Difference between revisions of "Phalacroseris"
Proc. Amer. Acad. Arts 7: 364. 1868.
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| − | --><p>The simple vegetative and floral morphology, including absence of indument and pappus, have made the subtribal assignment of Phalacroseris somewhat problematic. Most recent authors have followed G. L. Stebbins (1953), placing the genus in Microseridinae (H. J. Price and K. Bachmann 1975; R. K. Jansen et al. 1991b). In current molecular phylogenetic studies (J. Lee et al. 2003), Phalacroseris forms a sister group to a clade containing both Microseridinae and Stephanomeriinae of Stebbins’s classification. It was made a separate subtribe, Phalacroseridinae, by Lee and B. G. Baldwin (2004). The genome of P. bolanderi is unusually large, containing 2.5 times the DNA found in perennial taxa of Microseris having 2n = 18 (Price and Bachmann).</p> | + | --><p>The simple vegetative and floral morphology, including absence of indument and pappus, have made the subtribal assignment of <i>Phalacroseris</i> somewhat problematic. Most recent authors have followed G. L. Stebbins (1953), placing the genus in Microseridinae (H. J. Price and K. Bachmann 1975; R. K. Jansen et al. 1991b). In current molecular phylogenetic studies (J. Lee et al. 2003), <i>Phalacroseris</i> forms a sister group to a clade containing both Microseridinae and Stephanomeriinae of Stebbins’s classification. It was made a separate subtribe, Phalacroseridinae, by Lee and B. G. Baldwin (2004). The genome of <i>P. bolanderi</i> is unusually large, containing 2.5 times the DNA found in perennial taxa of <i>Microseris</i> having 2n = 18 (Price and Bachmann).</p> |
|tables= | |tables= | ||
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|publication year=1868 | |publication year=1868 | ||
|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_602.xml |
|tribe=Asteraceae tribe Cichorieae | |tribe=Asteraceae tribe Cichorieae | ||
|genus=Phalacroseris | |genus=Phalacroseris | ||
Revision as of 15:13, 18 September 2019
Perennials, 10–45 cm; caudices and taproots fleshy, with blackish periderms. Stems 1(–5), erect, simple, scapiform, glabrous. Leaves basal (in rosettes); petiolate; blades linear to oblanceolate (± fleshy), margins entire (apices obtuse to acuminate). Heads borne singly (erect). Calyculi 0. Involucres ± campanulate, (3–)5–10 mm diam. Phyllaries 8–25 in 2–4 series, basally ± connate, ± lanceolate, equal or some outer shorter, herbaceous, apices acute. Receptacles convex, smooth, glabrous, epaleate. Florets 13–35; corollas yellow. Cypselae brown with darker spots, columnar, truncate, not beaked, 4-nerved, smooth, glabrous; pappi 0, or coroniform (less than 0.5 mm). x = 9.
Discussion
Species 1.
The simple vegetative and floral morphology, including absence of indument and pappus, have made the subtribal assignment of Phalacroseris somewhat problematic. Most recent authors have followed G. L. Stebbins (1953), placing the genus in Microseridinae (H. J. Price and K. Bachmann 1975; R. K. Jansen et al. 1991b). In current molecular phylogenetic studies (J. Lee et al. 2003), Phalacroseris forms a sister group to a clade containing both Microseridinae and Stephanomeriinae of Stebbins’s classification. It was made a separate subtribe, Phalacroseridinae, by Lee and B. G. Baldwin (2004). The genome of P. bolanderi is unusually large, containing 2.5 times the DNA found in perennial taxa of Microseris having 2n = 18 (Price and Bachmann).
Selected References
None.