Taxon Profile:

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Additional Resources:

Family:

Dryopteridaceae (Pteridophyta)

Primary Citation:

Brittonia 32: 116. 1980

Accepted Name:

This name is currently accepted.

Description:

by: A. Vasco, R.C. Moran, and G. Rouhan

Type: St. Helena. locality and collector not designated (holotype: W)

Description: Epiphytic, terrestrial, or saxicolous. Rhizome 1-2 mm wide, short-creeping, scaly, black, resinous; scales 2-4 mm long, lanceolate, castaneous, entire, the apex acute. Sterile leaves pinnate, 4-15 cm long, 1-2 mm apart; phyllopodia present, 0.15-0.2 cm long; petioles 2/3 the length of the sterile lamina, tan to brown; scales reduced to resinous dots or sometimes with a few scattered scales, 0.5-1 mm long, lanceolate, light brown; lamina 2-7 x 1-2.5 cm, lanceolate, papyraceous, the base ending well above the phylopodia; veins inconspicuous; hydathodes absent; lamina scales reduced to resinous dots, these often on both surfaces but more pronounced on the abaxial side. Fertile leaves similar to the sterile but smaller and with the divisions of the pinnae more shallow; petioles 1/2 the length of the fertile leaf, tan to brown; laminae 1 cm wide, lanceolate, glabrous.

Distribution: Endemic to St. Helena Island, above 650 m (elevation according to Eastwood et al., 2004b)

Comments: Elaphoglossum bifurcatum is endemic to St. Helena Island in the South Atlantic Ocean. Its pinnate laminae are unique within the ciliatum-group. The other two species endemic to St. Helena have entire margins. Elaphoglossum dimorphum has a toothed margin, but it is never pinnate; E. nervosum has simple, entire leaves.

Status: This species has been classified as vulnerable by the IUCN (Eastwood, 2004)