Alsophila firma aka Alsophila Firma

Alsophila firma is an evergreen tree fern in the Cyatheaceae family. Its native range runs from Mexico through Central America to Ecuador. Kew places it in the wet tropical biome. The RHS lists Cyathea mexicana as a synonym. The Useful Tropical Plants account uses that older name. Its range agrees with the broader range given by Kew. The RHS gives Mexico as its plant range. It also states that this fern is not native to Britain or Ireland.

This fern has a single stem that does not branch. The stem can reach 33 feet [10 metres] tall. A crown of long fronds grows at its top. Each frond can reach about 13 feet [4 metres] long. These figures describe its potential size, not a proven garden range. The sources give no mature spread or time to maturity. Its evergreen habit means the plant retains foliage year-round. The supplied species account gives no further leaf or stem details.

In Guatemala, this fern grows in forests, on slopes, and in ravines. Records there span elevations of 656–9,186 feet [200–2,800 metres]. These records describe wild sites rather than tested garden conditions. The tropical plant database lists its status as wild. It supplies no cultivation details for the species. The evidence therefore does not establish its light or watering needs. It also gives no soil preference or frost limit. No supported hardiness zone or growth rate is available.

People sometimes collect this fern from the wild for local medicine. They use scales from its fronds to help stop bleeding. The tropical plant database assigns this use two out of five. This records a traditional use, not proof of safe treatment. The account reports no known edible uses for the plant. It also lists no other uses. The evidence does not describe a garden role or landscape use.

The same account reports no known cases of species-specific toxicity. That does not establish that the fern is safe to eat. Its caution about harmful compounds concerns ferns more broadly. Those warnings do not confirm such compounds in this species. The supplied evidence gives no species-specific pest or disease information. It also provides no details about reproductive structures.