Tithonia diversifolia
Tithonia rotundifolia
Mexican sunflower weed, tree marigold
clavel de muerto
petioles 2–6 cm;
blades ± deltate to pentagonal, 7–33 × 7–22 cm, sometimes 3- or 5-lobed, abaxial faces glabrous to hispid-pilose.
petioles 3–8 cm;
blades ± deltate to pentagonal, 7–38 × 7–30 cm, sometimes 3- or 5-lobed, abaxial faces glabrous or soft-pubescent.
7–24 cm.
11–27 cm.
7–14;
corollas yellow, laminae linear, 48–69 × 9–16 mm.
8–13;
corollas usually orange, sometimes yellow, laminae oval to oblong, 20–33 × 6–17 mm.
80–120+.
60–90.
16–28 in (3–)4 series, oblong to ovate;
outer 6–10 × 4–7 mm, apices rounded to acute, abaxial faces usually glabrous;
inner 10–20 × 3–10 mm, apices rounded to acute, abaxial faces glabrous.
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.
4–6 mm.
5–7.
10–13 × 2–3 mm, mucros 1.5–2.5 mm.
11.5–15 × 2–3 mm, mucros 2.5–5.5 mm.
= 34.
= 34.
Tithonia diversifolia
Tithonia rotundifolia
Tithonia diversifolia is widely cultivated in warm climates and may persist after plantings; a report for Louisiana was not confirmed for this treatment.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Tithonia rotundifolia is widely cultivated in warm climates and may persist after plantings (e.g., in Asia).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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