Brassica tournefortii

Gouan

Ill. Observ. Bot., 44, plate 20A. 1773.

Common names: Sahara mustard
WeedyIntroducedIllustrated
Treatment appears in FNA Volume 7. Treatment on page 424. Mentioned on page 419, 420.

Annuals; densely hirsute proximally, glabrescent distally. Stems usually branched basally, (widely) branched distally, (1–) 3–7 (–10) dm. Basal leaves: (rosettes persistent); petiole (broad) 2–10 cm; blade lyrate to pinnatisect, 2–30 cm × 10–50 (–100) mm, (margins serrate-dentate), 4–10 lobes each side. Cauline leaves sessile; blade (reduced in size distally, distalmost bractlike), base tapered, not auriculate or amplexicaul. Racemes not paniculately branched. Fruiting pedicels widely spreading, 8–15 mm. Flowers: sepals 5–4.5 × 1–1.5 mm; petals pale-yellow, fading or, sometimes, white, oblanceolate, 4–7 × 1.5–2 (–2.5) mm, claw 1–3 mm, apex rounded; filaments 2.5–4 mm; anthers 1–1.3 mm; gynophore to 1 mm. Fruits (shortly stipitate); widely spreading to ascending (not appressed to rachis), torulose, cylindric, 3–7 cm × 2–4 (–5) mm; valvular segment with 6–12 (–15) seeds per locule, 2.2–5 cm, terminal segment 1 (–3) -seeded, (cylindric, stout), 10–20 mm. Seeds light reddish-brown or black, 1–1.2 mm diam.; seed-coat prominently reticulate, mucilaginous when wetted. 2n = 20.


Phenology: Flowering Feb–Apr.
Habitat: Roadsides, waste places, old fields, washes, open desert areas intermixed with desert shrubs
Elevation: 0-800 m

Distribution

V7 626-distribution-map.gif

Introduced; Ariz., Calif., Nev., Tex., Utah, Europe, Asia, Africa, also in nw Mexico, Australia

Discussion

Brassica tournefortii was first reported from California (Imperial, Riverside, and western San Bernardino counties) by W. L. Jepson ([1923–1925]), with the first collections appearing from southern California in 1941 (R. C. Rollins and I. A. Al-Shehbaz 1986), Arizona in 1959 (T. H. Kearney and R. H. Peebles 1960), Nevada in 1977, and Texas in 1978 (D. E. Lemke and R. D. Worthington 1991).

Selected References

None.

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

... more about "Brassica tournefortii"
ovate +  and oblong +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
rounded +
Suzanne I. Warwick +
not +  and rosulate +
amplexicaul +, not auriculate +  and tapered +
appendaged +  and unappendaged +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
not +  and auriculate +
2 cm20 mm <br />0.02 m <br /> (30 cm300 mm <br />0.3 m <br />) +
lyrate-pinnatifid +, dentate +  and entire +
dissected +, repand +, sinuate +, crenate +  and dentate +
lyrate;pinnatisect +
much smaller +  and reduced +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
well-developed +
distinct +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
differentiated +
Sahara mustard +
emarginate +  and entire +
incumbent +, accumbent +  and conduplicate +
Ariz. +, Calif. +, Nev. +, Tex. +, Utah +, Europe +, Asia +, Africa +, also in nw Mexico +  and Australia +
0-800 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
actinomorphic +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
indehiscent +  and dehiscent +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
widely spreading +  and ascending +
cylindric +  and torulose +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
stipitate +  and sessile +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Roadsides, waste places, old fields, washes, open desert areas intermixed with desert shrubs +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
sinuate-serrate;lobed;sinuate-serrate;lobed;dentate +
not +  and confluent +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
white +, , +, fading +  and pale-yellow +
rudimentary +
oblanceolate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Flowering Feb–Apr. +
trinucleate +  and 3(-11)-colpate +
Ill. Observ. Bot., +
slender +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
mucilaginous +
aseriate +, uniseriate +  and biseriate +
not +  and mucilaginous +
black +  and light reddish-brown +
1mm;1.2mm +
6 +  and 12 +
globose +
4-angled +, terete +  and torulose +
persistent +  and caducous +
distinct +
spreading +, ascending +  and erect +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
reduced +
indehiscent +  and dehiscent +
terete +  and segmented +
indehiscent +  and dehiscent +
terete +  and segmented +
Weedy +, Introduced +  and Illustrated +
tetradynamous +
procumbent +  and decumbent +
2-lobed +  and entire +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
Cruciferae +
Brassica tournefortii +
Brassica +
species +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
scale-like +  and forked +
2.2 cm22 mm <br />0.022 m <br /> (5 cm50 mm <br />0.05 m <br />) +
anastomosing +
glabrescent +  and hirsute +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +
11 +, 10 +, 9 +, 8 +  and 7 +