Lepidium integrifolium

Nuttall in J. Torrey and A. Gray

in J. Torrey and A. Gray, Fl. N. Amer. 1: 116. 1838.

Synonyms: Lepidium montanum subsp. integrifolium (Nuttall) C. L. Hitchcock Lepidium montanum var. integrifolium (Nuttall) C. L. Hitchcock Lepidium utahense A. Nelson Lepidium zionis (Nuttall) Kuntze Nasturtium integrifolium
Treatment appears in FNA Volume 7. Treatment on page 583. Mentioned on page 572, 573, 587.

Perennials; (caudex often thick, not aboveground, covered with persistent petiolar remains); puberulent. Stems several from base (caudex), ascending, branched distally, (1–) 1.5–3.5 (–4) dm. Basal leaves rosulate; petiole (0.5–) 1.5–6 (–7.5) cm; blade oblanceolate to obovate, (1.5–) 2.5–7 (–9) cm × (10–) 15–25 mm, margins usually entire, rarely denticulate subapically. Cauline leaves shortly petiolate or sessile; blade narrowly lanceolate to broadly oblanceolate, 1–5 cm × 2–9 (–12) mm, base cuneate, not auriculate, margins usually entire, rarely denticulate subapically. Racemes elongated in fruit; rachis puberulent, trichomes straight, sometimes clavate. Fruiting pedicels divaricate-ascending to horizontal, straight, (not winged), (4–) 5–10 × 0.3–0.5 mm, puberulent adaxially. Flowers: sepals oblong-obovate, (1.5–) 1.8–2.5 × 0.8–1.3 mm; petals white, obovate, (2.3) 2.5–3.6 (–4) × 1.5–2.2 mm, claw 0.5–1 mm; stamens (2 or) 4 (or 6), median and lateral when 4, (erect); filaments 1.7–2.5 mm, (glabrous); anthers 0.5–0.8 mm. Fruits ovate, (3–) 3.2–4 (–4.4) × 2–3.5 mm, apically winged, apical notch 0.1–0.3 mm deep; valves thin, smooth, not veined, glabrous; style 0.5–0.8 (–1) mm, exserted beyond apical notch. Seeds ovate, 1.8–2 × 0.9–1.1 mm.


Phenology: Flowering Jun–Jul.
Habitat: Alkaline and saline meadows
Elevation: 1300-2000 m

Discussion

Of conservation concern.

The circumscription of Lepidium integrifolium is somewhat controversial. C. L. Hitchcock (1936) treated it as two varieties or (Hitchcock 1950) two subspecies of L. montanum, whereas R. C. Rollins (1993) treated it as a distinct species with two varieties. Rollins indicated that the species has two stamens, but such occurrence is rather rare. Most commonly, it has four stamens and is readily distinguished from related species by having four nectar glands and sepals sparsely pubescent subapically with crisped trichomes. Nothing is known about the populational variation of stamen number in the species and whether one or more taxa are involved.

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 "Lepidium integrifolium"
oblong +  and ovate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Ihsan A. Al-Shehbaz +  and John F. Gaskin +
Nuttall in J. Torrey and A. Gray +
not auriculate +  and cuneate +
appendaged +  and unappendaged +
7 cm70 mm <br />0.07 m <br /> (9 cm90 mm <br />0.09 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
not +  and auriculate +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
lobed +, crenate +, serrate +, denticulate +  and dentate +
narrowly lanceolate;broadly oblanceolate +
much smaller +  and reduced +
0.2 cm2 mm <br />0.002 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
sessile +  and petiolate +
well-developed +
distinct +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
differentiated +
emarginate +  and entire +
incumbent +  and accumbent +
Ariz. +, Nev. +, Utah +  and Wyo. +
1300-2000 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
actinomorphic +
filiform +, linear +, orbicular +, oblanceolate +, oblong +, spatulate +, obovate +, suborbicular +  and ovate +
0.4 cm4 mm <br />0.004 m <br /> (0.44 cm4.4 mm <br />0.0044 m <br />) +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 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 +
Alkaline and saline meadows +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
denticulate;denticulate +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
2.3 cm23 mm <br />0.023 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
2.5mm;3.6mm +
rudimentary +
obovate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
6 cm60 mm <br />0.06 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Flowering Jun–Jul. +
trinucleate +  and 3(-11)-colpate +
in J. Torrey and A. Gray, Fl. N. Amer. +
stout +  and slender +
mucilaginous +
not winged +, margined +  and winged +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
persistent +  and caducous +
distinct +
ascending +  and spreading +
oblong-obovate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
perforated +  and complete +
reduced +
latiseptate +, schizocarpic +, samaroid +  and lomentaceous +
indehiscent +  and dehiscent +
angustiseptate +, flat +, angled +, terete +, torulose +, not +, segmented +  and nutletlike +
tetradynamous +
lateral +  and median +
prostrate +  and decumbent +
entire +  and capitate +
subsessile +, sessile +  and petiolate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
distinct +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Lepidium montanum subsp. integrifolium +, Lepidium montanum var. integrifolium +, Lepidium utahense +, Lepidium zionis +  and Nasturtium integrifolium +
Lepidium integrifolium +
Lepidium +
species +
divaricate-ascending +  and horizontal +
anastomosing +
perennial +, biennial +  and annual +
aquatics +  and terrestrial +
pilose +, hirsute +, pubescent +  and glabrous +