Cirsium discolor

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Distribution Map: Based on vouchered plant specimens only. View county names by placing the mouse cursor over a particular county.

Species Distribution Map
Family:ASTERACEAE
Species:Cirsium discolor (Muhl. ex Willd.) Spreng.
Common Name:Field Thistle; Two Color Thistle
Habitat:**
Associated Ecological Communities:**
Growth Habit:Herb
Duration:Biennial
Category:Vascular
USDA Symbol:**
Plant Notes:Field Thistle is a native herbaceous biennial or weak perennial in the Sunflower family (Asteraceae). It occurs in the northern 2/3’s of Alabama. Field Thistle occurs in prairies, in cedar glades, in pastures, along woodland edges, and on roadsides. Each taproot produces a single stem. The stems are erect, 3-9 feet tall, pubescent, and leafy. The stems are unbranched below the middle. During the first year, the leaves form a basal rosette before the flowering stem is produced. Basal leaves are absent at the time of flowering. Stem leaves are alternate, sessile or with winged petioles, elliptic to lanceolate in outline, and dissected. The leaves are green above and glabrous or with a few scattered hairs. The lower surface of the leaf is white tomentose (densely matted with woolly hairs). The margins of the leaves are revolute (turned under). The dissections of the leaf blade are spine tipped. Flowers are produced in heads. The heads are arranged in corymbs or panicles. The heads are ovoid and thinly pubescent with cob-webby hairs. The phyllaries are green with a light central stripe and are spine tipped. The heads have lavender disc flowers and no ray flowers. The fruit is a tan achene with a tuff of white plumose (feather-like) pappus.--A. Diamond
Taxonomic Notes:**
Status:Native
References:**
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilyASTERACEAE - Aster family
Genus Cirsium
Species Cirsium discolor (Muhl. ex Willd.) Spreng. - Field Thistle; Two Color Thistle

Citation

Citation Cirsium discolor (Muhlenberg ex Willdenow) Sprengel, Syst. Veg., ed. 16 [Sprengel] 3: 373. 1826.
Basionym: Cnicus discolor Muhl. ex Willd. 1803.
Type: **

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Carduus discolor    

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort; choose a county or herbaria to filter the specimen data.

Counties included on distribution map: Calhoun, Clay, Greene, Jackson, Lauderdale, Lawrence, Lowndes, Madison, Marengo, Marshall, Morgan, Pickens, Tallapoosa, Wilcox, Winston

Counties represented by specimen data listed below:

Herbaria represented by specimen data listed below: ALNHS, AMAL, AUA, JSU, TROY, UNA, UWAL

Range of years during which specimens were collected: 1967 - 1967

Barcode / Accession No. County Coll. Date Collector &
Collection No.		 Herbarium &
Herbarium Name Used		 Image
TROY000041871 Wilcox 10 Sep 2014 Webb, Wayne K.
s.n.		 TROY
Cirsium discolor (Muhlenberg) Sprengel
JSU146238 Calhoun 30 Sep 1996 Hutchinson, Francine
2411		 JSU
Cirsium discolor (Muhlenberg) Sprengel
AUA000043980 Madison 8 Oct 2020 Hansen, Curtis J.
7900		 AUA
Cirsium Discolor (Muhl. Ex Willd.) Spreng.
UWAL0038148 Clay 01 Jun 2017 Spaulding, Daniel D.
14777		 UWAL
Cirsium discolor (Muhl. ex Willd.) Spreng.
UNA00027047 Greene 09 Sep 1967 Thomas, Joab L.
1163		 UNA
Cirsium discolor (Muhl. ex Willd.) Spreng.
JSU105320 Jackson 20 Aug 1998 Brodeur, Kristin R.
1360		 JSU
Cirsium discolor (Muhlenberg) Sprengel
UNA00067301 Pickens 06 Sep 2007 Schotz, Alfred
2070		 UNA
Cirsium discolor (Muhl. ex Willd.) Spreng.
AMAL00021122 Winston 09 Sep 2012 Spaulding, Daniel D.
13565		 AMAL
Cirsium discolor (Muhlenberg) Sprengel
UWAL0039914 Lowndes 03 Sep 2017 Diamond, Alvin R.
27913		 UWAL
Cirsium discolor (Muhlenberg) Sprengel
JSU105322 Marshall 20 Sep 1986 Whetstone, R. David
15717		 JSU
Cirsium discolor (Muhlenberg) Sprengel
TROY000045575 Lowndes 03 Sep 2017 Diamond, Alvin R.
27913		 TROY
Cirsium discolor (Muhlenberg) Sprengel
UWAL0012867 Marengo 04 Sep 2008 England, J. Kevin
1011		 UWAL
Cirsium discolor (Muhlenberg) Sprengel
JSU105321 Marshall 19 Oct 1992 Spaulding, Daniel D.
3275		 JSU
Cirsium discolor (Muhlenberg) Sprengel
ALNHS00001400 Lauderdale 22 Sep 2010 Holt, Brian D.
SC-401		 ALNHS
Cirsium discolor (Muhl.) Spreng.
AUA000002252 Tallapoosa 12 Aug 1974 Hutto, T.A.
471		 AUA
Cirsium Discolor (Muhl. Ex Willd.) Spreng.
UWAL0038149 Clay 01 Jun 2017 Spaulding, Daniel D.
14777		 UWAL
Cirsium discolor (Muhl. ex Willd.) Spreng.
UWAL0033380 Lawrence 04 Aug 2016 England, J. Kevin
6678		 UWAL
Cirsium discolor (Muhlenberg ex Willdenow) Sprengel
JSU105323 Morgan 15 Sep 1996 Spaulding, Daniel D.
9227		 JSU
Cirsium discolor (Muhlenberg) Sprengel
UWAL0019470 Wilcox 10 Sep 2014 Webb, Wayne K.
s.n.		 UWAL
Cirsium discolor (Muhlenberg) Sprengel
ALNHS00004408 Marengo 05 Oct 2016 Barger, T. Wayne
SP#2720		 ALNHS
Cirsium discolor (Muhl.) Spreng.
UWAL0015635 Lawrence 21 Sep 2013 England, J. Kevin
4563		 UWAL
Cirsium discolor (Muhlenberg) Sprengel
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