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Cirsium altissimum (L.) Hill
TALL THISTLE
Life   Plantae   Dicotyledoneae   Asteraceae   Cirsium

Cirsium altissimum, whole plant - in flower - general view
© Copyright Steve Baskauf, 2002-2011 · 4
Cirsium altissimum, whole plant - in flower - general view

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Cirsium altissimum, leaf - basal or on lower stem
© Copyright Steve Baskauf, 2002-2011 · 4
Cirsium altissimum, leaf - basal or on lower stem
Cirsium altissimum, leaf - on upper stem
© Copyright Steve Baskauf, 2002-2011 · 4
Cirsium altissimum, leaf - on upper stem

Cirsium altissimum, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Cirsium altissimum, inflorescence - whole - unspecified
Cirsium altissimum, inflorescence - frontal view of flower
© Copyright Steve Baskauf, 2002-2011 · 4
Cirsium altissimum, inflorescence - frontal view of flower

Cirsium altissimum, inflorescence - ventral view of flower + perianth
© Copyright Steve Baskauf, 2002-2011 · 4
Cirsium altissimum, inflorescence - ventral view of flower + perianth
Cirsium altissimum, stem - showing leaf bases
© Copyright Steve Baskauf, 2002-2011 · 4
Cirsium altissimum, stem - showing leaf bases

Cirsium altissimum, Tall thistle
© Copyright Kyndall Dye 2011 · 1
Cirsium altissimum, Tall thistle
Cirsium altissimum, Tall thistle
© Copyright Kyndall Dye 2011 · 1
Cirsium altissimum, Tall thistle

Cirsium altissimum, Tall thistle
© Copyright Kyndall Dye 2011 · 1
Cirsium altissimum, Tall thistle
Cirsium altissimum, Tall thistle
© Copyright Kyndall Dye 2011 · 1
Cirsium altissimum, Tall thistle

Cirsium altissimum, flower
© George Yatskievych, 2003 · 1
Cirsium altissimum, flower
Cirsium altissimum, seed
© Copyright Seeds USID 2015 · 1
Cirsium altissimum, seed

Cirsium altissimum, seed
© Copyright Seeds USID 2015 · 1
Cirsium altissimum, seed

Hosts · map
FamilyScientific name @ source (records)
Asteraceae  Cirsium altissimum @ I_EHAN (3)

Associates · map
FamilyScientific name @ source (records)
Aphididae  Uroleucon ( @ NCSU (4)
Apidae  Bombus pensylvanicus @ AMNH_BEE (8)

Ceratina mikmaqi @ AMNH_BEE (1)

Melissodes desponsa @ AMNH_BEE (5)

Triepeolus donatus @ AMNH_BEE (1)
Asteraceae  Cirsium altissimum @ I_EHAN (3)
Erysiphaceae  Erysiphe cichoracearum @ BPI (3)
Megachilidae  Megachile latimanus @ AMNH_BEE (1)
Mycosphaerellaceae  Septoria cirsii @ BPI (2)

Septoria commonsii @ BPI (3)
Phaeosphaeriaceae  Stagonospora cirsii @ BPI (1)
Pucciniaceae  Puccinia cirsii @ BPI (6)
Tubeufiaceae  Acanthostigma occidentale @ BPI (3)
Venturiaceae  Venturia occidentalis @ BPI (1)

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Following modified from MissouriPlants.com
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Cirsium altissimum f. moorei Steyerm.

Cirsium altissimum plant

Family - Asteraceae

Stems - To +3m, glabrous, not completely winged by extended leaf tissue.

Leaves - Glabrous or slightly hairy above, hairy below, no spines on upper surface, alternate, larger below, reduced towards inflorescence. Margins toothed or lobed or not, flat, spiny.

Inflorescence - Single flower-head terminating each branch of the inflorescence.

Involucre - 2-3.5cm long(high). Bracts imbricate, tightly appressed, ending in spine-like prickle.

Flowers - All discoid, no rays present. Pappus of plumose bristles.

Cirsium altissimum flower

Flowering - July - October.

Habitat - Slopes, thickets, roadsides, railroads, open woodland.

Origin - Native to U.S.

Other info. - This form of C. altissimum is not often found in Missouri. The more common C. altissimum f. altissimum , with pink-rose flowers, is the plant most often seen. This plant can be found on the "Pink Flowers" page of this web site.
" altissimum " means "tall" or "the tallest" in Latin and this plant certainly is, being the tallest member of this genus in Missouri.

Photographs taken at the Kansas City Zoo, 9-5-99.


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Following modified from MissouriPlants.com
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Cirsium altissimum (L.) Spreng.

Cirsium altissimum plant

Family - Asteraceae

Stems - To +3m tall, branching, herbaceous, erect, striate, pubescent.

Cirsium altissimum stem Stem.

Leaves - Alternate, typically glabrous above, densely pubescent to lanate below, mostly entire with spined margins, sometimes lobed, to +30cm long, +10cm wide, sessile or short-petiolate, typically lanceolate, oblong, or elliptic, reduced towards apex.

Cirsium altissimum leaf Abaxial surface of leaf.

Cirsium altissimum basals Basal rosette.

Inflorescence - Single flower heads terminating stems.

Involucre - To 3.5cm tall, +3cm wide, subglobose to vase-shaped. Phyllaries imbricate, appressed, spine (bristle) tipped, typically with a lighter midrib.

Cirsium altissimum involucre Involucre with the subtending bracts.

Cirsium altissimum involucre Involucre with the subtending bracts removed.

Ray flowers - Absent.

Disc flowers - Corolla pink to rose, to +30mm long, tubular, 5-lobed. Style well exserted. Achenes to 6mm long, 2mm wide. Pappus of numerous plumose bristles.

Cirsium altissimum flowers

Cirsium altissimum flower Individual floret.

Flowering - July - October.

Habitat - Dry woodlands, slopes, thickets, disturbed sites, waste ground, roadsides, railroads.

Origin - Native to U.S.

Other info. - This is the tallest of the plants in this genus in Missouri ( altissimum means "the tallest"). It is very common throughout the state except for the extreme southeastern corner. It is a common roadside plant in the Ozarks.
Steyermark lists a couple of forms for the species. The plant pictured above is form altissimum . This plant has the typical rose-pink corolla. Form moorei has a white corolla and is listed in the "White flowers alternate" section of this website. The latter is much less common.

Photographs taken in the Ozark Scenic Riverways, Shannon County, MO., 8-9-03.


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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=CIAL2 ---> https://plants.usda.gov/java/profile?symbol=CIAL2
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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+altissimum&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+altissimum&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
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Updated: 2017-12-14 11:03:52 gmt
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