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Armoracia rusticana P. Gaertn., B. Mey. &. Scherb.
Armoracia lapathifolia Gilib nom inval; Cochlearia armoracia L; Horseradish

Life   Plantae   Dicotyledoneae   Brassicaceae   Armoracia

Armoracia rusticana
© Copyright Malcolm Storey 2011-2118 · 3
Armoracia rusticana

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  • Flora of North America

Associates · map
FamilyScientific name @ source (records)
Albuginaceae  Albugo candida @ BPI (28)
Aphididae  Aphis ( @ CSUC_TCN (2)
Cercopidae  Philaenus spumarius @ AMNH_IZC (1)
Erysiphaceae  Oidium fusisporioides @ BPI (1)
Mycosphaerellaceae  Cercospora armoraciae @ BPI (11)

Mycosphaerella armoraciae @ BPI (2)

Ramularia armoraciae @ BPI (22)
Pentatomidae  Murgantia histrionica @ UDCC_TCN (5)
Pleosporaceae  Alternaria armoraciae @ BPI (1)

Alternaria brassicae @ BPI (9)

Alternaria herculea @ BPI (3)

Alternaria @ BPI (1)

Macrosporium herculeum @ BPI (8)
_  Ascochyta armoraciae @ BPI (4)

Ascochyta rusticana @ BPI (2)

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FNA | Family List | FNA Vol. 7 | Brassicaceae | Armoracia

1. Armoracia rusticana P. Gaertner, B. Meyer & Scherbius, Oekon. Fl. Wetterau. 2: 426. 1800.

Cochlearia armoracia Linnaeus; Rorippa armoracia (Linnaeus) A. S. Hitchcock

Roots fusiform or cylindrical, fleshy or woody. Stems 5-12 (-20) dm. Basal leaves: petiole to 60 cm (broadly expanded basally); blade broadly oblong, oblong-lanceolate, or ovate, (10-)20-45(-60) cm × (30-)50-120(-170) mm, margins usually coarsely crenate, rarely pinnatifid. Cauline leaves: proximal shortly petiolate, blade oblong to linear-oblong (lobed), smaller than basal, margins pinnatifid or pinnatisect; distal sessile or shortly petiolate, blade linear to linear-lanceolate, base cuneate or attenuate, margins usually serrate or crenate, rarely entire. Racemes to 40 cm. Fruiting pedicels ascending, 8-20 mm. Flowers: sepals 2-4 mm; petals obovate or oblanceolate, 5-7 (-8) mm, claw to 1.5 mm; filaments 1-2.5 mm; anthers 0.5-0.8 mm. Fruits (rarely produced), 4-6 mm; style obsolete or to 0.5 mm; stigma well-developed. Seeds compressed (often not produced, rarely to 4 per locule). 2 n = 32.

Flowering Mar-Jul. Fields, moist stream banks, roadsides, ditches, disturbed sites, open woods, along railroads, shallow ponds, marshes, waste places; 0-1100 m; introduced; B.C., Man., N.B., N.S., Ont., P.E.I., Que., Sask.; Calif., Colo., Conn., Idaho, Ill., Ind., Iowa, Maine, Mass., Mich., Minn., Mo., Mont., Nebr., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Oreg., Pa., R.I., S.Dak., Tenn., Utah, Vt., Va., Wash., W.Va., Wis., Wyo.; Europe; Asia; introduced also nearly worldwide.

Armoracia rusticana has been widely cultivated for about 2000 years for its fleshy roots that are grated to produce the pungent horseradish sauce. The plant is also a noxious weed that is very difficult to eradicate, even tiny root fragments are capable of regenerating new plants.

Updated: 2024-07-17 13:21:39 gmt
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