Asplenium obtusatum subsp. northlandicum Brownsey

New Zealand J. Bot. 15: 49, t.6 (1977) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: vulnerable (v)

Rhizome short, thick, covered with shiny purplish-brown, translucent scales tapering to long, fine points. Fronds clustered, erect, 8–60 cm long; scales at base of frond similar to those on rhizome, smaller scales scattered on rachis and midveins, particularly on ventral surface, sometimes bubble-like. Stipe fleshy, green above, brown and flat towards base, groove developing towards lamina; old stipe bases persistent. Lamina once pinnate, oblong, thick, tough and fleshy, dull green; rachis grooved with raised central rib continuing as raised midvein of terminal pinna. Pinnae shortly stalked, 4–15 pairs, oblong to ovate, mostly 15–65 mm long, sometimes lobed near base; base asymmetrically wedge-shaped, decurrent on edge or rachis; margins bluntly toothed, thickened; apex blunt to acute; midvein raised, others obscure. Sori linear-oblong, oblique to midvein, not reaching margin; indusium oblong, opening towards midrib.

EGL, GipP, VVP, WPro. Usually grows among coastal rocks within reach of salt spray, but also sheltered in coastal scrub. Mostly on granite (e.g. Phillip Is., islands near Wilsons Promontory, Rame Head and Gabo Is. in the far east), but also on basalt at Lady Julia Percy Is. in the far west.

Apparently hybridizes with A. flaccidum on Wilsons Promontory and adjacent islands (Brownsey 1983). Early reports of these putative hybrids were misidentified as A. scleroprium Hombron (which, interestingly, can only be separated from A. obtusatum A. flaccidum by its fertile spores: see Brownsey 1983). Asplenium obtusatum reportedly also hybridizes with A bulbiferum (e.g. Flinders Is.).

Created by: Andre Messina, 2016-08-04
Updated by: Daniel Ohlsen, 2016-10-14
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Distribution map

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Asplenium obtusatum subsp. northlandicum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Asplenium obtusatum subsp. northlandicum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Victorian Volcanic Plain present native
Gippsland Plain present native
East Gippsland Lowlands present native
Wilsons Promontory present native

State distribution

Distribution map
State
Western Australia
New South Wales
Australian Capital Territory
Victoria
Tasmania