Difference between revisions of "Tetragonotheca"
Sp. Pl. 2: 903. 1753.
Gen. Pl. ed. 5, 384. 1754.
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|discussion=<p>Species 4 (4 in the flora).</p> | |discussion=<p>Species 4 (4 in the flora).</p> | ||
|tables= | |tables= | ||
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|family=Asteraceae | |family=Asteraceae | ||
|distribution=s United States;n Mexico. | |distribution=s United States;n Mexico. | ||
| − | |reference= | + | |reference=None |
|publication title=Sp. Pl.;Gen. Pl. ed. | |publication title=Sp. Pl.;Gen. Pl. ed. | ||
|publication year=1753;1754 | |publication year=1753;1754 | ||
|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/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V21_435.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Galinsoginae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Galinsoginae | ||
Revision as of 20:36, 16 December 2019
Perennials, mostly 30–120 cm. Stems erect. Leaves basal and/or cauline; mostly opposite; petiolate, subpetiolate, or sessile (bases sometimes connate-perfoliate); blades lanceolate, ovate, rhombic, or rounded-deltate, sometimes pinnatifid, ultimate margins usually toothed, faces glabrate, sparsely hispidulous, or puberulent, gland-dotted. Heads radiate, borne singly or in loose, corymbiform arrays. Involucres obpyramidal to hemispheric, 12–25+ mm diam. Phyllaries persistent, 10–25+ in ± 2 series (outer 4 broadly lanceolate, foliaceous, the inner ovate to lanceolate, smaller, more scarious, each subtending a ray floret). Receptacles conic, paleate (paleae persistent, lanceolate to lance-ovate, flat or weakly conduplicate, apices acute). Ray florets 6–21+, pistillate, fertile; corollas yellow (often with reddish nerves). Disc florets 25–150+, bisexual, fertile; corollas yellow, tubes (basally dilated) much shorter than ampliate, cylindric throats, lobes 5, deltate. Cypselae ± ovoid or plumply 4- or 5-angled, finely 32–40-ribbed, sparsely strigose or glabrous; pappi 0, or of 1–10+ subulate to acerose scales (to 0.5 mm), or of 16–30, ± spatulate scales (0.5–2 mm). x = 17.
Distribution
s United States, n Mexico.
Discussion
Species 4 (4 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Pappi of 16–30, ± obovate to spatulate scales 0.5–2 mm | > 2 |
| 1 | Pappi 0, or of 1–10+ subulate to acerose scales to 0.5 mm | > 3 |
| 2 | Leaves mostly cauline (distal connate-perfoliate); ray florets 12–13, laminae 8–18 mm | Tetragonotheca ludoviciana |
| 2 | Leaves mostly basal (cauline much smaller, none connate-perfoliate); ray florets 16–21+, laminae 20–30+ mm | Tetragonotheca repanda |
| 3 | Stems sparsely tomentulose or glabrous (nodes usually auriculate-appendaged); ray laminae 10–18 mm; cypselae ± quadrate, 2.5–4 mm | Tetragonotheca texana |
| 3 | Stems patently to retrorsely ± villous; ray laminae 20–40+ mm; cypselae ± ovoid, 4–6 mm | Tetragonotheca helianthoides |