Introduced from tropical Asia, Macrothelypteris torresiana is widespread in tropical America. Even in remote localities, like P. N. Las Orquideas, it can be found in disturbed areas. The collection was made in the floodplain along a large stream.
Equisetum myriochaetum
Equisetum (also known as "cola de caballo" in Mexico) has a long history of medicinal uses, although modern sources include cautions with regard to its use. Apparently, these plants have a high content of thiaminase, which may induce edema and may cause lack of limb...
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