Cyathea delgadii

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Cyathea delgadii

Scientific classification

Kingdom:	Plantae
Division:	Pteridophyta
Order:	Cyatheales
Family:	Cyatheaceae
Genus:	Cyathea
Subgenus:	Cyathea
Section:	Cyathea
Species:	C. delgadii

Binomial name

Cyathea delgadii
Pohl ex Sternberg, 1820 (republ. 1829)

Synonyms

Cyathea vestita Martius, 1822
Cyathea hirtula Martius, 1834
Cyathea oligocarpa Kunze, 1834
Cyathea schanschin Martius, 1834
Cyathea denticulata J. G. Goldmann in Meyen, 1843 (non Alsophila denticulata Baker, 1885; quae Cyathea hancockii)
Cyathea abruptecaudata Fée, 1869
Cyathea feei Glaziou in Fée, 1869
Cyathea sphaerocarpa Fée, 1869
Cyathea pilosa Baker, 1874
Cyathea copelandii Kuhn & Luerssen in Copeland, 1882
Cyathea hypotricha Christ, 1904
Cyathea bahiensis Rosenstock, 1924
Cyathea micromera Rosenstock, 1924
Cyathea trindadensis Brade, 1936
Cyathea trinidadensis (Brade) J. E. Braggins & M. F. Large orth. var., 2004

Cyathea delgadii is a widespread species of tree fern native to Costa Rica, Panama, Venezuela, French Guiana, Guyana, Trinidad, Colombia, Ecuador, Peru, Bolivia, Argentina, Paraguay, and Brazil. It grows in tropical and submontane rain forest, forest understory, in open locations, and along paths, at an elevation of 100 m and above (up to 2700 m in Peru). The trunk of this plant is erect, 1.5-10 m tall and 5-15 cm in diameter. Fronds are bipinnate and 1.5-3 m in length. The crown is large and slightly arching. Petioles are yellow-brown to dark brown in colouration and bear spines. Small brown scales cover the rachis, which is also brown. Sori are borne on each side of the pinnule midvein and are protected by globose indusia.

C. delgadii forms part of a large complex centered on Cyathea fulva.

In Costa Rica, C. delgadii is present in the Cordillera de Guanacaste, Cordillera de Tilarán, north slope of the Cordillera Central, the Norte region, Caribbean side of the Cordillera de Talamanca, Fila Costeña, and the Osa Peninsula, where it has an altitudinal distribution of 500-1500 m (Alexander Rojas A., 1999).

Since it is abundant where it does grow and has such a large natural range, the conservation status of C. delgadii can be equated with the IUCN category "Lower risk" (Alexander Rojas A., 1999).

To do well in cultivation, plants should be provided with consistent moisture and well-drained humus as a substrate. This species does best when sheltered from the wind and grown in a warm area.

The specific epithet delgadii refers to Gancho do General Delgado, along the road to Caldas Novas, Brazil, where the type material was collected.

The roots of this species are used for the culture of orchids and the manufacture of crafts. C. delgadii may grow on disturbed land and, since it is often harvested from these areas, its use does not have as great an impact on the forest as it would otherwise.