Boechera pulchra

(M. E. Jones ex S. Watson) W. A. Weber

Phytologia 51: 370. 1982.

Basionym: Arabis pulchra M. E. Jones ex S. Watson Proc. Amer. Acad. Arts 22: 468. 1887
Treatment appears in FNA Volume 7. Treatment on page 400. Mentioned on page 352, 354, 369, 375, 379, 412.

Perennials; long-lived; sexual; caudex woody. Stems usually 1 per caudex branch, arising from center of leaf tufts, elevated above ground surface on woody base, (1.5–) 3–7.5 dm, densely pubescent proximally, trichomes short-stalked, usually 4–7-rayed, 0.1–0.3 mm, similarly pubescent distally. Basal leaves: blade linear to linear-oblanceolate, 1–3 mm wide, margins entire, not ciliate, surfaces densely pubescent, trichomes short-stalked, 4–9-rayed, 0.1–0.3 mm. Cauline leaves: 10–30, often concealing stem proximally; blade auricles absent or, rarely, to 0.5 mm, surfaces of distalmost leaves pubescent. Racemes 8–25-flowered, usually unbranched. Fruiting pedicels reflexed, abruptly recurved at base, otherwise straight, 8–16 mm, pubescent, trichomes appressed, branched. Flowers descending at anthesis; sepals pubescent; petals usually purple, rarely white, 9–16 × 2–4 (–5) mm, sparsely pubescent or glabrous (trichomes scattered abaxially); pollen ellipsoid. Fruits strongly reflexed, often appressed to rachis, sometimes somewhat secund, straight, edges parallel, 3.3–8 cm × 2.5–4 mm; valves pubescent throughout; ovules 68–106 per ovary; style 0.1–0.3 mm. Seeds biseriate, 1.7–2.8 × 1.5–2.2 mm; wing continuous, 0.25–0.65 mm wide.


Phenology: Flowering Mar–Jun.
Habitat: Rocky, gravelly or sandy slopes in chaparral, sagebrush and desert scrub communities
Elevation: 800-2800 m

Distribution

V7 575-distribution-map.gif

Calif., Nev., Mexico (Baja California)

Discussion

Boechera pulchra is a distinctive diploid separated from related sexual species (B. formosa and B. lincolnensis) by abruptly recurved fruiting pedicels and purple flowers, and from apomictic hybrids (e.g., B. xylopoda) by having fruits densely pubescent throughout.

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 pulchra"
oblong +  and ovate +
Ihsan A. Al-Shehbaz +  and Michael D. Windham +
(M. E. Jones ex S. Watson) W. A. Weber +
not +  and rosulate +
straight +
recurved +  and reflexed +
0.8 cm8 mm <br />0.008 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
Arabis pulchra +
appendaged +  and unappendaged +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
lyrate-pinnatifid +, dentate +  and entire +
dissected +, repand +, sinuate +, crenate +  and dentate +
linear;linear-oblanceolate +
much smaller +  and reduced +
1mm;3mm +
urceolate +, campanulate +  and tubular +
branched +  and simple +
petiolate +  and sessile +
well-developed +
indistinct +
not +  and differentiated +
emarginate +  and entire +
Calif. +, Nev. +  and Mexico (Baja California) +
3.3 cm33 mm <br />0.033 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
800-2800 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
actinomorphic +
straight +
torulose +, falcate +, lanceolate +, oblong +  and linear +
Rocky, gravelly or sandy slopes in chaparral, sagebrush and desert scrub 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 +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
rudimentary +
glabrous +  and pubescent +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering Mar–Jun. +
trinucleate +  and 3(-11)-colpate +
ellipsoid +
unbranched;8-25-flowered +
elongated +
reflexed +, ascending +  and erect +
slender +
mucilaginous +
margined +, not winged +  and winged +
not +  and mucilaginous +
White (?) +, Black (?) +, Brown (?) +  and Yellow (?) +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.28 cm2.8 mm <br />0.0028 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 +
persistent +
distinct +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Cruciferae +
Boechera pulchra +
Boechera +
species +
branched +  and short-stalked +
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 +
perennial +  and long-lived +
hispid +, hirsute +, pubescent +  and glabrous +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +
0.25mm;0.65mm +