Difference between revisions of "Tithonia thurberi"
Proc. Amer. Acad. Arts 8: 655. 1873.
Common names: Arizona sunflowerweed
Synonyms: Tithonia palmeri Rose
Treatment appears in FNA Volume 21. Treatment on page 139.
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|name=Tithonia palmeri | |name=Tithonia palmeri | ||
|authority=Rose | |authority=Rose | ||
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|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Helianthinae;Tithonia;Tithonia thurberi | |hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Helianthinae;Tithonia;Tithonia thurberi | ||
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name=Tithonia thurberi | name=Tithonia thurberi | ||
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|authority=A. Gray | |authority=A. Gray | ||
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| − | |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_338.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae | ||
Revision as of 19:36, 16 December 2019
Annuals, 70–200 cm. Leaves: petioles 0–3.3 cm; blades deltate, 7–28 × 5.5–21.5 cm, abaxial faces sparsely hirsute (hairs larger on veins). Peduncles 17–36 cm. Phyllaries 13–16 in 3 series, linear to spatulate; outer 8–15 × 2.5–4.5 mm, apices acute, abaxial faces puberulent; inner 12–15.5 × 3.5–7 mm, apices acute, abaxial faces glabrous. Paleae 11–16.5 × 2–4 mm, mucros 3 mm. Ray florets 7–10; corollas yellow, laminae oblong, 9–15 × 4–6 mm. Disc florets 40–60. Cypselae 6–9 mm. 2n = 34.
Phenology: Flowering Aug–Sep.
Habitat: Disturbed areas, canyons, watercourses
Elevation: 900–1000 m
Distribution
Ariz., Mexico (Sonora).
Discussion
Selected References
None.
Lower Taxa
None.