Branched Horsetail on:
[Wikipedia]
[Google]
[Amazon]
''Equisetum ramosissimum'' , known as branched horsetail, is a species of evergreen horsetail (genus '' Equisetum'', subgenus ''Hippochaete''). It is not the same species as ''Equisetum ramosissimum'' , which is a 
synonym
A synonym is a word, morpheme, or phrase that means exactly or nearly the same as another word, morpheme, or phrase in a given language. For example, in the English language, the words ''begin'', ''start'', ''commence'', and ''initiate'' are all ...
of ''Equisetum giganteum
''Equisetum giganteum'', with the common name southern giant horsetail, is a species of horsetail native to South America and Central America, from central Chile east to Brazil and north to southern Mexico.
Description
It is one of the largest h ...
''.
Botanists today recognize two subspecies. The type subspecies, ''E. ramosissimum'' subsp. ''ramosissimum'', is native through much of Asia, Europe, and Africa, with an introduced population in the southeast United States. ''E. ramosissimum'' subsp.''debile'', sometimes treated as the separate species '' E. debile'', is found in southeast Asia and some Pacific islands. The type subspecies has more obvious branching from the aerial stem than subspecies ''debile''.
References
ramosissimum Flora of Malta {{fern-stub