Boechera dispar

(M. E. Jones) Al-Shehbaz

Novon 13: 384. 2003.

Basionym: Arabis dispar M. E. Jones Contr. W. Bot. 8: 41. 1898
Synonyms: Arabis juniperina M. E. Jones Arabis nardina Greene Arabis salubris M. E. Jones
Treatment appears in FNA Volume 7. Treatment on page 374. Mentioned on page 353.

Perennials; usually long-lived; sexual; caudex often woody. Stems usually 1 per caudex branch, arising from center of rosette near ground surface, 0.9–3 dm, densely pubescent proximally, trichomes short-stalked, 5–12-rayed, 0.1–0.3 mm, sparsely pubescent to glabrescent distally. Basal leaves: blade linear-oblanceolate, 2–5 mm wide, margins entire, not ciliate, surfaces densely pubescent, trichomes short-stalked, 5–12 (–16) -rayed, 0.1–0.3 mm. Cauline leaves: 1–5, not concealing stem; blade without auricles, surfaces of distalmost leaves pubescent. Racemes 4–15 (–20) -flowered, unbranched. Fruiting pedicels ascending, straight, 4–15 (–25) mm, pubescent, trichomes appressed, branched. Flowers ascending at anthesis; sepals pubescent; petals purple to lavender, 3.5–6 × 1–1.5 mm, glabrous; pollen ellipsoid. Fruits divaricate-ascending, not appressed to rachis, not secund, straight, edges parallel, 4–7.3 cm × 2.7–4 mm; valves glabrous; ovules 44–52 per ovary; style 0.05–0.1 mm. Seeds uniseriate, 1.9–2.3 mm in diam.; wing continuous, 0.3–0.5 mm wide.


Phenology: Flowering Apr–May.
Habitat: Rocky slopes and gravelly soil in desert scrub and pinyon-juniper communities
Elevation: 1500-2300 m

Discussion

Boechera dispar is a distinctive sexual diploid that is known from Inyo, Mono, and San Bernardino counties, California, and Nye County, Nevada.

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 dispar"
oblong +  and ovate +
Ihsan A. Al-Shehbaz +  and Michael D. Windham +
(M. E. Jones) Al-Shehbaz +
not +  and rosulate +
Arabis dispar +
appendaged +  and unappendaged +
lyrate-pinnatifid +, dentate +  and entire +
dissected +, repand +, sinuate +, crenate +  and dentate +
linear-oblanceolate +
much smaller +  and reduced +
2mm;5mm +
urceolate +, campanulate +  and tubular +
branched +  and simple +
petiolate +  and sessile +
well-developed +
indistinct +
not +  and differentiated +
emarginate +  and entire +
Calif. +  and Nev. +
4 cm40 mm <br />0.04 m <br /> (7.3 cm73 mm <br />0.073 m <br />) +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1500-2300 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
actinomorphic +
straight +
divaricate-ascending +
torulose +, falcate +, lanceolate +, oblong +  and linear +
Rocky slopes and gravelly soil in desert scrub and pinyon-juniper communities +
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 +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
rudimentary +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Flowering Apr–May. +
trinucleate +  and 3(-11)-colpate +
ellipsoid +
unbranched;4-15(-20)-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 (?) +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
orbicular +, oblong +  and flattened +
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 +
persistent +
distinct +
0.005 cm0.05 mm <br />5.0e-5 m <br /> (0.01 cm0.1 mm <br />1.0e-4 m <br />) +
Arabis juniperina +, Arabis nardina +  and Arabis salubris +
Boechera dispar +
Boechera +
species +
branched +  and short-stalked +
sparsely pubescent +  and glabrescent +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
coiled +, 1-7-veined +  and veined +
anastomosing +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
perennial +  and long-lived +
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +
0.3mm;0.5mm +