Click on the language to view common names.
Common Names in English:
Italian Thistle, Shore Thistle, Slender Thistle, Slender-Flower Plumless-Thistle, Slender-Flower Thistle, Slender-Flowered Thisle, Slender-Flowered Thisle, Slender-Flowered Thistle, Slenderflower Thistle, Winged Plumeless Thistle, Winged Plumeless Thistle, Winged Plumeless Thistle Carduus Tenuiflorus, Winged Thistle
Common Names in Portuguese:
The largest family of flowering plants , the Compositae (Asteraceae), comprising about 1,100 genera and more than 20,000 species and characterized by many small flowers arranged in a head looking like a single flower and subtended by an involucre of bracts. A head may consist of both ray flowers and disk flowers, as in the sunflower, of disk flowers only, as in the burdock, or of ray flowers only, as in the dandelion.
or biennials [perennials
], 30-200(-400) cm. spiny
, ± tomentose
, sometimes glabrate
. Stems erect
to much branched, (spiny-winged) . Leaves basal and cauline; petiolate
or sessile; blade
spiny dentate, often 1-2-pinnately lobed
. Heads discoid
, borne singly or 2-20 in dense clusters
arrays. (Peduncles naked or leafy-bracteate, spiny-winged or not winged
.) Involucres cylindric
to spheric. Phyllaries many in 7-10+ series, linear
to broadly ovate
, margins entire, apices ascending
, acute, spine-tipped. Receptacles flat, epaleate, bearing setiform
("flattened bristles"). Florets several-many; corollas white to pink or purple, ± bilateral
long, slender, throats
, abruptly expanded from tubes, lobes
bases sharply short-tailed, apical appendages
; style branches: fused portions with slightly, minutely puberulent
, swollen basal nodes, distally papillate
or glabrous, distinct
portions very short. Cypselae ovoid
, slightly compressed
, faces smooth
. glabrous, attachment scars
; pappi persistent
or falling in rings
. of many minutely barbed
, basally connate
or setiform, minutely barbed scales ("minutely flattened bristles"). x = 8, 9, 10, 11, 13.
Species ca. 90: introduced ; Eurasia , Africa.
Species Carduus tenuiflorus
Annuals, 20-200 cm. Stems simple
or openly branched,
with fine single-celled hairs
hairs; teeth of wings
to 25 mm, wing spines to 15
Leaves: basal tapered to winged
pinnately 6-10-lobed, abaxial
faces loosely tomentose and villous or ± glabrate
sessile, shorter, less divided
. Heads clustered in ±
tight arrays of 5-20+ at ends of stems, usually sessile, 15-22 mm
× 7-12 mm. Involucres cylindric
when pressed), 15-20 × 7-12 mm. Phyllaries
, 2-2.5 mm wide, ± glabrate,
0.5-1.5 mm wide, narrowly scarious-margined,
or minutely ciliolate
, spine tips
1-2 mm, inner
phyllaries with erect
, straight, unarmed
tips. Corollas pinkish,
10-14 mm; lobes
1.5-2.5 times longer
brown, 4-5 mm, finely 10-13-nerved; pappus bristles
mm. 2n = 54. Flowering spring-early summer (Apr-Jul).
Carduus pycnocephalus and C. tenuiflorus are similar annuals with small, usually tightly clustered heads. The number of heads per capitulescence is usually ultimately greater in C. tenuiflorus, but early season plants of this species often have only a few heads. At the end of the growing season the fruiting heads of C. tenuiflorus are aggregated in dense, subspheric clusters . Stem wings tend to be more pronounced in C. tenuiflorus. Fresh corollas of C. pycnocephalus are rose-purple whereas those of C. tenuiflorus have a more pinkish tinge, but this difference is subtle and not reliable on herbarium material . The phyllaries of C. tenuiflorus are membranous-margined, more or less glabrate, and lack the short, stiff, upwardly appressed trichomes of C. pycnocephalus. All published chromosome counts for Carduus tenuiflorus from both Old and New World material are the same. [source]
The two species sometimes grow in mixed populations and at times appear to intergrade . Hybridization has been reported in Europe (S. W. T. Batra et al. 1981) and is suspected to occur in California. Hybrids between C. pycnocephalus and C. tenuiflorus have been designated Carduus ×theriotii Rouy. [source]
Flowers: Bloom Period: March, April, May. • Flower Color: magenta
Size: 12-18" tall.
Aggressive weed of waste ground , pastures, roadsides, fields ; 0-1000 m .
Typically found at an altitude of 0 to 5,013 meters (0 to 16,447 feet).
Soil: Minimum pH: 5.1 • Maximum pH: 8.5
Sunlight: Sun Exposure: Full Sun .
