Boechera porphyrea

(Wooton & Standley) Windham

Harvard Pap. Bot. 11: 272. 2007.

Basionym: Arabis porphyrea Wooton & Standley Contr. U.S. Natl. Herb. 16: 123. 1913
Treatment appears in FNA Volume 7. Treatment on page 398. Mentioned on page 355, 358, 378.

Perennials; usually long-lived; apomictic; caudex often woody. Stems 1 to several per caudex branch, arising from center of rosette or arising laterally proximal to sterile shoots, somewhat elevated on woody base or from ground surface, 2–5 (–9) dm, usually glabrous proximally, rarely sparsely pubescent, trichomes simple and short-stalked, 2-rayed or 3-rayed, 0.1–0.5 mm, glabrous distally. Basal leaves: blade oblanceolate, (3–) 5–15 mm wide, margins dentate, ciliate at least along petiole, trichomes to 1 mm, surfaces pubescent, trichomes short-stalked, 2–6-rayed, 0.1–0.5 mm. Cauline leaves: 5–17 (–21), sometimes concealing stem proximally; blade auricles 0.5–3.5 (–5.5) mm, surfaces of distalmost leaves glabrous. Racemes 10–30 (–70) -flowered, usually unbranched. Fruiting pedicels horizontal, gently curved downward, 10–27 mm, glabrous. Flowers ascending at anthesis; sepals glabrous; petals lavender, 6.5–8.5 × 1–2.5 mm, glabrous; pollen spheroid. Fruits widely pendent, not appressed to rachis, not secund, usually curved, edges parallel, 3–7 cm × 1.8–2.5 mm; valves glabrous; ovules 100–160 per ovary; style 0.2–0.5 mm. Seeds sub-biseriate, 1.1–1.6 × 0.9–1.1 mm; wing continuous, 0.1–0.2 mm wide.


Phenology: Flowering late Mar-early May.
Habitat: Rocky slopes in evergreen woodlands or desert scrub
Elevation: 1200-2100 m

Discussion

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

Selected References

None.

Lower Taxa

None.

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... more about "Boechera porphyrea"
oblong +  and ovate +
Ihsan A. Al-Shehbaz +  and Michael D. Windham +
(Wooton & Standley) Windham +
not +  and rosulate +
Arabis porphyrea +
appendaged +  and unappendaged +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
not +  and auriculate +
lyrate-pinnatifid +, dentate +  and entire +
dissected +, repand +, sinuate +, crenate +  and dentate +
oblanceolate +
much smaller +  and reduced +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
petiolate +  and sessile +
well-developed +
indistinct +
not +  and differentiated +
emarginate +  and entire +
N.Mex. +  and Tex. +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
1200-2100 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
actinomorphic +
torulose +, falcate +, lanceolate +, oblong +  and linear +
Rocky slopes in evergreen woodlands or desert scrub +
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 +
magenta +, red +, yellowish +, purple +, lavender +, pink +  and white +
6.5mm;8.5mm +
rudimentary +
oblanceolate +  and spatulate +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Flowering late Mar-early May. +
trinucleate +  and 3(-11)-colpate +
spheroid +
Harvard Pap. Bot. +
unbranched;10-30(-70)-flowered +
downward +  and horizontal +
slender +
1 cm10 mm <br />0.01 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
mucilaginous +
margined +, not winged +  and winged +
sub-biseriate +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
orbicular +, oblong +  and flattened +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 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 +
pubescent +  and glabrous +
several +  and 1 +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
glabrous +  and pubescent +
Cruciferae +
Boechera porphyrea +
Boechera +
species +
short-stalked +  and simple +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-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 +
0.1mm;0.2mm +