Burke: Lepidium draba vs. Lepidium oblongum

	Lepidium draba	Lepidium oblongum
	heart-podded hoarycress, hoary pepperwort	Lepidium oblongum
Habit	Herbaceous perennial from strong rhizomes, the stems erect to decumbent, 2-5 dm. tall, puberulent to hoary-pubescent.
Leaves	Leaves alternate, ovate-oblong to oblong-oblanceolate, denticulate to dentate, 4-10 cm. long, the lower ones petiolate, the upper sessile and sagittate-clasping.
Flowers	Inflorescence of bractless, dense, numerous, rather flat-topped racemes; pedicles slender, 1 cm. long; sepals 4, 2 mm. long, early-deciduous; petals 4, white, 3-4 mm. long; stamens 6; style slender, 1 mm. long
Fruit	Silicles inflated, cordate-ovoid, cordate at the base and rounded or slightly notched at the tip, 3-5 mm. long and 4-6 mm. broad, glabrous; seeds 1 per cell, 2 mm. long.

	Lepidium draba	Lepidium oblongum
Identification notes	Separated from Cardaria pubescens by the glabrous silicle.
Flowering time	April-August	May-July
Habitat	Roadsides, fields, sagebrush desert, wastelots, and disturbed areas at low to middle elevations.	Roadsides and wastelots.
Distribution	Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]	Occurring west of the Cascades crest in northwestern Washington, where possibly not fully naturalized; northwestern Washington and southwestern Oregon; native to the southern U.S. and Central America. [WildflowerSearch map] [BONAP county map]
Origin	Introduced from Eurasia	Introduced from the southern U.S. and Central America
Conservation status	Not of concern	Not of concern
Sibling taxa	L. appelianum, L. campestre, L. chalepense, L. densiflorum, L. dictyotum, L. didymum, L. heterophyllum, L. latifolium, L. nitidum, L. oblongum, L. oxycarpum, L. perfoliatum, L. ramosissimum, L. sativum, L. strictum, L. virginicum	L. appelianum, L. campestre, L. chalepense, L. densiflorum, L. dictyotum, L. didymum, L. draba, L. heterophyllum, L. latifolium, L. nitidum, L. oxycarpum, L. perfoliatum, L. ramosissimum, L. sativum, L. strictum, L. virginicum
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Lepidium oblongum

heart-podded hoarycress, hoary pepperwort

Lepidium oblongum

Habit

Herbaceous perennial from strong rhizomes, the stems erect to decumbent, 2-5 dm. tall, puberulent to hoary-pubescent.

Leaves

Leaves alternate, ovate-oblong to oblong-oblanceolate, denticulate to dentate, 4-10 cm. long, the lower ones petiolate, the upper sessile and sagittate-clasping.

Flowers

Inflorescence of bractless, dense, numerous, rather flat-topped racemes; pedicles slender, 1 cm. long;

sepals 4, 2 mm. long, early-deciduous;

petals 4, white, 3-4 mm. long;

stamens 6;

style slender, 1 mm. long

Fruit

Silicles inflated, cordate-ovoid, cordate at the base and rounded or slightly notched at the tip, 3-5 mm. long and 4-6 mm. broad, glabrous;

seeds 1 per cell, 2 mm. long.

Lepidium oblongum

Identification notes

Separated from Cardaria pubescens by the glabrous silicle.

Flowering time

April-August

May-July

Habitat

Roadsides, fields, sagebrush desert, wastelots, and disturbed areas at low to middle elevations.

Roadsides and wastelots.

Distribution

Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.

[WildflowerSearch map]

[BONAP county map]

Occurring west of the Cascades crest in northwestern Washington, where possibly not fully naturalized; northwestern Washington and southwestern Oregon; native to the southern U.S. and Central America.

[WildflowerSearch map]

[BONAP county map]

Origin

Introduced from Eurasia

Introduced from the southern U.S. and Central America

Conservation status

Not of concern

Sibling taxa