Arabis oregana Rollins

Oregon rockcress (en)

Species

Angiosperms > Brassicales > Brassicaceae > Arabis

Characteristics

Perennials; (caudex simple or branched, with some persistent petiolar remains); sparsely to moderately pubescent, trichomes bulbous-based, simple and long-stalked, forked, (to 2 mm), these often mixed with fewer 3-rayed, stalked stellate ones. Stems simple or few from base (caudex), erect, unbranched distally, (0.6-) 1.7-4.5(-5) dm, (usually pubescent throughout, rarely subglabrate, coarsely hirsute, trichomes simple, mixed with forked ones). Basal leaves: petiole 0.5-2(-3) cm, (ciliate); blade oblanceolate to obovate, (1-)2-5(-9) cm × (5-)8-18(-22) mm, margins entire or repand to dentate, (ciliate), apex obtuse, surfaces pubescent or glabrous, trichomes simple and forked, sometimes mixed with 3-rayed stellate ones. Cauline leaves 3-6 (or 7); blade oblong, 1-3(-6) cm × 2-7(-15) mm, base not auriculate, margins entire or dentate, (ciliate or not), apex obtuse, surfaces pubescent as basal leaves or glabrous. Racemes simple, (dense). Fruiting pedicels ascending to erect, 5-10 mm, (pubescent or glabrous). Flowers: sepals (purple), oblong, (5-)6-8 × 1.5-2 mm, lateral pair saccate basally; petals purple or pink, spatulate, (10-)12-15(-16) × (3-)4-5 mm, apex obtuse; filaments (4-)5-8 mm; anthers narrowly oblong, 1.2-1.8 mm. Fruits erect or nearly so, slightly torulose, (3-)4.5-6 cm × 1.5-2 mm; valves each with prominent midvein; ovules 24-30 per ovary; style 0.5-1 mm. Seeds narrowly winged distally or not winged, oblong, 1.8-2.2 × ca. 1 mm; wing ca. 0.1 mm wide. 2n = 32.
Life form perennial
Growth form herb
Growth support -
Foliage retention evergreen
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.15 - 0.45
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 7-9
Soil humidity 1-5
Soil texture 3-6
Soil acidity -
Soil nutriment -
Hardiness (USDA) -

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 20 - 25
Germination temperacture (C°) 21
Germination luminosity light
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Arabis oregana world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:17153-2
WFO ID wfo-0000542588
COL ID G2J6
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Arabis oregana Arabis purpurascens