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Lepidium davisii
Rollins
Family:
Brassicaceae
Davis' Pepperwort
FNA
Resources
Ihsan A. Al-Shehbaz, John F. Gaskin in Flora of North America (vol. 7)
Perennials;
(cespitose, caudex woody, many-branched, with persistent petiolar remains); puberulent.
Stems
simple from base, erect, unbranched or branched (few) distally, (0.2-) 0.5-1(-1.4) dm.
Basal leaves
(often deciduous); not rosulate; blade spatulate to oblanceolate, 1-2.5(-3.2) cm × 2-6(-9) mm, margins entire or apically 3(-5)-toothed or -lobed.
Cauline leaves
sessile; blade usually oblanceolate or oblong, rarely obovate, (0.8-)1.3-2.5 cm × (2-)4-7 mm, base obtuse or cuneate, not auriculate, margins entire or apically 3(-5)-toothed.
Racemes
slightly elongated in fruit; rachis puberulent, trichomes straight or curved.
Fruiting pedicels
divaricate-ascending, straight, (slender or slightly stout, terete), (2.5-)3-4.2(-5) × 0.4-0.5 mm, usually puberulent throughout, rarely glabrate.
Flowers:
sepals suborbicular to oblong-ovate, 1.2-2 × 1-1.5 mm; petals white, obovate, 2-3.2(-4) × 1.5-2 mm, claw 0.5-1 mm; stamens 6; filaments 1.7-2.3 mm, (glabrous); anthers 0.4-0.7 mm.
Fruits
suborbicular to broadly ovate, (2.5-)3-4.3(-5) × (2-)2.3-4 mm, apically winged, apical notch 0.1-0.4 mm deep; valves thin, smooth, not veined, glabrous or sparsely puberulent; style 0.5-1 mm, exserted beyond apical notch.
Seeds
oblong-ovate, (1.8-)2-2.3 × 1-1.2 mm.
2
n
= 32.
Flowering May-Jun. Playas of sagebrush plains and mesa, vernal ponds; 800-1600 m; Idaho, Nev., Oreg.
Lepidium davisii
is restricted to six counties in Idaho (Ada, Elmore, Owyhee, Twin Falls), Nevada (Elko), and Oregon (Malheur).
Open Interactive Map
Click to Display
48 Total Images
Development supported by National Science Foundation Grants (
DBI 9983132
,
BRC 0237418
,
DBI 0743827
,
DBI 0847966
)
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