Moisture: Drought Tolerance: High
Temperature: Cold Hardiness: Not Applicable (map)
- Whittaker & Margulis,1978
- Haeckel, 1866
- Cavalier-Smith, 1981
- Sinnott, 1935 ex Cavalier-Smith, 1998
- Vascular Plants
- Brongniart, 1843
- Takhtajan, 1967
- Takhtajan Ex Reveal, 1992
- Lindley, 1833
- Family: Compositae () - Giseke, 1792, nom. cons., nom. alt.
- Order: Asterales () - Lindley, 1833
- Superorder: Campanulanae () - Takhtajan Ex Reveal, 1992
- Subclass: Asteridae () - Takhtajan, 1967
- Class: Spermatopsida () - Brongniart, 1843
- Subphylum: Euphyllophytina ()
- Phylum: Tracheophyta () - Sinnott, 1935 ex Cavalier-Smith, 1998 - Vascular Plants
- Subkingdom: Viridaeplantae () - Cavalier-Smith, 1981
- Kingdom: Plantae () - Haeckel, 1866 - Plants
Carduus Pycnocephalus Tenuiflorus
Status: Accepted Name
Comment: Data Providers: African Flowering Plants Database , SANBI, New Zealand Plant Name Database, Govaerts World Compositae Checklist A-G, IPNI, Tropicos, Euro+Med, Flora of Tasmania Online, Australian Capital Territory Census, Queensland Census, New South Wale. GCC LSID: urn :lsid:compositae.org:names:91DE7E59-9593-415A-A307-134134465D1C
Last scrutiny: 13-Nov-09
Members of the genus Carduus
ZipcodeZoo has pages for 11 species, subspecies, varieties, forms, and cultivars in this genus:
C. acanthoides (Plumeless Thistle) · C. crispus (Curled Plumless-Thistle) · C. nutans (Chardon Penche) · C. nutans macrocephalus (Musk Thistle) · C. nutans macrolepis (Chardon Penche) · C. nutans var. litoralis (Nodding Thistle) · C. orthocephalus (Plumeless Thistle) · C. pycnocephalus (Compact-Headed Thistle) · C. scariosus (Meadow Thistle) · C. tenuiflorus (Italian Thistle) · C. x orthocephalus (Plumeless Thistle)
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Accessed through GBIF Data Portal February 16, 2008:
- Australian National Herbarium
- , Australian National Herbarium
- Berkeley Natural History Museums, University and Jepson Herbaria DiGIR provider
- Bundesamt für Naturschutz / Zentralstelle für Phytodiversität Deutschland, Bundesamt fuer Naturschutz / Zentralstelle fuer Phytodiversitaet Deutschland
- Conservatoire botanique national du Bassin parisien, Observations du Conservatoire botanique national du Bassin parisien.
- GBIF-Spain, Botánica, Universidad de León: LEB-Cormo
- GBIF-Spain, Dirección General de Investigación, Desarrollo Tecnológico e Innovación de la Junta de Extremadura(DGIDTI): HSS
- GBIF-Spain, Dpto de Botánica, Ecología y Fisiología Vegetal
- .Facultad de Ciencias.Universidad de Córdoba
- GBIF-Spain, Herbario Universidad de Málaga: MGC-Cormófitos
- GBIF-Spain, Hortus Botanicus Sollerensis Herbarium
- GBIF-Spain, Jardín Botánico de Córdoba: Herbarium COA
- GBIF-Spain, Real Jardin Botanico
- , Vascular Plant Herbarium
- GBIF-Spain, Universidad de Almería, HUAL
- GBIF-Spain, Universidad de Extremadura, UNEX
- Missouri Botanical Garden, Missouri Botanical Garden
- National Herbarium of New South Wales, NSW herbarium collection
- Oregon State University, Vascular Plant Collection
- UK National Biodiversity Network, Botanical Society of the British Isles - Vascular Plants Database
- USDA PLANTS, USDA PLANTS Database
- Biodiversity Heritage Library NamebankID: 2657420
- Catalogue of Life Accepted Name Code: Ast-607
- Global Biodiversity Information Facility Taxonkey: 5190438
- Globally Unique Identifier: urn:lsid:ipni.org:names:189106-1
- GRIN Nomen Number: 316604
- Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 35789
- Natural Heritage Network Species Identifier: PDAST1S060
- U.S.D.A. Plant Symbol: CATE2
- Zipcode Zoo Species Identifier: 12761
- David J. Keil "Carduus". in Flora of North America Vol. 19, 20 and 21 Page 57, 66, 83, 91, 96, 97, 122. Oxford University Press. Online at EFloras.org. [back]
- "Carduus tenuiflorus". in Flora of North America Vol. 19, 20 and 21 Page 91, 94. Oxford University Press. Online at EFloras.org. [back]
- Mean = 593.040 meters (1,945.669 feet), Standard Deviation = 780.230 based on 3,768 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]