Classification
Class
Magnoliopsida Brongn.
Order
Brassicales Bromhead
Family
Cruciferae
Genus
Pachycladon Hook.f.
 Nomenclature
Scientific Name:
Pachycladon cheesemanii Heenan & A.D.Mitch. in Heenan et al., New Zealand J. Bot. 40: 559 (2002)
Synonymy:
  • ≡ Sisymbrium novae-zelandiae Hook.f., Handb. New Zealand Fl. 11 (1864)
  • ≡ Ischnocarpus novae-zelandiae (Hook.f.) O.E.Schulz, IV 105 (Heft 86): 168-169, t. 29 (1924)
 Description

Stock rather slender with deeply descending taproot, crowned by rosette of basal lvs. Radical lvs up to 10 cm. long, us. shorter, clad in stellate hairs; narrow- to broad-spathulate, narrowed into flat petiole, subentire to bluntly pinnatifid to pinnatisect. Lower cauline lvs spathulate to linear, entire or lobed, c. 2–1 cm. long; uppermost much reduced. Stems up to 30 cm. tall, slender, stiff, sparingly branched, ± stellate-pubescent, produced into slender racemes elongating in fr. Sepals c. 1·5 mm. long, oblong, subacute to obtuse and hooded, with scattered hairs towards apex, margins hyaline. Petals white, c. 3 mm. long, narrow-spathulate, long- clawed. Siliques glab., almost straight to arcuate, ± 3–5 cm. × 1 mm.: style minute; pedicels subpatent, c. 1–1·5 cm. long. Seeds ∞, c. 0·5- 0.75 mm. long, light brown.

[From: Allan (1961) Flora of New Zealand. Volume 1 as Ischnocarpus novae-zelandiae (Hook.f.) O.E.Schulz]

 Biostatus
Indigenous (Endemic)
 Bibliography
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. [Nationally Vulnerable]
de Lange, P.J.; Norton, D.A.; Heenan, P.B.; Courtney, S.P.; Molloy, B.P.J.; Ogle, C.C.; Rance, B.D. 2004: Threatened and uncommon plants of New Zealand. New Zealand Journal of Botany 42(1): 45–76.
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. [Nationally Endangered]
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. [Nationally Vulnerable]
Heenan, P.B.; Mitchell, A.D.; Koch, M. 2002: Molecular systematics of the New Zealand Pachycladon (Brassicaceae) complex: generic circumscription and relationships to Arabidopsis sens. lat. and Arabis sens. lat. New Zealand Journal of Botany 40(4): 543–562.
Hooker, J.D. 1864: Handbook of the New Zealand Flora: a systematic description of the native plants of New Zealand and the Chatham, Kermadec's, Lord Auckland's, Campbell's and Macquarie's Islands. Part I. Reeve, London.
Schulz, O.E. 1924: Crucifierae-Sisymbieae. Das Pflanzenreich IV 105 (Heft 86): 1–388.