Difference between revisions of "Cirsium lecontei"
Fl. N. Amer. 2: 458. 1843.
FNA>Volume Importer |
imported>Volume Importer |
||
| (6 intermediate revisions by 2 users not shown) | |||
| Line 8: | Line 8: | ||
}} | }} | ||
|common_names=Black or Le Conte’s thistle | |common_names=Black or Le Conte’s thistle | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=E | ||
| + | |label=Endemic | ||
| + | }}{{Treatment/ID/Special_status | ||
| + | |code=C | ||
| + | |label=Conservation concern | ||
| + | }} | ||
|basionyms= | |basionyms= | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
|name=Carduus lecontei | |name=Carduus lecontei | ||
|authority=(Torrey & A. Gray) Pollard | |authority=(Torrey & A. Gray) Pollard | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Cardueae;Cirsium;Cirsium lecontei | |hierarchy=Asteraceae;Asteraceae tribe Cardueae;Cirsium;Cirsium lecontei | ||
| Line 28: | Line 36: | ||
|distribution=Ala.;Fla.;La.;Miss.;N.C.;S.C. | |distribution=Ala.;Fla.;La.;Miss.;N.C.;S.C. | ||
|discussion=<p>Of conservation concern.</p><!-- | |discussion=<p>Of conservation concern.</p><!-- | ||
| − | --><p>Cirsium lecontei occurs on the southern coastal plain. R. J. Moore and C. Frankton (1969) suggested that it originated as a derivative of ancient hybridization between the ancestors of C. horridulum and C. nuttallii. They further suggested a relationship between C. lecontei and C. grahamii of Arizona and hypothesized an ancient dispersal from the southeastern coastal plain to the western cordillera. Although such relationships are possible, I have seen little support for them in my examination of these taxa. I think it is more likely that C. lecontei, C. horridulum, and C. nuttallii originated from a common stock, and that the resemblances between C. lecontei and C. grahamii are a result of convergence.</p> | + | --><p><i>Cirsium lecontei</i> occurs on the southern coastal plain. R. J. Moore and C. Frankton (1969) suggested that it originated as a derivative of ancient hybridization between the ancestors of <i>C. horridulum</i> and <i>C. nuttallii</i>. They further suggested a relationship between <i>C. lecontei</i> and <i>C. grahamii</i> of Arizona and hypothesized an ancient dispersal from the southeastern coastal plain to the western cordillera. Although such relationships are possible, I have seen little support for them in my examination of these taxa. I think it is more likely that <i>C. lecontei</i>, <i>C. horridulum</i>, and <i>C. nuttallii</i> originated from a common stock, and that the resemblances between <i>C. lecontei</i> and <i>C. grahamii</i> are a result of convergence.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
| Line 37: | Line 45: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Cirsium lecontei | name=Cirsium lecontei | ||
| − | |||
|authority=Torrey & A. Gray | |authority=Torrey & A. Gray | ||
|rank=species | |rank=species | ||
| Line 51: | Line 58: | ||
|publication title=Fl. N. Amer. | |publication title=Fl. N. Amer. | ||
|publication year=1843 | |publication year=1843 | ||
| − | |special status= | + | |special status=Endemic;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_61.xml |
|tribe=Asteraceae tribe Cardueae | |tribe=Asteraceae tribe Cardueae | ||
|genus=Cirsium | |genus=Cirsium | ||
Latest revision as of 19:53, 5 November 2020
Perennials but sometimes appearing biennial, 35–110 cm; taproots, sometimes with root sprouts. Stems 1–few, erect, distal 1/2 nearly naked, loosely arachnoid; branches 0–5(–10), stiffly ascending. Leaves: blades linear to oblong or narrowly elliptic, 15–25 × 1–4 cm, coarsely toothed to shallowly pinnatifid, lobes undivided or coarsely few-toothed, main spines 3–6 mm, abaxial faces often ± glabrate, loosely arachnoid when young, adaxial glabrous or sparingly villous with coarse, multicellular trichomes; basal sometimes absent at flowering, petiolate; principal cauline sessile, progressively reduced distally, bases clasping or ± decurrent; distal cauline few, widely separated, bractlike. Heads borne singly or less commonly 2–5(–10) in open, corymbiform arrays. Peduncles 5–30 cm (elevated above cauline leaves, not subtended by ring of involucre-like bracts). Involucres broadly cylindric to campanulate, 2.5–4 × 1.5–4 cm, loosely arachnoid, ± glabrate. Phyllaries in 6–10 series, imbricate, ovate or lanceolate (outer) to linear-lanceolate (inner), abaxial faces with prominent glutinous ridge, outer and middle tightly appressed, margins spinulose-serrulate, spines ascending, 0.5–2 mm; apices of inner flat, linear- acuminate. Corollas pink-purple, 22–45 mm, tubes 10–23 mm, throats 8–14 mm, lobes 7–10 mm; style tips 4–5 mm. Cypselae light brown, 5–5.75 mm, apical collars paler than body, ca. 0.75 mm; pappi 20–40 mm. 2n = 28, 32.
Phenology: Flowering spring–summer (May–Aug).
Habitat: Sandy pinelands of coastal plain, often in damp soil
Elevation: 0–150 m
Distribution
Ala., Fla., La., Miss., N.C., S.C.
Discussion
Of conservation concern.
Cirsium lecontei occurs on the southern coastal plain. R. J. Moore and C. Frankton (1969) suggested that it originated as a derivative of ancient hybridization between the ancestors of C. horridulum and C. nuttallii. They further suggested a relationship between C. lecontei and C. grahamii of Arizona and hypothesized an ancient dispersal from the southeastern coastal plain to the western cordillera. Although such relationships are possible, I have seen little support for them in my examination of these taxa. I think it is more likely that C. lecontei, C. horridulum, and C. nuttallii originated from a common stock, and that the resemblances between C. lecontei and C. grahamii are a result of convergence.
Selected References
None.