''For'' Alsophila christii ''and'' Cyathea christii ''(Sodiro) Domin, see'' Lophosoria quadripinnata''.'' ''Alsophila hermannii'',

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 ...

''Cyathea christii'' Copel., is a species of

tree fern The tree ferns are arborescent (tree-like) ferns that grow with a trunk elevating the fronds above ground level, making them trees. Many extant tree ferns are members of the order Cyatheales, to which belong the families Cyatheaceae (scaly tree ...

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

Mindanao Mindanao ( ) ( Jawi: مينداناو) is the second-largest island in the Philippines, after Luzon, and seventh-most populous island in the world. Located in the southern region of the archipelago, the island is part of an island group of ...

in the

Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

, where it grows in forest at an altitude of 900–1800 m. The trunk is erect and may be 5 m tall or more. Fronds are

bi- Numeral or number prefixes are prefixes derived from numerals or occasionally other numbers. In English and many other languages, they are used to coin numerous series of words. For example: * unicycle, bicycle, tricycle (1-cycle, 2-cycle, 3-cy ...

tripinnate Pinnation (also called pennation) is the arrangement of feather-like or multi-divided features arising from both sides of a common axis. Pinnation occurs in biological morphology, in crystals, such as some forms of ice or metal crystals, and in ...

and 2–3 m long. The stipe is covered with some warts and narrow, brown

scale Scale or scales may refer to: Mathematics * Scale (descriptive set theory), an object defined on a set of points * Scale (ratio), the ratio of a linear dimension of a model to the corresponding dimension of the original * Scale factor, a number ...

s. Sori occur near the midvein of fertile pinnules and are covered by thin, fragile

indusia A sorus (pl. sori) is a cluster of sporangia (structures producing and containing spores) in ferns and fungi. A coenosorus (plural coenosori) is a compound sorus composed of multiple, fused sori. Etymology This New Latin word is from Ancient Gr ...

Taxonomy

The species was first described by

Edwin Copeland Edwin Bingham Copeland (September 30, 1873 – March 16, 1964) was an American botanist and agriculturist. He is known for founding the University of the Philippines College of Agriculture at Los Baños, Laguna and for being one of the America's ...

in 1906 as ''Cyathea christii''. In 1970, Rolla Tryon transferred it to the genus '' Alsophila'', but as the name ''Alsophila christii'' had already been used by

Luis Sodiro Luis Sodiro (1836–1909) was a Jesuit priest and a field botanist who described a large number of species from the area around Quito, Ecuador Ecuador ( ; ; Quechua: ''Ikwayur''; Shuar: ''Ecuador'' or ''Ekuatur''), officially the Repub ...

in 1908, Tryon published the

replacement name In biological nomenclature, a ''nomen novum'' (Latin for "new name"), new replacement name (or replacement name, new substitute name, substitute name) is a scientific name that is created specifically to replace another scientific name, but only w ...

''Alsophila hermannii''. , the transfer is accepted by World Ferns. ''Alsophila christii'' Sodiro is now regarded as a synonym of '' Lophosoria quadripinnata''. ''Cyathea christii'' (Sodiro) Domin is a synonym of ''Alsophila christii'', so also of ''Lophosoria quadripinnata'' and not of this species. ,

Plants of the World Online Plants of the World Online (POWO) is an online database published by the Royal Botanic Gardens, Kew. It was launched in March 2017 with the ultimate aim being "to enable users to access information on all the world's known seed-bearing plants by ...

does not accept the transfer to ''Alsophila'', accepting the name ''Cyathea christii'' Copel.

References

hermannii Ferns of Asia Endemic flora of the Philippines Flora of Mindanao Plants described in 1906 {{alsophila-plant-stub