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heart-podded hoary cress, hoary pepperwort

globe-podded hoary cress, hairy whitetop

Habit Plants perennial, hirsute to subglabrous; rhizomatous. Plants perennial, densely hirsute; rhizomatous.
Stems

(0.8)2–6.5(9) dm.

(1)1.5–3.5(5) dm.

Basal leaves

not rosulate, obovate, spatulate, or ovate; (1.5)3–10(15) × 1–4 cm;

margins dentate or entire;

petioles 1–4 cm.

not rosulate, obovate to oblanceolate; (1)2–6(7) cm × 3–20 mm;

margins dentate;

petioles 0.5–1.5 cm.

Cauline leaves

ovate, elliptic, oblong, lanceolate, or obovate; (1)3–9(15) × (0.5)1–2(5) cm, bases sagittate-amplexicaul or auriculate;

margins dentate or entire, sessile.

oblong or lanceolate, 1–5(8) cm × (3)5–15(30) mm, bases sagittate;

margins dentate or subentire, sessile.

Inflorescences

corymbose panicles;

rachises glabrous or puberulent with straight or curved cylindrical trichomes, fruiting pedicels ascending to horizontal; terete; straight, 5–10(15) mm, glabrous or sparsely puberulent adaxially.

in corymbose panicles;

rachises pubescent with often curved trichomes, fruiting pedicels divaricate to ascending; terete; straight or slightly curved, 3–9(12) mm, pubescent all around.

Flowers

sepals caducous, 1.5–2.5 mm;

petals obovate; (2.5)3–4(4.5) × (1)1.3–2(2.2) mm, white;

stamens 6;

styles (0.6)1–1.8(2) mm.

sepals caducous, 1.4–2 mm;

petals broadly obovate; (2.2)2.8–4 × 1–3 mm, white;

claws 1–1.4 mm;

stamens 6;

styles 0.5–1.5 mm.

Fruits

indehiscent, flattened, cordate to subreniform; (2)2.5–3.7(4.3) × (3.2)3.7–5(5.6) mm;

tips obtuse to subacute; apical notch absent;

valves smooth, glabrous, reticulate-veined; wingless.

indehiscent, globose to rarely subglobose, inflated; (2)3–4.4(5) mm in diameter; apical notch absent;

valves smooth, densely puberulent, not veined; wingless.

Seeds

ovate, 1.5–2.3 × 1–1.3 mm; wingless;

cotyledons incumbent.

ovoid, 1.5–2 × 1–1.5 mm; wingless;

cotyledons incumbent.

2n

=32, 64.

=16.

Lepidium draba

Lepidium appelianum

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Disturbed areas, fields, riverbanks. Flowering Apr–Aug. 0–1700 m. BR, BW, Col, ECas, Owy, Sisk, WV. CA, ID, NV, WA; throughout North America except northern Canada and southeast US; nearly worldwide. Exotic.

Sagebrush communities, alkaline meadows, fields, pastures, roadsides, streamsides. Flowering May–Sep. 100–1700 m. BR, BW, Col, ECas, Lava, Owy, WV. CA, ID, NV, WA; southern Canada, northern and western US; Asia, South America. Exotic.

Source Flora of Oregon, volume 2, page 494
Ihsan Al-Shehbaz
Flora of Oregon, volume 2, page 492
Ihsan Al-Shehbaz
Sibling taxa
L. acutidens, L. appelianum, L. campestre, L. chalepense, L. davisii, L. densiflorum, L. dictyotum, L. didymum, L. graminifolium, L. heterophyllum, L. latifolium, L. montanum, L. nitidum, L. oblongum, L. perfoliatum, L. pinnatifidum, L. ruderale, L. sativum, L. strictum, L. virginicum
L. acutidens, L. campestre, L. chalepense, L. davisii, L. densiflorum, L. dictyotum, L. didymum, L. draba, L. graminifolium, L. heterophyllum, L. latifolium, L. montanum, L. nitidum, L. oblongum, L. perfoliatum, L. pinnatifidum, L. ruderale, L. sativum, L. strictum, L. virginicum
Synonyms Cardaria draba, Cardaria draba var. draba, Lepidium draba ssp. draba Cardaria pubescens, Cardaria pubescens var. elongata, Hymenophysa pubescens
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