Boechera laevigata

(Muhlenberg ex Willdenow) Al-Shehbaz

Novon 13: 386. 2003.

Basionym: Turritis laevigata Muhlenberg ex Willdenow Sp. Pl. 3: 543. 1801
Synonyms: Arabis hastata Eaton Arabis heterophylla Nuttall Arabis laevigata (Muhlenberg ex Willdenow) Poiret Arabis lyrifolia de Candolle
Treatment appears in FNA Volume 7. Treatment on page 386. Mentioned on page 355, 368, 391.

Biennials; short-lived; sexual; caudex not evident. Stems 1 per plant, arising from center of rosette near ground surface, (1.5–) 3–11 dm, glabrous throughout. Basal leaves: blade obovate to oblanceolate, (4–) 10–40 mm wide, margins serrate or dentate, ciliate-mucronate on teeth, trichomes often minute, surfaces glabrous or sparsely pubescent, trichomes simple, 0.1–0.6 mm. Cauline leaves: 7–15, often concealing stem proximally; blade auricles 3–12 (–17) mm, surfaces of distalmost leaves glabrous. Racemes 16–45-flowered, sometimes branched. Fruiting pedicels suberect to divaricate-ascending, straight to slightly curved, 5–23 mm, glabrous. Flowers ascending at anthesis; sepals glabrous; petals white, 3–5 × 1–1.5 mm, glabrous; pollen ellipsoid. Fruits divaricate-ascending, not appressed to rachis, rarely somewhat secund, curved, edges parallel, (4–) 6–11.7 cm × 1–2 mm; valves glabrous; ovules 50–80 per ovary; style 0.1–0.7 (–1) mm. Seeds uniseriate, 1.2–2.2 × 0.8–1.4 mm; wing continuous, 0.1–0.3 mm wide distally. 2n = 14.


Phenology: Flowering Mar–May.
Habitat: Rocky bluffs, cedar glades, wooded hillsides, floodplains
Elevation: 100-500 m

Distribution

V7 545-distribution-map.gif

Ont., Que., Ala., Ark., Conn., Del., D.C., Ga., Ill., Ind., Iowa, Ky., Md., Mass., Mich., Mo., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn., Vt., Va., W.Va., Wis.

Discussion

The taxon sometimes treated as Arabis laevigata var. missouriensis is here recognized as a separate species (Boechera missouriensis) based on its significantly longer petals (5–10 versus 3–5 mm) and distinctive, lyrate-pinnatifid basal leaves that persist well beyond anthesis.

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 "Boechera laevigata"
oblong +  and ovate +
Ihsan A. Al-Shehbaz +  and Michael D. Windham +
(Muhlenberg ex Willdenow) Al-Shehbaz +
not +  and rosulate +
Turritis laevigata +
appendaged +  and unappendaged +
1.2 cm12 mm <br />0.012 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
not +  and auriculate +
lyrate-pinnatifid +, dentate +  and entire +
dissected +, repand +, sinuate +, crenate +  and dentate +
obovate;oblanceolate +
much smaller +  and reduced +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
not evident +
petiolate +  and sessile +
well-developed +
indistinct +
not +  and differentiated +
emarginate +  and entire +
Ont. +, Que. +, Ala. +, Ark. +, Conn. +, Del. +, D.C. +, Ga. +, Ill. +, Ind. +, Iowa +, Ky. +, Md. +, Mass. +, Mich. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, S.C. +, Tenn. +, Vt. +, Va. +, W.Va. +  and Wis. +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
6 cm60 mm <br />0.06 m <br /> (11.7 cm117 mm <br />0.117 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
100-500 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
actinomorphic +
divaricate-ascending +
torulose +, falcate +, lanceolate +, oblong +  and linear +
Rocky bluffs, cedar glades, wooded hillsides, floodplains +
annular +  and semiannular +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
dentate +  and serrate +
ciliate-mucronate +
prominent +  and obscure +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
rudimentary +
oblanceolate +  and spatulate +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Flowering Mar–May. +
trinucleate +  and 3(-11)-colpate +
ellipsoid +
branched;16-45-flowered +
straight +  and slightly curved +
suberect +  and divaricate-ascending +
slender +
0.5 cm5 mm <br />0.005 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
mucilaginous +
margined +, not winged +  and winged +
biseriate +, sub-biseriate +  and uniseriate +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
orbicular +, oblong +  and flattened +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
persistent +  and caducous +
distinct +
spreading +, ascending +  and erect +
oblong +  and ovate +
reduced +
latiseptate +, schizocarpic +, samaroid +  and lomentaceous +
indehiscent +  and dehiscent +
angustiseptate +, flat +, angled +, terete +, torulose +, not +, segmented +  and nutletlike +
tetradynamous +
branched +  and unbranched +
procumbent +  and decumbent +
subsessile +, sessile +  and petiolate +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
distinct +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
glabrous +  and pubescent +
Arabis hastata +, Arabis heterophylla +, Arabis laevigata +  and Arabis lyrifolia +
Boechera laevigata +
Boechera +
species +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
coiled +, 1-7-veined +  and veined +
anastomosing +
biennial +  and short-lived +
hispid +, hirsute +, pubescent +  and glabrous +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +
0.1mm;0.3mm +