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Lepidium densiflorum Schrad.
Life   Plantae   Dicotyledoneae   Brassicaceae   Lepidium

Lepidium densiflorum
© Copyright Mel Harte 2010 · 3
Lepidium densiflorum

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Lepidium densiflorum
© Copyright Mel Harte 2010 · 3
Lepidium densiflorum
Lepidium densiflorum
© Copyright Mel Harte 2010 · 3
Lepidium densiflorum

Lepidium densiflorum
© Copyright Mel Harte 2010 · 3
Lepidium densiflorum
Lepidium densiflorum
© Copyright Mel Harte 2010 · 3
Lepidium densiflorum

Lepidium densiflorum
© Copyright Mel Harte 2010 · 3
Lepidium densiflorum
Lepidium densiflorum
© Copyright Mel Harte 2010 · 3
Lepidium densiflorum

Lepidium densiflorum
© Copyright Mel Harte 2010 · 3
Lepidium densiflorum

Associates · map
FamilyScientific name @ source (records)
Albuginaceae  Albugo candida @ BPI (6)

Albugo cruciferarum @ BPI (1)
Mycosphaerellaceae  Septoria lepidii @ 789059B (1)

Septoria lepidiicola @ BPI (1)
Peronosporaceae  Peronospora lepidii @ 789059A (1)

Peronospora parasitica @ BPI (2)
Pucciniaceae  Puccinia subnitens @ BPI (3)

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Lepidium densiflorum Schrad.
common pepperweed

Image of Lepidium densiflorum

General Information
Symbol: LEDE
Group: Dicot
Family: Brassicaceae
Duration: Annual
Growth Habit : Forb/herb
Native Status : AK   I?
HI   I
L48   I,N
Data Source and Documentation
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Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   


click on a thumbnail to view an image, or see all the Lepidium thumbnails at the Plants Gallery

Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory . United States, NM. Usage Requirements .

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 2: 166. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . Usage Requirements .



Symbol Scientific Name
LEDED Lepidium densiflorum Schrad. var. densiflorum
LEDEE Lepidium densiflorum Schrad. var. elongatum (Rydb.) Thell.
LEDEM Lepidium densiflorum Schrad. var. macrocarpum G. Mulligan
LEDEP Lepidium densiflorum Schrad. var. pubecarpum (A. Nelson) Thell.
LEDER Lepidium densiflorum Schrad. var. ramosum (A. Nelson) Thell.
LEDET Lepidium densiflorum Schrad. var. typicum Thell.
LEEL4 Lepidium elongatum Rydb.
LENE7 Lepidium neglectum Thell.
LEPU6 Lepidium pubecarpum A. Nelson
LERA6 Lepidium ramosum A. Nelson
LETE7 Lepidium texanum Buckley


Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Dilleniidae
Order Capparales
Family Brassicaceae ⁄ Cruciferae – Mustard family
Genus Lepidium L. – pepperweed
Species Lepidium densiflorum Schrad. – common pepperweed

Subordinate Taxa

This plant has no children

Legal Status

U.S. Weed Information
Lepidium densiflorum common pepperweed greenflower pepperweed peppergrass This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of Weeds of the U.S.
NE&GP Stubbendieck, J., G.Y. Friisoe,and M.R. Bolick. 1994. Weeds of Nebraska and the Great Plains . Nebraska Department of Agriculture, Bureau of Plant Industry. Lincoln, Nebraska.

Wetland Status

Interpreting Wetland Status

Top Level Regions
Hawaii UPL
North America
Alaska FACU
Arid West UPL
Atlantic and Gulf Coastal Plain FACU
Eastern Mountains and Piedmont FAC
Great Plains FAC
Midwest FAC
Northcentral & Northeast FACU
Western Mountains, Valleys, and Coast FACU

Related Links

More Accounts and Images
ARS Germplasm Resources Information Network (LEDE)
CalPhotos (LEDE)
Integrated Taxonomic Information System (LEDE)
Integrated Taxonomic Information System (LEDED)
Integrated Taxonomic Information System (LEDEE)
Integrated Taxonomic Information System (LEDEM)
Integrated Taxonomic Information System (LEDEP)
Integrated Taxonomic Information System (LEDER)
Integrated Taxonomic Information System (LEDET)
Integrated Taxonomic Information System (LEEL4)
Integrated Taxonomic Information System (LENE7)
Integrated Taxonomic Information System (LEPU6)
Integrated Taxonomic Information System (LERA6)
Integrated Taxonomic Information System (LETE7)
Jepson Interchange (University of California - Berkeley) (LEDE)
Lady Bird Johnson Wildflower Center Native Plant Information Network (LEDE)
Native American Ethnobotany (University of Michigan - Dearborn) (LEDE)
USF Atlas of Florida Vascular Plants (LEDE)
University of Tennessee Herbarium (Distribution) (LEDE)
University of Wisconsin - Stevens Point Freckmann Herbarium (LEDE)
Related Websites
http://www.pnwherbaria.org (LEDE)



