Pseudogynoxys chenopodioides

(Kunth) Cabrera

Brittonia 7: 56. 1950.

IntroducedIllustrated
Basionym: Senecio chenopodioides Kunth in A. von Humboldt et al., Nov. Gen. Sp. 4(fol.): 140. 1818; 4(qto.): 179. 1820
Synonyms: Senecio confusus Britten
Treatment appears in FNA Volume 20. Treatment on page 608.

Leaves: petioles mostly 1–3 cm; blades mostly 2–8 (–12) × 1–5 (–7) cm, bases broadly cuneate to truncate or rounded, apices acuminate to attenuate. Peduncles mostly 3–8+ cm. Calyculi of lance-deltate to filiform bractlets 2–10 mm. Involucres 8–12 × 12–20 (–25+) mm. Phyllaries puberulent (hairs crinkled), glabrescent. Ray corollas: laminae 12–20+ mm. Disc corollas 8–12 mm, lobes 1.5–2.5+ mm. Cypselae (2–) 4 mm; pappi 3–8+ mm.


Phenology: Flowering year round, mostly winter.
Habitat: Disturbed sites, waste grounds
Elevation: 0–100 m

Distribution

V20-1364-distribution-map.gif

Introduced; Fla., Mexico, West Indies, Central America

Discussion

Pseudogynoxys chenopodioides is widely cultivated as an ornamental. In Florida, it persists after cultivation; it may be encountered elsewhere along the Gulf Coast (a report from southern Texas has not been confirmed).

Selected References

None.

Lower Taxa

None.
not tailed +, rounded +  and obtuse +
papillate +
acuminate;attenuate +
scarious +
usually ovate +  and lance-linear +
lance-attenuate +
indeterminate +  and determinate +
Theodore M. Barkley† +
(Kunth) Cabrera +
broadly cuneate +  and truncate or rounded +
Senecio chenopodioides +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
ovate;lanceolate +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
winged;nerved;ribbed +
lance-deltate;filiform +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
orange +  and more or less brick-red +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
cylindric +
fertile +  and bisexual +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
fertile +  and bisexual +
Fla. +, Mexico +, West Indies +  and Central America +
0–100 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Disturbed sites, waste grounds +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
campanulate;turbinate or cylindric +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
erect;reflexed +
lanceovate +  and lance-linear +
dentate to pinnatifid +  and entire +
dentate +  and denticulate +
membranous +
2-carpellate +
persistent +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering year round, mostly winter. +
lance-linear +  and linear +
glabrescent +  and puberulent +
bearing subulate enations +, hairy +  and bristly +
conic;usually flat;convex +
exalbuminous +
Introduced +  and Illustrated +
climbing +  and twining +
prostrate +  and ascending +
appendaged +  and truncate +
papillate +
Senecio confusus +
Pseudogynoxys chenopodioides +
Pseudogynoxys +
species +
campanulate +
perennial +  and annual +