Classification
 Nomenclature
Scientific Name:
Asplenium lamprophyllum Carse, Trans. & Proc. New Zealand Inst. 56: 81 (1926)
Synonymy:
Lectotype (selected by Allan 1961): Mt Wellington, Auckland, H. Carse, 30 May 1924, CHR 290558 (on three sheets)!
Etymology:
From the Greek lampro- (shining, glossy) and -phyllus (leaved), a reference to the nature of the fronds.
 Description

Terrestrial or rupestral ferns, or rarely low epiphytes. Rhizomes creeping, up to 110 mm long (in herbarium material), up to 5 mm diameter, bearing scales, stoloniferous. Rhizome scales ovate, 0.8–2.5 mm long, 0.5–1.2 mm wide, dark brown, clathrate. Fronds 210–820 mm long (rarely only 100 mm long). Stipes 60–280 mm long (rarely only 25 mm long), pale brown abaxially and proximally, green adaxially and distally, bearing ovate scales with thick cell walls throughout. Rachises green, scaly, winged in the distal half. Laminae 1–2-pinnate-pinnatifid or 2-pinnatifid, ovate or elliptic, tapering gradually to the apex, 140–590 mm long (rarely only 70 mm long), 35–240 mm wide (rarely only 22 mm wide), glossy light green on adaxial surface, dull pale green on abaxial surface, herbaceous, bearing scattered scales on both surfaces, lacking hairs. Primary pinnae in 8–25 pairs below pinnatifid apex, not or only slightly overlapping; proximal primary pinnae ovate or narrowly ovate, those at mid-lamina narrowly ovate; the longest at or below the middle, 20–150 mm long (rarely only 15 mm long), 8–40 mm wide (rarely only 6 mm wide), apices acuminate, bases more or less stalked; costae of primary pinnae winged throughout except occasionally near junction with rachis. Proximal primary pinnae divided into 1–6 pairs of secondary pinnae or lobes and a long pinnatifid apical segment, winged for most or all of the length; the basal acroscopic secondary pinna or lobe elliptic or ovate, 7–27 mm long (rarely only 4 mm), 2–14 mm wide, apices obtuse, margins incised, bases adnate or stalked in the most divided fronds. Sori nearer mid-vein than margin; indusia 2–10 mm long, curved away from midrib; free margins of indusia entire. Mean spore size 38–42 μm long, 24–29 μm wide; perispores pale and not prominently patterned.

 Recognition

Asplenium lamprophyllum is characterised by its creeping rhizomes, thick-walled scales, glossy green adaxial lamina surfaces, and characteristic smell of oil of wintergreen when crushed. It is similar to A. bulbiferum but distinguished by its creeping rhizome, thick-walled scales, glossy and less divided laminae, longer sori (2–10 mm cf. 2–4 mm long), and absence of bulbils.

The specimens at the extreme lower end of the range of variation in the description are very small fronds found at the southern margin of the species distribution (e.g. WELT P027345, CHR 553588).

Rare aberrant forms are found with much longer and more divided primary pinnae, and narrower secondary pinnae.

 Distribution

North Island: Northland, Auckland, Volcanic Plateau, Taranaki, Southern North Island.

South Island: Sounds-Nelson.

Altitudinal range: 10–600 m.

Asplenium lamprophyllum occurs in the North Island from Te Paki through Northland and Auckland to the north Taranaki coast, the western Bay of Plenty and Rotorua district, with outlying populations recorded from Wanganui, Whangaehu in Hawke’s Bay, and Wellington. It grows in coastal and lowland areas from near sea level up to 600 m in the Kaimāī Ranges. In the South Island, it is known from one collection on Arapawa Island (CHR 553588) and a poorly localised 19th century record from the Westport area (WELT P028288), not mapped here.

 Habitat

Asplenium lamprophyllum is usually a terrestrial fern, or rarely a low epiphyte, found in open podocarp and broadleaved forest, where it may carpet extensive areas over rocks and boulders, rotting logs, clay banks, and stream banks. It is found on steep slopes and well-drained soils, occurring on a variety of rock types, including lava, rhyolite, ignimbrite, and limestone.

 Biostatus
Indigenous (Endemic)
 Hybridisation

Asplenium lamprophyllum occasionally hybridises with A. bulbiferum (Brownsey 1977a).

 Cytology
 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. 1977a: Asplenium hybrids in the New Zealand flora. New Zealand Journal of Botany 15: 601–637.
Brownsey, P.J. 1977b: A taxonomic revision of the New Zealand species of Asplenium. New Zealand Journal of Botany 15(1): 39–86.
Brownsey, P.J.; Perrie, L.R. 2018: Aspleniaceae. In: Breitwieser, I.; Wilton, A.D. (ed.) Flora of New Zealand — Ferns and Lycophytes. Fascicle 18. Manaaki Whenua Press, Lincoln.
Carse, H. 1926: Botanical notes, including descriptions of new species. Transactions and Proceedings of the New Zealand Institute 56: 80–86.
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. [Not Threatened]
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. [Not Threatened]