Current Threat Status
2012 - Not Threatened
Previous Threat Status
2009 - Not Threatened
2004 - Not Threatened
Caladenia nothofageti D.L.Jones, Molloy et M.A.Clem.
Vascular - Native
Petalochilus nothofageti (D.L.Jones, Molloy et M.A.Clem.) D.L.Jones et M.A.Clem.
Endemic. North and South Islands. In the North present from about Lake Taupo south.
Lowland to montane (up to 1000 m a.s.l). Virtually confined to beech (Nothofagus Blume) forest where it favours well-lighted sites relatively free from other taller plants. Often found on banks or lining track sides. Sometimes found around the margins of seepages.
Solitary, hirsute, terrestrial, tuberous herb. Leaf semi-erect, 40-180 x 1-3 mm, bright green, narrowly linear, sparsely glandular pubescent. Flowering scape, slender, wiry, 50-100 mm tall, green, glandular-pubescent. Sterile bracts closely sheathing, 8-10 x 2-3 mm, oblong-lanceolate, obtuse to acute, externally glandular-pubescent; fertile bracts closely sheathing, 5.0-7.0 x 2.0-2.5 mm, lanceolate, externally glandular pubescent. Ovary, 6-8 mm long, narrowly ellipsoid, green, glandular-pubescent. Flower unscented, usually solitary, 14-16 mm diameter, externally greenish-white, internally white. Tepals externally sparsely glandular; dorsal sepal erect and slightly incurved; lateral sepals porrect to obliquely decurved, slightly divergent; petals spreading to drooping. Dorsal sepal 8.0-9.5 x 2.0-3.0 mm, narrowly obovate, obtuse. Lateral sepals 8.0-9.5 x 2.3 mm, narrowly oblanceolate, slightly falcate, obtuse. Petals 8.0-9.0 x 2.2 mm, falcate, subacute. Labellum white (very rarely with faint pink transverse bars), articulated on a short 0.3 x 0.7 mm claw, trilobed. Lamina transversely ovate in outline when flattened, 5.5-6.5 x 5.0-5.5 mm, erect in proximal third, porrect to decurved in distal two-thirds, apex decurved; lateral lobes 2.3 mm wide, erect and column-embracing, entire; mid-lobe 3 mm long, oblong-tapered; margins cream to pale yellow, with 4-6 pairs of flat marginal calli to 0.8 mm long, these decrescent and irregular towards apex. Lamina calli pale yellow, in 2 rows extending onto the base of the mid-lobe. Basal calli 2-4, stipitate; head ovoid or bifurcate, c.0.6 mm diameter, papillate. Longest lamina calli 1 mm long, stipitate; head 0.2 mm diameter, papillate. Column 5.5-6.0 x 2.5 mm, green, shallowly incurved, narrowly winged; central anterior ridge c.1 mm wide. Anther c.1.3 x 1.3 mm, cream, papillate, with a short rostrum. Pollinia 4, 1 mm long, flat, white, mealy, incoherent. Stigma semi-circular, 1 mm diameter sunken. Capsule erect 10.2-12.0 mm long, ovoid to ovoid-ellipsoid, green often with purple stripes
Closest to Caladenia chlorostyla from which it differs by its mostly solitary, white flowers or greenish-white flowers. The labellum is usually uniformly white but on rare occasions it can be transversely faintly pink-barred. This species is very close to P. minor and is regarded by many as simply a colour-variant of it.
November - January
Main Flower Colour
Other Flower Colour
January - April
Difficult - should not be removed from the wild.
Where To Buy
Not commercially available
Jones et al. (2001) revived the genus Petalochilus R.S.Rogers (erected by Rogers (1924) for what has come to be viewed as a peloric state of Caladenia R.Br. - see Moore & Edgar (1970)) for a distinct clade of mostly New Zealand orchids that had usually been referred to as Caladenia. Subsequently Hopper et al. (2004) showed how the reorganisation of Caladenia by Jones et al. (2001) was unworkable and they recommended a return to Caladenia and the other allied Australian genera that had been recognised previously. Following discussion with S. Hopper and P. Weston (pers. comm., 2011, 2014) the treatment of Hopper et al. (2004) is preferred to that of Jones et al. (2001) and so followed here.
References and further reading
Hopper, S.D.; Brown, A.P. 2004: Robert Brown's Caladenia revisited, including a revision of its sister genera Cyanicula, Ericksonella and Pheladenia (Caladeniinae: Orchidaceae). Australian Systematic Botany 17: 1-240.
Jones, D.L.; Molloy, B.P.J.; Clements, M.A. 1997: Three new species and a new combination in Caladenia R.Br. (Orchidaceae) from New Zealand. The Orchadian 12: 221-229.
Jones, D.L.; Clements, M.A.; Sharma, I.K.; Mackenzie, A.M. 2001: A New Classification of Caladenia R.Br. (Orchidaceae). The Orchadian 13: 389-419.
Moore, L.B.; Edgar, E. 1970: Flora of New Zealand. Vol. II. Government Printer, Wellington.
Rogers, R.S. 1924: Petalochilus: a New Genus of New Zealand Orchids. Journal of Botany 62: 65-67.
This page last updated on 3 Dec 2014