Trichocoronis wrightii var. wrightii

Synonyms: Trichocoronis riparia (Greene) Greene
Treatment appears in FNA Volume 21. Treatment on page 487. Mentioned on page 488.
Revision as of 20:33, 16 December 2019 by FNA>Volume Importer

Plants sometimes colonial. Leaves mostly 10–25 mm. Involucres 1.8–2.5 mm. Corollas ca. 1 mm. Cypselae ca. 1 mm. 2n = 30.


Phenology: Flowering Feb–Jul(–Oct).
Habitat: Edges of ponds, streams, ditches, wet depressions in clay and sand, prairies, brushlands, roadsides
Elevation: 0–20 m

Discussion

The California populations of Trichocoronis wrightii have been described as “adventive” and “native to Texas.” Trichocoronis wrightii var. wigginsii R. M. King & H. Robinson is regarded as endemic to Sierra de la Giganta in Baja California Sur. It differs from var. wrightii in its taller, mostly unbranched stems, greater number of flowers per head, and less thickened carpopodial cells (King and Robinson 1970b).

Selected References

None.

Lower Taxa

None.
Guy L. Nesom +
(Torrey & A. Gray) A. Gray +
Ageratum wrightii +
Calif. +, Tex. +  and Mexico. +
0–20 m +
Edges of ponds, streams, ditches, wet depressions in clay and sand, prairies, brushlands, roadsides +
Flowering Feb–Jul(–Oct). +
Mem. Amer. Acad. Arts, n. s. +
Illustrated +
Trichocoronis riparia +
Trichocoronis wrightii var. wrightii +
Trichocoronis wrightii +
variety +