Lepidium crenatum

(Greene) Rydberg

Bull. Torrey Bot. Club 33: 141. 1906.

Basionym: Thelypodium crenatum Greene Pittonia 4: 20. 1899
Synonyms: Lepidium montanum subsp. spatulatum (B. L. Robinson) C. L. Hitchcock Lepidium montanum var. spatulatum (B. L. Robinson) C. L. Hitchcock Lepidium scopulorum var. spatulatum B. L. Robinson Lepidium vaseyanum
Treatment appears in FNA Volume 7. Treatment on page 579. Mentioned on page 573, 587.

Perennials or subshrubs; (woody base aboveground); puberulent. Stems simple from base, erect, branched distally, (2–) 3–8 (–11) dm. Basal leaves rosulate (on sterile shoots); petiole (1.5–) 2.5–8 (–10) cm; blade oblanceolate to spatulate, (2–) 3–7 (–9) cm × 5–23 (–32) mm, margins crenate to serrate-crenate. Cauline leaves shortly petiolate or sessile; blade oblong to oblanceolate, 1–3.5 cm × 4–15 mm, base cuneate, not auriculate, margins entire. Racemes (subcorymbose panicles), slightly elongated in fruit; rachis puberulent, trichomes straight. Fruiting pedicels divaricate-ascending to horizontal, straight, (terete), 3–6 (–8) × 0.2–0.25 mm, puberulent adaxially. Flowers: sepals oblong to ovate, (1–) 1.3–1.8 (–2) × 0.9–1.2 mm; petals white, suborbicular to broadly obovate, (1.8–) 2–3 × 1.3–2 mm, claw 0.5–1 mm; stamens 6; filaments 1.4–1.6 mm, (glabrous); anthers 0.5–0.7 mm. Fruits broadly ovate, (2.5–) 3–3.5 (–4) × (2–) 2.3–2.8 mm, apically winged, apical notch 0.1–0.2mm deep; valves thin, smooth, not veined, glabrous; style 0.2–0.6 mm, exserted beyond apical notch. Seeds ovate, 1.5–2 × 1–1.3 mm.


Phenology: Flowering Jun–Aug.
Habitat: Pinyon-juniper and brush communities, clay bluff of sandstone mesa, arroyo banks
Elevation: 1800-2000 m

Distribution

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Colo., N.Mex.

Discussion

Of conservation concern.

Lepidium crenatum is known from Delta, Moffatt, Montezuma, and Montrose counties in Colorado. It was reported from Utah by C. L. Hitchcock (1936) and R. C. Rollins (1993), but we have not seen any material to confirm its occurrence there.

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 crenatum"
oblong +  and ovate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> - 0.07 cm0.7 mm <br />7.0e-4 m <br /> +
0.01 cm0.1 mm <br />1.0e-4 m <br /> - 0.02 cm0.2 mm <br />2.0e-4 m <br /> +
Ihsan A. Al-Shehbaz +  and John F. Gaskin +
- Greene Rydberg +
not auriculate +  and cuneate +
Thelypodium crenatum +
appendaged +  and unappendaged +
7 cm70 mm <br />0.07 m <br /> - 9 cm90 mm <br />0.09 m <br /> +
2.3 cm23 mm <br />0.023 m <br /> - 3.2 cm32 mm <br />0.032 m <br /> +
not +  and auriculate +
1 cm10 mm <br />0.01 m <br /> - 3.5 cm35 mm <br />0.035 m <br /> +
lobed +, crenate +, serrate +, denticulate +  and dentate +
oblong;oblanceolate +
much smaller +  and reduced +
0.4 cm4 mm <br />0.004 m <br /> - 1.5 cm15 mm <br />0.015 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 +
Colo. +  and N.Mex. +
1800-2000 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
0.14 cm1.4 mm <br />0.0014 m <br /> - 0.16 cm1.6 mm <br />0.0016 m <br /> +
actinomorphic +
filiform +, linear +, orbicular +, oblanceolate +, oblong +, spatulate +, obovate +, suborbicular +  and ovate +
0.35 cm3.5 mm <br />0.0035 m <br /> - 0.4 cm4 mm <br />0.004 m <br /> +
0.2 cm2 mm <br />0.002 m <br /> - 0.23 cm2.3 mm <br />0.0023 m <br /> +
0.3 cm3 mm <br />0.003 m <br /> - 0.35 cm3.5 mm <br />0.0035 m <br /> +
0.23 cm2.3 mm <br />0.0023 m <br /> - 0.28 cm2.8 mm <br />0.0028 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 +
Pinyon-juniper and brush communities, clay bluff of sandstone mesa, arroyo banks +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
crenate;serrate-crenate +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
0.18 cm1.8 mm <br />0.0018 m <br /> - 0.2 cm2 mm <br />0.002 m <br /> +
rudimentary +
suborbicular +  and broadly obovate +
0.13 cm1.3 mm <br />0.0013 m <br /> - 0.2 cm2 mm <br />0.002 m <br /> +
8 cm80 mm <br />0.08 m <br /> - 10 cm100 mm <br />0.1 m <br /> +
2.5 cm25 mm <br />0.025 m <br /> - 8 cm80 mm <br />0.08 m <br /> +
Flowering Jun–Aug. +
trinucleate +  and 3 - -11-colpate +
Bull. Torrey Bot. Club +
stout +  and slender +
mucilaginous +
not winged +, margined +  and winged +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.15 cm1.5 mm <br />0.0015 m <br /> - 0.2 cm2 mm <br />0.002 m <br /> +
0.1 cm1 mm <br />0.001 m <br /> - 0.13 cm1.3 mm <br />0.0013 m <br /> +
0.18 cm1.8 mm <br />0.0018 m <br /> - 0.2 cm2 mm <br />0.002 m <br /> +
persistent +  and caducous +
distinct +
ascending +  and spreading +
oblong +  and ovate +
0.09 cm0.9 mm <br />9.0e-4 m <br /> - 0.12 cm1.2 mm <br />0.0012 m <br /> +
perforated +  and complete +
reduced +
latiseptate +, schizocarpic +, samaroid +  and lomentaceous +
indehiscent +  and dehiscent +
angustiseptate +, flat +, angled +, terete +, torulose +, not +, segmented +  and nutletlike +
tetradynamous +
median +  and lateral +
branched +  and simple +
prostrate +  and decumbent +
entire +  and capitate +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
0.02 cm0.2 mm <br />2.0e-4 m <br /> - 0.06 cm0.6 mm <br />6.0e-4 m <br /> +
Lepidium montanum subsp. spatulatum +, Lepidium montanum var. spatulatum +, Lepidium scopulorum var. spatulatum +  and Lepidium vaseyanum +
Lepidium crenatum +
Lepidium +
species +
divaricate-ascending +  and horizontal +
scale-like +  and forked +
anastomosing +
perennial +, biennial +  and annual +
aquatics +  and terrestrial +