Flora of New Zealand Series

Arabis fastigiata Hook. f. Fl. N.Z. 2, 1855, 324.

Cardamine fastigiata Hook. f. Handbk N.Z. Fl. 1864, 13.

Pachycladon elongata Buchan. in T.N.Z.I. 19, 1887, 216

Notothlaspi hookeri Buchan. in T.N.Z.I. 20, 1888, 255, t. 13.

Nasturtium fastigiatum (Hook. f.) Cheesem. in T.N.Z.I. 43, 1911, 179.

Type locality: subalpine rocks, McRae's Run, Awatere River. Type: K, 37, Xmas 1853, Monro.

Stock stout up to 1·8 cm. diam. with deeply descending taproot, crowned by dense rosette of basal lvs. Radical lvs up to c. 7 cm. long, obovate-spathulate to linear-spathulate, narrowed into flat petiole, apex acute to obtuse, coarsely irregularly inciso-serrate, coriac., glab. to sparsely clad in simple long hairs. Cauline lvs smaller, narrower, upper- most subentire. Infl. of few to many simple or branched stems, forming rounded or elongate masses up to 3 dm. or more tall; fls ∞ in the racemes, pedicels slender, ascending. Sepals c. 4 mm. long, narrow- oblong; petals white, ± 6-8 mm. long, narrow-spathulate, long-clawed. Siliques 4 cm. or more long, arcuate to straight, c. 1·5-2 mm. wide; style slender, c. 1 mm. long. Seeds 1-1·5 mm. long, compressed, reddish brown.

DIST.: S. Montane to subalpine rocky places east of divide from lat. 41° 30' to 45° 30'; local in occurrences.