Thlaspi arvense

Linnaeus

Sp. Pl. 2: 646. 1753.

Common names: Fanweed field pennycress stinkweed
WeedyIntroduced
Synonyms: Teruncius arvensis (Linnaeus) Lunell
Treatment appears in FNA Volume 7. Treatment on page 746.

Plants (sometimes glaucous), glabrous throughout. Stems (0.9–) 1.5–5.5 (–8) dm. Basal leaves not rosulate; petiole 0.5–3 cm; blade oblanceolate, spatulate, or obovate, 1–5 cm × 4–23 mm, base attenuate or cuneate, margins entire, repand, or coarsely dentate, apex rounded. Cauline leaves: blade oblong, (0.5–) 1.5–4 (–8) cm × (2–) 5–15 (–25) mm, apex rounded, obtuse, or subacute. Fruiting pedicels straight or slightly upcurved, (5–) 9–13 (–15) mm. Flowers: sepals (1.5–) 2–3 (–3.3) × 1–1.5 mm; petals (2.4–) 3–4.5 (–5) × (0.8–) 1.1–1.7 mm, narrowed to clawlike base (ca. 1 mm), apex obtuse or emarginate; filaments (1–) 1.5–2.2 mm; anthers 0.3–0.5 mm. Fruits obovate or suborbicular, (0.6–) 0.9–2 cm × (5–) 7–20 mm, base obtuse or rounded, apex deeply emarginate, notch ca. 5 mm deep; wings broad throughout, 1–1.5 mm wide basally, 3.5–5 mm wide apically; ovules 6–16 per ovary; style 0.1–0.3 mm. Seeds (1.2–) 1.6–2 (–2.3) × 1.1–1.3 mm, concentrically striate. 2n = 14.


Phenology: Flowering Mar–Aug.
Habitat: Roadsides, fields, waste places, lawns, gardens, railroad tracks, stream banks, bluffs, thickets, slopes, floodplains, woods
Elevation: 0-2000 m

Distribution

V7 1313-distribution-map.gif

Introduced; 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., Europe, Asia

Discussion

Thlaspi arvense is a cosmopolitan weed of Eurasian origin. Cattle feeding on it develop tainted milk.

Lower Taxa

None.

"elongated" is not a number."thick" is not a number."dm" is not declared as a valid unit of measurement for this property.

... more about "Thlaspi arvense"
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
1.3 cm13 mm <br />0.013 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
straight +
Emarginate (?) +, Obtuse (?) +, Subacute (?) +  and Rounded (?) +
0.9 cm9 mm <br />0.009 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
Ihsan A. Al-Shehbaz +
Linnaeus +
rounded +, obtuse +, cuneate +  and attenuate +
appendaged +  and unappendaged +
4 cm40 mm <br />0.04 m <br /> (8 cm80 mm <br />0.08 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
dissected +, repand +, sinuate +, crenate +  and dentate +
oblong;obovate;spatulate;obovate;spatulate;oblanceolate +
much smaller +  and reduced +
5mm;15mm +
urceolate +, campanulate +  and tubular +
branched +  and simple +
well-developed +
distinct +
indistinct +
not +  and differentiated +
Fanweed +, field pennycress +  and stinkweed +
emarginate +  and entire +
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. +, Europe +  and Asia +
0-2000 m +
straight +  and curved +
not winged +  and unappendaged +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
connate +  and distinct +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
actinomorphic +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.9cm;2cm +
suborbicular +  and obovate +
0.7 cm7 mm <br />0.007 m <br /> (2 cm20 mm <br />0.02 m <br />) +
angustiseptate +, keeled +, suborbicular +, obcordate +, obovate +  and oblong +
Roadsides, fields, waste places, lawns, gardens, railroad tracks, stream banks, bluffs, thickets, slopes, floodplains, woods +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
sinuate-dentate +, dentate +  and entire +
dentate;repand;dentate;repand;entire +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
rudimentary +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering Mar–Aug. +
trinucleate +  and 3(-11)-colpate +
elongated +
slender +
best1975a +
mucilaginous +
aseriate +, biseriate +  and uniseriate +
0.2 cm2 mm <br />0.002 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
not +  and mucilaginous +
White (?) +, Black (?) +, Brown (?) +  and Yellow (?) +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
persistent +  and caducous +
distinct +
ascending +  and erect +
oblong +  and ovate +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
reduced +
angustiseptate +, 4-angled +  and terete +
angustiseptate +, 4-angled +  and terete +
Weedy +  and Introduced +
tetradynamous +
branched +  and unbranched +
procumbent +  and decumbent +
2-lobed +, entire +, conical +  and capitate +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
not +  and obsolete +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Teruncius arvensis +
Thlaspi arvense +
species +
scale-like +  and forked +
anastomosing +
biennial +  and annual +
perennial +, biennial +  and annual +
aquatics +  and terrestrial +
3.5mm;5mm +