Difference between revisions of "Cirsium helenioides"
Hort. Kew., 64. 1768.
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|common_names=Melancholy thistle | |common_names=Melancholy thistle | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=C | ||
| + | |label=Conservation concern | ||
| + | }} | ||
|basionyms={{Treatment/ID/Basionym | |basionyms={{Treatment/ID/Basionym | ||
|name=Carduus helenioides | |name=Carduus helenioides | ||
|authority=Linnaeus | |authority=Linnaeus | ||
| + | |rank=species | ||
|publication_title=Sp. Pl. | |publication_title=Sp. Pl. | ||
|publication_place=2: 825. 1753 | |publication_place=2: 825. 1753 | ||
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|name=Cirsium heterophyllum | |name=Cirsium heterophyllum | ||
|authority=(Linnaeus) Hill | |authority=(Linnaeus) Hill | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Cardueae;Cirsium;Cirsium helenioides | |hierarchy=Asteraceae;Asteraceae tribe Cardueae;Cirsium;Cirsium helenioides | ||
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name=Cirsium helenioides | name=Cirsium helenioides | ||
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|authority=(Linnaeus) Hill | |authority=(Linnaeus) Hill | ||
|rank=species | |rank=species | ||
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|publication title=Hort. Kew., | |publication title=Hort. Kew., | ||
|publication year=1768 | |publication year=1768 | ||
| − | |special status= | + | |special status=Conservation concern |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V19_55.xml |
|tribe=Asteraceae tribe Cardueae | |tribe=Asteraceae tribe Cardueae | ||
|genus=Cirsium | |genus=Cirsium | ||
Latest revision as of 19:53, 5 November 2020
Perennials, 40–120 cm; runner roots. Stems single, erect, ± arachnoid-tomentose; branches 0 or few, ascending. Leaves oblong to broadly lanceolate, 20–40 × 4–8 cm, finely spinulose-dentate or proximal cauline pinnatifid, lobes undivided, finely spinulose-dentate, main spines 1–2 mm, abaxial faces white-tomentose (with non-septate trichomes), adaxial glabrous; basal present at flowering, petiolate, bases tapered; cauline sessile, reduced distally, bases clasping, not decurrent; distal (few, well separated), oblong or linear, the uppermost reduced to linear bracts. Heads borne singly or less commonly 2–5 in terminal clusters. Peduncles 2–10(–30) cm (elevated above distal leaves). Involucres broadly ovoid, 2–3 × 2–3.5 cm, glabrous or loosely arachnoid. Phyllaries in 8–10 series, imbricate, green, ovate or lanceolate (outer) to linear-lanceolate (inner), abaxial faces with a prominent elongate glutinous ridge, outer and middle tightly appressed, margins entire, apices with ascending, weak spines 0–1 mm; apices of inner phyllaries attenuate, flat. Corollas red-purple, 25–30 mm, tubes 10–23 mm, throats 8–14 mm (noticeably wider than tubes), lobes 7–10 mm; style tips 4–5 mm. Cypselae light brown, 3–5 mm, bodies and apical collars concolorous; pappi 20–30 mm. 2n = 34.
Phenology: Flowering summer (Jul–Aug).
Habitat: Fjordlands
Elevation: 0–50 m
Distribution
Greenland, Iceland, Europe, Asia.
Discussion
Cirsium helenioides is one of only two species of the genus that have native populations in the Old World and the flora area. Neither reaches the North American mainland.
The conservation status of Cirsium helenioides is not known; it is known in the flora area only from a single fjord and possibly should be considered of conservation concern.
of conservation concern
Selected References
None.