Abutilon trisulcatum

(Jacquin) Urban

Repert. Spec. Nov. Regni Veg. 16: 32. 1919

Basionyms: Sida trisulcata Jacquin
Synonyms: Abutilon nealleyi J. M. Coulter A. ramosissimum C. Presl A. triquetrum Sweet
Treatment appears in FNA Volume 6. Treatment on page 227. Mentioned on page 220, 221.
Herbs, annual, sometimes perennial, or subshrubs, 1–2.5 m. Stems erect, prominently 3-sulcate when young, minutely puberulent, usually viscid (especially in inflorescence). Leaves: stipules subulate, 2–4 mm; petiole usually shorter than blade; blade slightly discolorous, ovate, 6–11 cm, longer than wide, base cordate, margins crenulate-serrulate, apex acuminate, surfaces tomentulose, obscured by pubescence. Inflorescences terminal, open panicles. Flowers: calyx 3–4 mm, lobes not overlapping, erect in fruit, lanceolate-ovate; corolla sometimes reflexed, yellow, often with dark red center, petals 4–6 mm; staminal column glabrous; style 5-branched. Schizocarps subcylindric, usually medially constricted, 6–8 × 5–8 mm; mericarps: apex apiculate, minutely puberulent. Seeds 3 per mericarp, 2 mm, minutely pubescent. 2n = 14.

Phenology: Flowering winter–spring.
Habitat: Dry shrublands, disturbed vegetation, roadsides
Elevation: 0–300 m

Distribution

V6 404-distribution-map.jpg

Tex., Mexico, West Indies, Central America.

Discussion

Abutilon trisulcatum occurs from Texas to Nicaragua and in the West Indies. It is a common roadside weed in most of Mexico, and has been found in southern Texas in Cameron and Hidalgo counties.

References

None.

Lower Taxa

No lower taxa listed.