Class
Subclass
Order
Family
Genus
Classification
Nomenclature
Scientific Name:
Davallia tasmanii Field, Ferns New Zealand 75, t. 24, f. 5 (1890) subsp. tasmanii
Etymology:
Description
Rhizome scales bearing setae and multiseptate hairs along both margins from base to apex. False veins in ultimate lamina segments absent or faint, rarely extending halfway along length of true veins from their junction to their ending. Ultimate lamina segments bearing 1 to several sori; apices of segments usually notched or bidentate.
Recognition
Davallia tasmanii subsp. tasmanii is most easily distinguished by its rhizome scales, which bear multiseptate hairs along both margins from base to apex, whereas multiseptate hairs are confined to the apices in D. tasmanii subsp. cristata (see von Konrat et al. 1999, fig. 4).
Distribution
Three Kings Islands.
Altitudinal range: 30–220 m.
Davallia tasmanii subsp. tasmanii is endemic to the Three Kings Islands, where it is known from Great, North East, West and South West Islands (von Konrat et al. 1999).
Habitat
Davallia tasmanii subsp. tasmanii is primarily a terrestrial species found on rocky banks, rock outcrops and scree slopes in exposed coastal situations, scrambling over fallen trunks and boulders, under coastal scrub, on forest margins, or under kānuka forest. It favours drier, more open sites. Very occasionally it is also found as a low epiphyte.
Biostatus
Indigenous (Endemic)
Davallia tasmanii subsp. tasmanii was given a conservation status of Naturally Uncommon by de Lange et al. (2013).
Cytology
n = 40 (Brownlie 1961); 2n = 80 (von Konrat et al. 1999).
Images
Bibliography
Brownlie, G. 1961: Additional chromosome numbers – New Zealand ferns. Transactions of the Royal Society of New Zealand. Botany 1: 1–4.
Brownsey, P.J.; Perrie, L.R. 2018: Davalliaceae. In: Breitwieser, I.; Wilton, A.D. (ed.) Flora of New Zealand — Ferns and Lycophytes. Fascicle 22. Manaaki Whenua Press, Lincoln.
Cheeseman, T.F. 1891: Further notes on the Three Kings Islands. Transactions and Proceedings of the New Zealand Institute 23: 408–424.
de Lange, P.J.; Norton, D.A.; Courtney, S.P.; Heenan, P.B.; Barkla, J.W.; Cameron, E.K.; Hitchmough, R.; Townsend, A.J. 2009: Threatened and uncommon plants of New Zealand (2008 revision). New Zealand Journal of Botany 47: 61–96. [Naturally uncommon]
de Lange, P.J.; Rolfe, J.R.; Barkla J.W.; Courtney, S.P.; Champion, P.D.; Perrie, L.R.; Beadel, S.N.; Ford, K.A.; Breitwieser, I.; Schönberger, I.; Hindmarsh-Walls, R.; Heenan, P.B.; Ladley, K. 2018: Conservation status of New Zealand indigenous vascular plants, 2017. New Zealand Threat Classification Series. No. 22. [Naturally Uncommon]
de Lange, P.J.; Rolfe, J.R.; Champion, P.D.; Courtney, S.P.; Heenan, P.B.; Barkla, J.W.; Cameron, E.K.; Norton, D.A.; Hitchmough, R.A. 2013: Conservation status of New Zealand indigenous vascular plants, 2012. New Zealand Threat Classification Series 3. Department of Conservation, Wellington. [Naturally Uncommon]
Field, H.C. 1890: The ferns of New Zealand. A.D. Willis, Wanganui.
von Konrat, M. J.; Braggins, J. E.; de Lange, P. J. 1999: Davallia (Pteridophyta) in New Zealand, including description of a new subspecies of D. tasmanii. New Zealand Journal of Botany 37: 579–593.
