Raphanus raphanistrum subsp. maritimus (Sm.) Thell.

Perennial, rarely biennial;  taproot stout to swollen.  Rosette lvs with terminal leaflet narrower than rest of lf, and 4–8 pairs of close-set lateral leaflets;  distal leaflets much > proximal.  Petals yellow or white, rarely pink or purple or brownish, 15–20 mm long.  Silique (1)–2–6-seeded, not breaking readily into segments, (10)–20–40–(60) × (4)–6–8 mm;  constrictions short, often deep;  segments spherical or wider than long, weakly to strongly ribbed;  final segment abruptly narrowed to apex;  apex tapering, 1–2–(3)× length of final segment.  Seed c. 3 mm long.  

[From:  Webb et al. (1988) Flora of New Zealand. Volume 4.]

Flowering: (Oct.)–Dec.–Mar.–(Apr.); Fruiting: (Oct.)–Dec.–Mar.–(Apr.)