Boechera canadensis

(Linnaeus) Al-Shehbaz

Novon 13: 384. 2003.

Basionym: Arabis canadensis Linnaeus Sp. Pl. 2: 665, 1200. 1753
Synonyms: Arabis falcata Michaux Arabis hirsuta var. ovata (Pursh) Torrey & A. Gray Arabis ovata (Pursh) Poiret
Treatment appears in FNA Volume 7. Treatment on page 369. Mentioned on page 352, 357, 359, 363.

Biennials; short-lived; sexual; caudex not evident. Stems 1 per plant, arising from center of rosette near ground surface, 2.5–10 (–12.5) dm, sparsely to densely pubescent proximally, trichomes simple, to 1 mm, glabrous or sparsely pubescent distally. Basal leaves: blade obovate to oblanceolate, 10–30 mm wide, margins dentate, ciliate proximally, trichomes simple, to 1 mm, surfaces moderately pubescent, trichomes simple, 0.5–1.5 mm, these mixed with smaller, 2-rayed or 3-rayed ones. Cauline leaves: 12–20, often concealing stem proximally; blade auricles absent or proximalmost blades with auricles 0.5–2 (–5) mm, surfaces of distalmost leaves sparsely pubescent. Racemes 15–65 (–82) -flowered, sometimes branched. Fruiting pedicels descending to horizontal, usually curved, rarely straight, 6–13 (–17) mm, pubescent or glabrous, trichomes subappressed, usually 2-rayed. Flowers divaricate-ascending to horizontal at anthesis; sepals pubescent; petals white, 3–5 × 0.7–1.2 mm, glabrous; pollen ellipsoid. Fruits pendent to horizontal, not appressed to rachis, often secund, curved, edges parallel, 4–10 cm × 2.5–4 mm; valves glabrous; ovules 40–62 per ovary; style 0.3–0.8 (–1.1) mm. Seeds uniseriate, 1.7–3.5 × 1.5–2.2 mm; wing continuous, 0.4–1 mm wide distally. 2n = 14.


Phenology: Flowering Apr–Jul.
Habitat: Bluffs, rocky slopes, ravines, open woods
Elevation: 0-1200 m

Distribution

V7 502-distribution-map.gif

Que., Ala., Ark., Conn., D.C., Fla., Ga., Ill., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.Y., N.C., Ohio, Okla., Pa., Tenn., Tex., Vt., Va., W.Va., Wis.

Discussion

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.

... more about "Boechera canadensis"
oblong +  and ovate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Ihsan A. Al-Shehbaz +  and Michael D. Windham +
(Linnaeus) Al-Shehbaz +
not +  and rosulate +
Arabis canadensis +
appendaged +  and unappendaged +
lyrate-pinnatifid +, dentate +  and entire +
dissected +, repand +, sinuate +, crenate +  and dentate +
obovate;oblanceolate +
much smaller +  and reduced +
10mm;30mm +
urceolate +, campanulate +  and tubular +
branched +  and simple +
not evident +
petiolate +  and sessile +
well-developed +
indistinct +
not +  and differentiated +
emarginate +  and entire +
Que. +, Ala. +, Ark. +, Conn. +, D.C. +, Fla. +, Ga. +, Ill. +, Iowa +, Kans. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, Tenn. +, Tex. +, Vt. +, Va. +, W.Va. +  and Wis. +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0-1200 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
actinomorphic +
divaricate-ascending +  and horizontal +
pendent +  and horizontal +
torulose +, falcate +, lanceolate +, oblong +  and linear +
Bluffs, rocky slopes, ravines, open woods +
annular +  and semiannular +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
pinnatifid +
prominent +  and obscure +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
rudimentary +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Flowering Apr–Jul. +
trinucleate +  and 3(-11)-colpate +
ellipsoid +
branched;15-65(-82)-flowered +
elongated +
reflexed +, ascending +  and erect +
slender +
mucilaginous +
margined +, not winged +  and winged +
biseriate +, sub-biseriate +  and uniseriate +
not +  and mucilaginous +
White (?) +, Black (?) +, Brown (?) +  and Yellow (?) +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
orbicular +, oblong +  and flattened +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.22 cm2.2 mm <br />0.0022 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 +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
persistent +
distinct +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Arabis falcata +, Arabis hirsuta var. ovata +  and Arabis ovata +
Boechera canadensis +
Boechera +
species +
pubescent +  and glabrous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
coiled +, 1-7-veined +  and veined +
anastomosing +
1.3 cm13 mm <br />0.013 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
straight +  and curved +
biennial +  and short-lived +
descending +  and horizontal +
glabrous +  and pubescent +
0.6 cm6 mm <br />0.006 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +
0.4mm;1mm +