Classification
Class
Magnoliopsida Brongn.
Order
Brassicales Bromhead
Family
Cruciferae
Genus
Armoracia P.Gaertn., B.Mey & Scherb.
 Nomenclature
Scientific Name:
Armoracia rusticana Gaertn., B.Mey. & Scherb. (1800)
Synonymy:
  • = Cochlearia armoracia L. nom. illeg.
  • ≡ Nasturtium armoracia (L.) Fr.
  • ≡ Rorippa armoracia (L.) Hitchc.
  • = Armoracia lapathifolia Gilib. ex Usteri
Vernacular Name(s):
horseradish
 Description

Perennial arising from stout white fusiform roots. Stems stout, erect, grooved, branched above, to 130 cm tall. Rosette lvs elliptic to ovate to oblong, crenate or serrate; lamina (5)–10–30–(50) × 4–10–(15) cm; petiole 5–20–(50) cm long. Lower stem lvs similar in size and outline, but often deeply pinnatifid; upper stem lvs sessile, linear-lanceolate, toothed or entire, 4–12–(20) × 0.5–1–(3) cm. Panicle to 35 cm long; lateral axillary racemes to 20 cm long. Sepals 2–3 × 1–1.5 mm. Petals 4–5 ×2 mm. Silicle abortive, narrow-cylindric, 2–3 mm long.

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

 Biostatus
Exotic
 Phenology

Flowering: Nov.–Dec.

 Bibliography