flowers - Absent.

Disk flowers - Corolla pink, 5-lobed. Lobes 2.5-3mm long, linear, thickened at apex with small protuberance. Corolla tube 1.1cm long, lilac-whitish. Achenes to 2mm long, glabrous, white(in flower) terete to weakly 4-angled. Pappus of dense plumose bristles to 1cm long. Receptacle flat.

Cirsium arvense flowers

Cirsium arvense fruits Fruiting head.

Flowering - June - October.

Habitat - Fields, waste ground, roadsides, railroads.

Origin - Native to Europe.

Other info. - This is a nasty little plant. It is not too common in Missouri yet but most certainly will be soon. It is very common in states to the north and east. The plant is considered a noxious weed and should not be spread. It is quite aggressive and because of its deep rhizomes is very hard to eradicate.
C. arvense is dioecious and the flower heads are quite variable depending on if they are staminate or pistillate. The species can also vary on pubescence, flower color, and leaf shape. A white-flowered form, form albiflorum (Rand & Redf.) , has not yet been reported from Missouri.

Cirsium arvense white flowers

Photographs taken in Spencer, WI., 8-6-04.


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Following modified from Plants Database, United States Department of Agriculture
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http://plants.usda.gov/java/profile?symbol=CIAR4 ---> https://plants.usda.gov/java/profile?symbol=CIAR4
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Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Cirsium+arvense+var.+arvense&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=Cirsium+arvense+var.+arvense&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
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Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Cirsium+arvense&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=Cirsium+arvense&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
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Updated: 2018-01-22 17:12:24 gmt
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