Difference between revisions of "Packera cymbalaria"
Bot. Not. 128: 497. 1976.
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|name=Cineraria lyrata | |name=Cineraria lyrata | ||
|authority=Ledebour | |authority=Ledebour | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=Packera resedifolia | |name=Packera resedifolia | ||
|authority=(Lessing) Á. Löve & W. A. Weber | |authority=(Lessing) Á. Löve & W. A. Weber | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=S. fernaldii | |name=S. fernaldii | ||
|authority=Greenman | |authority=Greenman | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=S. resedifolius | |name=S. resedifolius | ||
|authority=Lessing. | |authority=Lessing. | ||
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|elevation=0–1900 m | |elevation=0–1900 m | ||
|distribution=Alta.;B.C.;Nfld. and Labr. (Nfld.);N.W.T.;Que.;Yukon;Alaska. | |distribution=Alta.;B.C.;Nfld. and Labr. (Nfld.);N.W.T.;Que.;Yukon;Alaska. | ||
| − | |discussion=<p>Packera cymbalaria occurs in three, disjunct regions: western Alaska eastward into western N.W.T. and south into northwestern British Columbia; Newfoundland and the Gaspé Peninsula, Quebec; and Siberia. Considerable morphologic overlap exists between western and eastern populations in North America; western populations have slightly different flavonoid chemistries and chromosome numbers. Western populations are either diploid or tetraploid; eastern populations are hexaploid. The correct name for this species may prove to be Packera heterophylla (Fischer) E. Wiebe, based on Cineraria heterophylla Fischer.</p> | + | |discussion=<p><i>Packera cymbalaria</i> occurs in three, disjunct regions: western Alaska eastward into western N.W.T. and south into northwestern British Columbia; Newfoundland and the Gaspé Peninsula, Quebec; and Siberia. Considerable morphologic overlap exists between western and eastern populations in North America; western populations have slightly different flavonoid chemistries and chromosome numbers. Western populations are either diploid or tetraploid; eastern populations are hexaploid. The correct name for this species may prove to be <i>Packera</i> heterophylla (Fischer) E. Wiebe, based on Cineraria heterophylla Fischer.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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|publication year=1976 | |publication year=1976 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V20_1297.xml |
|tribe=Asteraceae tribe Senecioneae | |tribe=Asteraceae tribe Senecioneae | ||
|genus=Packera | |genus=Packera | ||
Revision as of 15:19, 18 September 2019
Perennials, 6–25+ cm; rhizomatous (mat forming, rhizomes horizontal to suberect, branched). Stems usually 1 (sometimes more, clustered), usually glabrous, sometimes bases and leaf axils tomentose. Basal leaves petiolate; blades ovate to obovate, lyrate, or reniform, 10–30+ × 10–25+ mm, bases cuneate (sometimes tapering to winged petioles) to subcordate or contracted, margins crenate, dentate, or weakly lobed. Cauline leaves abruptly reduced (sessile, not clasping; lanceolate, entire or pinnately lobed to pinnatisect). Heads 1–2. Peduncles 0 or relatively reduced (then densely tomentose). Calyculi conspicuous (bractlets cyanic). Phyllaries 21, deep red or green (tips red), 6–8 mm, glabrous. Ray florets 0 or 11–13; corolla laminae (yellow, purple streaks in veins) 10–14+ mm. Disc florets 60–75+; corolla tubes 2–2.5 mm, limbs 4–5 mm. Cypselae 1.5–2 mm, glabrous; pappi 5–6 mm. 2n = 46, 92, 138.
Phenology: Flowering mid Jun–early Aug.
Habitat: Exposed rocky slopes, tundra turf
Elevation: 0–1900 m
Distribution
Alta., B.C., Nfld. and Labr. (Nfld.), N.W.T., Que., Yukon, Alaska.
Discussion
Packera cymbalaria occurs in three, disjunct regions: western Alaska eastward into western N.W.T. and south into northwestern British Columbia; Newfoundland and the Gaspé Peninsula, Quebec; and Siberia. Considerable morphologic overlap exists between western and eastern populations in North America; western populations have slightly different flavonoid chemistries and chromosome numbers. Western populations are either diploid or tetraploid; eastern populations are hexaploid. The correct name for this species may prove to be Packera heterophylla (Fischer) E. Wiebe, based on Cineraria heterophylla Fischer.
Selected References
None.