Source Large Mammals Small Mammals Water Birds Terrestrial Birds


Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover

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Following modified from Flora of North America
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FNA Vol. 7 Page 574, 578 , 579 , 580, 590, 591, 594, 595 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 7 | Brassicaceae | Lepidium

11. Lepidium densiflorum Schrader, Index Seminum (Göttingen). 1832: 4. 1832.

Lepidium densiflorum var. elongatum (Rydberg) Thellung; L. densiflorum var. macrocarpum G. A. Mulligan; L. densiflorum var. pubicarpum (A. Nelson) Thellung; L. densiflorum var. ramosum (A. Nelson) Thellung; L. elongatum Rydberg; L. neglectum Thellung; L. pubicarpum A. Nelson; L. ramosum A. Nelson

Annuals or biennials; puberulent or glabrous, (trichomes cylindrical). Stems simple from base, erect, branched distally, (1-)2.5-5(-6.5) dm. Basal leaves (early withered); rosulate; petiole 0.5-1.5(-2) cm; blade oblanceolate, spatulate, or oblong, (1.5-)2.5-8(-11) cm × 5-10(-20) mm, margins coarsely serrate or pinnatifid. Cauline leaves shortly petiolate; blade narrowly oblanceolate or linear, (0.7-)1.3-6.2(-8) cm × (0.5-)1.5-10 (-18) mm, base attenuate to cuneate, not auriculate, margins usually entire or irregularly serrate to dentate, rarely pinnatifid. Racemes considerably elongated in fruit; rachis puberulent, trichomes straight, slender to subclavate. Fruiting pedicels divaricate-ascending to horizontal, straight or slightly recurved, (terete), (1.5-)2-3.5(-4) × 0.15-0.25 mm, puberulent adaxially. Flowers: sepals oblong, 0.5-0.8(-1) × 0.3-0.5 mm; petals (absent or rudimentary) white, filiform, 0.3-0.9 mm, claw absent; stamens 2, median; filaments 0.6-1(-1.8) mm; anthers 0.1-0.2 mm. Fruits obovate to obovate-suborbicular, (2-)2.5-3(-3.5) × 1.5-2.5(-3) mm (widest beyond middle), apically winged, apical notch 0.2-0.4 mm deep; valves thin, smooth, not veined, glabrous or sparsely puberulent (at least on margin); style 0.1-0.2 mm, included in apical notch. Seeds ovate, 1.1-1.3 (-1.5) × 0.8-0.9 mm. 2 n = 32.

Flowering May-Jul. Waste places, disturbed sites, prairies, fields, pastures, grasslands, chaparral, meadows, sagebrush flats, flood plains, gravelly hillsides, rock crevices, seashores, sandy places, shaley barrens, open mesa, roadsides; 0-3500 m; Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon; Ala., Alaska, Ariz., Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo.; Mexico (Chihuahua, Nuevo León); introduced in Europe, Asia.

North American records of Lepidium apetalum Willdenow mostly represent misidentifications of L. densiflorum . The latter has obovate fruits widest beyond the middle, whereas L. apetalum has elliptic fruits widest at the middle.

The number and limits of the varieties recognized in Lepidium densiflorum , as well as the characters used to delimit them, vary among authors (A. Thellung 1906; C. L. Hitchcock 1936; G. A. Mulligan 1961; R. C. Rollins 1993; N. H. Holmgren 2005b). The variation almost always does not correlate with geography, and the recognition of varieties in this species is neither practical nor very useful. All of those authors admitted that these varieties are "very weak at best" (Rollins, p. 554). Of them, perhaps var. pubicarpum (including var. elongatum ) might merit recognition. It is distributed in almost all of the Mountain and Pacific states and is distinguished from the other varieties solely by the presence of trichomes or minute papillae on the fruit valves. The density of these trichomes ranges from moderate and covering the entire valve surface to very sparse and represented by individual papillate trichomes restricted to the valve margin. Furthermore, the length of these trichomes may vary from ca. 0.01 to 0.3 mm. In some species (e.g., L. dictyotum ) both glabrous- and pubescent-fruited forms occur, yet none of the above authors gave formal recognition to both forms. It is not known if both glabrous and puberulent fruits occur within the same population in L. densiflorum . The species is autogamous, but nothing is known about the rates of gene flow between and within populations.

Updated: 2020-08-07 09:39:15 gmt
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