Lepidium latipes

Hooker

Icon. Pl. 1: plate 41. 1836.

Illustrated
Synonyms: Lepidium latipes var. heckardii Rollins Nasturtium latipes
Treatment appears in FNA Volume 7. Treatment on page 585. Mentioned on page 574.

Annuals; puberulent or hirsute. Stems simple or several from base, erect to ascending or (outer ones) decumbent, unbranched or branched, 0.2–1.5 (–3.8) dm. Basal leaves (soon withered); not rosulate; petiole often undifferentiated (to 3 cm); blade linear, 2–10 cm × 1–4 mm, margins entire, dentate, or pinnatisect (lobes 2–10 pairs, margins entire or dentate). Cauline leaves similar to basal, smaller, blade base attenuate, not auriculate, margins entire. Racemes (subcapitate to cylindrical), elongated or not in fruit, (compact); rachis puberulent, trichomes straight, cylindrical. Fruiting pedicels erect to slightly ascending, straight and appressed to rachis or distally slightly recurved, (strongly flattened), 2.5–5 × 0.9–1.4 mm, usually puberulent throughout, rarely only adaxially. Flowers: sepals (somewhat persistent), ovate, 1.1–1.4 × 0.6–0.8 mm; petals greenish, obovate-oblong, 1.9–3 × 0.8–1.3 mm, claw absent, (usually pubescent outside, with fringed margin, rarely glabrescent); stamens 4, median; filaments 0.8–1.1 mm; anthers 0.15–0.2 mm. Fruits oblong-ovate, 5–7 × 2.8–4 mm, apically winged, apical notch 1.4–2.8 mm deep; valves thick, smooth, strongly reticulate-veined, hirsute and puberulent, (trichomes spreading, mixed with smaller ones); style obsolete, included in apical notch. Seeds oblong, 2–2.4 × 1.1–1.3 mm.


Phenology: Flowering Mar–Jun.
Habitat: Margins of vernal pools, edges of salt marshes, alkaline flats and adobe, pastures, mud-wet fields
Elevation: 0-700 m

Distribution

V7 948-distribution-map.gif

Calif., Mexico (Baja California)

Discussion

Variety heckardii, which is said to differ from var. latipes mainly by having elongated stems simple at base (instead of short and branched basally), grows mixed with var. latipes in single populations. It appears that the difference is trivial and may well be controlled by a few-gene difference. In our opinion, formal distinction is unwarranted; similar conditions exist in other species (e.g., 27. Lepidium nitidum).

Selected References

None.

Lower Taxa

None.

"not" is not a number. "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 "Lepidium latipes"
oblong +  and ovate +
0.015 cm0.15 mm <br />1.5e-4 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
Ihsan A. Al-Shehbaz +  and John F. Gaskin +
Hooker +
appendaged +  and unappendaged +
not auriculate +  and attenuate +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
lobed +, crenate +, serrate +, denticulate +  and dentate +
much smaller +  and reduced +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
sessile +  and petiolate +
well-developed +
distinct +
differentiated +
emarginate +  and entire +
incumbent +  and accumbent +
Calif. +  and Mexico (Baja California) +
0-700 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
actinomorphic +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
oblong-ovate +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
terete +, inflated +, angustiseptate +, globose +, obovoid +, ovoid +, orbicular +, elliptic +, obcordate +, cordate +, obovate +, ovate +  and oblong +
terete +, inflated +, angustiseptate +, globose +, obovoid +, ovoid +, orbicular +, elliptic +, obcordate +, cordate +, obovate +, ovate +  and oblong +
Margins of vernal pools, edges of salt marshes, alkaline flats and adobe, pastures, mud-wet fields +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
entire +, pinnatisect +  and dentate +
divided;dentate;divided;dentate +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
1.9mm;3mm +
rudimentary +
obovate-oblong +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
undifferentiated +
Flowering Mar–Jun. +
trinucleate +  and 3(-11)-colpate +
stout +  and slender +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
recurved +, erect +  and slightly ascending +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
mucilaginous +
not winged +, margined +  and winged +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.2 cm2 mm <br />0.002 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
persistent +  and caducous +
distinct +
ascending +  and spreading +
perforated +  and complete +
reduced +
latiseptate +, schizocarpic +, samaroid +  and lomentaceous +
indehiscent +  and dehiscent +
angustiseptate +, flat +, angled +, terete +, torulose +, not +, segmented +  and nutletlike +
Illustrated +
tetradynamous +
branched +, unbranched +  and simple +
prostrate +  and decumbent +
erect +  and ascending or decumbent +
entire +  and capitate +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
Lepidium latipes var. heckardii +  and Nasturtium latipes +
Lepidium latipes +
Lepidium +
species +
cylindrical +
reticulate-veined +
puberulent +  and hirsute +
anastomosing +
hirsute +  and puberulent +
perennial +, biennial +  and annual +
aquatics +  and terrestrial +
pilose +, hirsute +, pubescent +  and glabrous +