*Equisetum ramosissimum Desfontaines var. ramosissimum . Hab: Disturbed areas. Dist: Native of the Old World, where it is widespread in Europe, Asia, and Africa. This species was apparently introduced long ago on ship's ballast to various old ports, such as Wilmington (New Hanover County, NC), Pensacola (Escambia County, FL) and New Orleans, LA
Origin/Endemic status: Paleotropics
Other Comments: It is locally naturalized on the Wilmington waterfront, persisting in disturbed areas, such as in gravel along railroad tracks. Hauke (1979, 1984, 1992) discusses the occurrence of this species in North America. Ssp. debile (Roxburgh) Hauke occurs in se. Asia and southern Pacific Islands; it is not known to be naturalized in North America.
Synonymy: Equisetum ramosissimum Desf. var. ramosissimum – Christenhusz et al (2019); = Equisetum ramosissimum Desf. ssp. ramosissimum – FNA2, FoC; = Hippochaete ramosissima (Desf.) Farw. ssp. ramosissima; = n/a – RAB; < Equisetum ramosissimum Desf. – Fl1, K1, K3, K4, WH3