Difference between revisions of "Shinnersoseris"
Sida 5: 186, figs. 1–3. 1974.
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|distribution=c North America. | |distribution=c North America. | ||
|discussion=<p>Species 1.</p><!-- | |discussion=<p>Species 1.</p><!-- | ||
| − | --><p>Shinnersoseris rostrata was included in Lygodesmia; Tomb presented evidence for placing it in a separate genus. It differs from Lygodesmia in having opposite proximal leaves, shorter, obscure ligules, shorter style branches, 8–10-ribbed cypselae, echinate pollen, and a different base chromosome number (x = 9 in Lygodesmia.)</p> | + | --><p><i>Shinnersoseris rostrata</i> was included in <i>Lygodesmia</i>; Tomb presented evidence for placing it in a separate genus. It differs from <i>Lygodesmia</i> in having opposite proximal leaves, shorter, obscure ligules, shorter style branches, 8–10-ribbed cypselae, echinate pollen, and a different base chromosome number (x = 9 in <i>Lygodesmia</i>.)</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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|publication year=1974 | |publication year=1974 | ||
|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/V19_589.xml |
|tribe=Asteraceae tribe Cichorieae | |tribe=Asteraceae tribe Cichorieae | ||
|genus=Shinnersoseris | |genus=Shinnersoseris | ||
Revision as of 15:13, 18 September 2019
Annuals, 5–85 cm (herbage glabrous); taprooted (roots deep, slender to thick). Stems usually 1, erect, simple proximally, branched distally, glabrous. Leaves cauline (opposite proximally); ± sessile; blades linear to filiform, margins entire. Heads borne singly. Peduncles not inflated distally, usually bracteate. Calyculi of 8, ovate to lanceolate bractlets. Involucres narrowly cylindric, 4–5 mm diam. Phyllaries 8 in 1–2 series, linear, margins scarious, apices acute (keeled). Receptacles flat, pitted, glabrous, epaleate. Florets 8–11; corollas pale purple or lavender, with white-tips. Cypselae pale green or tan, subcylindric to ± fusiform, apices abruptly constricted, not beaked, ribs 8–10, scabrous distally; pappi of 30–50, basally connate, white, ± equal, smooth or barbellulate bristles in ± 1 series. x = 6.
Distribution
c North America.
Discussion
Species 1.
Shinnersoseris rostrata was included in Lygodesmia; Tomb presented evidence for placing it in a separate genus. It differs from Lygodesmia in having opposite proximal leaves, shorter, obscure ligules, shorter style branches, 8–10-ribbed cypselae, echinate pollen, and a different base chromosome number (x = 9 in Lygodesmia.)
Selected References
None.