Difference between revisions of "Thymophylla aurea"
in N. L. Britton and A. Brown, Ill. Fl. N. U.S. 3: 453. 1898.
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|accepted_name=Thymophylla aurea | |accepted_name=Thymophylla aurea | ||
| − | |accepted_authority=(A. Gray) Greene | + | |accepted_authority=(A. Gray) Greene |
|publications={{Treatment/Publication | |publications={{Treatment/Publication | ||
|title=in N. L. Britton and A. Brown, Ill. Fl. N. U.S. | |title=in N. L. Britton and A. Brown, Ill. Fl. N. U.S. | ||
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name=Thymophylla aurea | name=Thymophylla aurea | ||
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|rank=species | |rank=species | ||
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|publication year=1898 | |publication year=1898 | ||
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|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Pectidinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Pectidinae | ||
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Revision as of 21:13, 5 November 2020
Annuals, green, to 20(–30) cm, glabrous or puberulent. Stems erect (branched from bases). Leaves alternate; blades 15–40 mm overall, lobed, lobes 5–13, linear. Peduncles 10–70 mm, glabrous or puberulent. Calyculi 0, or of 1–2 subulate bractlets, lengths less than 1/2 phyllaries. Involucres obconic to campanulate, 5–6 mm. Phyllaries 12–15, margins of outer distinct almost to bases, abaxial faces glabrous or puberulent. Ray florets 8–12; corollas bright yellow, laminae 4–6 × 2–3 mm. Disc florets 30–45; corollas yellow, 3 mm. Cypselae 3 mm; pappi either of erose scales 0.3–0.6 mm, or of 3–5-aristate scales 2–3 mm.
Distribution
Colo., Kans., N.Mex., Tex., n Mexico.
Discussion
Varieties 2 (2 in the flora).
The two varieties of Thymophylla aurea are sometimes found in mixed populations, which may include intermediate plants.
Selected References
None.
Key
| 1 | Pappi of 18–20, 3–5-aristate scales 2–3 mm | Thymophylla aurea var. polychaeta |
| 1 | Pappi of 8–10 erose scales 0.3–0.6 mm | Thymophylla aurea var. aurea |