Boechera pratincola

(Greene) Windham & Al-Shehbaz

Harvard Pap. Bot. 12: 245. 2007.

Basionym: Arabis pratincola Greene Repert. Spec. Nov. Regni Veg. 5: 244. 1908
Synonyms: Arabis drummondii var. pratincola (Greene) M. Hopkins Arabis nemophila Greene
Treatment appears in FNA Volume 7. Treatment on page 399. Mentioned on page 361, 365, 374.

Perennials; usually short-lived; apomictic; caudex not woody. Stems usually 1 per caudex branch, arising from center of rosette near ground surface, 2–6 dm, pubescent proximally, trichomes sessile, 2-rayed or 3-rayed, 0.15–0.6 mm, glabrous distally. Basal leaves: blade oblanceolate, 1.5–5 (–7) mm wide, margins usually entire, rarely denticulate, ciliate at petiole base, trichomes to 0.4 mm, surfaces pubescent, trichomes sessile, 2–4 (–6) -rayed, 0.1–0.45 mm. Cauline leaves: (7–) 13–42, concealing stem proximally; blade auricles 1–4 mm, surfaces of distalmost leaves sparsely pubescent apically. Racemes (7–) 14–45-flowered, usually unbranched. Fruiting pedicels erect, straight, 5–12 mm, glabrous. Flowers ascending at anthesis; sepals glabrous; petals lavender, 6–10 × 1.5–2 mm, glabrous; pollen spheroid. Fruits erect, appressed to rachis, not secund, straight, edges parallel, 4–6.5 cm × 1.5–2 mm; valves glabrous; ovules 60–140 per ovary; style 0.1–0.3 mm. Seeds sub-biseriate, 1.4–2 × 1–1.4 mm; wing continuous, 0.1–0.35 mm wide.


Phenology: Flowering Jun–Aug.
Habitat: Rocky slopes and soil patches in open areas and along forest edges
Elevation: 1900-3200 m

Distribution

V7 573-distribution-map.gif

Calif., Idaho, Nev., Oreg.

Discussion

Morphological evidence suggests that Boechera pratincola is an apomictic species that arose through hybridization between B. paupercula and B. stricta (see M. D. Windham and I. A. Al-Shehbaz 2007b for detailed comparison).

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 pratincola"
oblong +  and ovate +
Ihsan A. Al-Shehbaz +  and Michael D. Windham +
(Greene) Windham & Al-Shehbaz +
not +  and rosulate +
Arabis pratincola +
appendaged +  and unappendaged +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
not +  and auriculate +
lyrate-pinnatifid +, dentate +  and entire +
dissected +, repand +, sinuate +, crenate +  and dentate +
oblanceolate +
much smaller +  and reduced +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
not woody +
petiolate +  and sessile +
well-developed +
indistinct +
not +  and differentiated +
emarginate +  and entire +
Calif. +, Idaho +, Nev. +  and Oreg. +
4 cm40 mm <br />0.04 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
1900-3200 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
actinomorphic +
straight +
torulose +, falcate +, lanceolate +, oblong +  and linear +
Rocky slopes and soil patches in open areas and along forest edges +
annular +  and semiannular +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
denticulate +
prominent +  and obscure +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
magenta +, red +, yellowish +, purple +, lavender +, pink +  and white +
6mm;10mm +
rudimentary +
oblanceolate +  and spatulate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Flowering Jun–Aug. +
trinucleate +  and 3(-11)-colpate +
spheroid +
Harvard Pap. Bot. +
unbranched;(7-)14-45-flowered +
slender +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
mucilaginous +
margined +, not winged +  and winged +
sub-biseriate +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
orbicular +, oblong +  and flattened +
0.1 cm1 mm <br />0.001 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 +
persistent +
distinct +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Arabis drummondii var. pratincola +  and Arabis nemophila +
Boechera pratincola +
Boechera +
species +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.045 cm0.45 mm <br />4.5e-4 m <br />) +
coiled +, 1-7-veined +  and veined +
anastomosing +
perennial +  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;0.35mm +