*Equisetum ramosissimum Desfontaines var. ramosissimum . Branched Scouring-Rush. Phen: Jun-Aug. 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. 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.
Origin/Endemic status: Paleotropics
Taxonomy Comments: Ssp. debile (Roxburgh) Hauke occurs in se. Asia and southern Pacific Islands; it is not known to be naturalized in North America.
Synonymy: = Christenhusz et al (2019); = Equisetum ramosissimum Desf. ssp. ramosissimum – FNA2, Lin et al (2013); = Hippochaete ramosissima (Desf.) Farw. ssp. ramosissima; = n/a – RAB; < Equisetum ramosissimum Desf. – Fl1, K1, K3, K4, WH3
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