Compilation
Tagetes rotundifolia

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Name

Identification
Tagetes rotundifolia Mill. [family ASTERACEAE ] Verified by John C. La Duke, Tithonia rotundifolia (Mill.) S.F.Blake [family ASTERACEAE ] (stored under name); Verified by John C. La Duke,
Related name
  • Tithonia rotundifolia
  • Tagetes rotundifolia

Flora

Entry for Tithonia rotundifolia (Miller) S. F. Blake [family COMPOSITAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 21,
Names
Tithonia rotundifolia (Miller) S. F. Blake [family COMPOSITAE], Contr. Gray Herb., 52: 41. 1917
Tagetes rotundifolia Miller [family COMPOSITAE], Gard. Dict. ed., 8, Tagetes no. 4. 1768
Treatment Author(s)
John C. La Duke
Information
Annuals, mostly 100–200(–400) cm. Leaves: petioles 3–8 cm; blades ± deltate to pentagonal, 7–38 × 7–30 cm, sometimes 3- or 5-lobed, abaxial faces glabrous or soft-pubescent. Peduncles 11–27 cm. Phyllaries 14–21 in (2–)3 series, lanceolate to linear; outer 17–30 × 4–7.5 mm, apices acute, abaxial faces usually densely puberulent; inner 16–28 × 5–8 mm, apices rounded to acute, abaxial faces usually densely puberulent. Paleae 11.5–15 × 2–3 mm, mucros 2.5–5.5 mm. Ray florets 8–13; corollas usually orange, sometimes yellow, laminae oval to oblong, 20–33 × 6–17 mm. Disc florets 60–90. Cypselae 5–7. 2n = 34.
Phenology
nov (fall)
Altitude range
0–20+ m;
Distribution
MexicoWest IndiesCentral America.USA Fla.USA La.
Discussion
Tithonia rotundifolia is widely cultivated in warm climates and may persist after plantings (e.g., in Asia).
Native/Introduced
introduced;

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