Dryopetalon runcinatum

A. Gray

Smithsonian Contr. Knowl. 5(6): 12, plate 11. 1853.

Illustrated
Synonyms: Coelophragmus umbrosus (B. L. Robinson) O. E. Schulz Dryopetalon runcinatum var. laxiflorum Rollins Sisymbrium umbrosum
Treatment appears in FNA Volume 7. Treatment on page 688. Mentioned on page 687.

Annuals or biennials; usually sparsely to densely hirsute proximally, rarely glabrous throughout. Stems erect, unbranched or branched basally, branched distally, 2–8 dm. Basal leaves: petiole (1–) 2–6 (–8) cm; blade spatulate to obovate in outline, lyrate, pinnatifid, or bipinnately lobed, (2–) 4–20 (–25) cm × 30–80 mm, surfaces glabrous or hirsute. Cauline leaves shortly petiolate or sessile; blade base not auriculate, similar to basal, smaller distally. Racemes lax or dense. Fruiting pedicels divaricate-ascending, 5–15 (–20) mm, glabrous or pubescent. Flowers: sepals (2.5–) 3.5–4.5 (–5) × 1.5–2 mm; petals white to purplish, spatulate, 6–9 (–11) × 2.5–3.5 (–4.5) mm, claw 2.5–4 (–5) mm, margins pinnatifid, 5–7 (–11) -lobed, papillate basally; filaments papillate basally, median pairs 3–5 mm, lateral pair 2.5–4 mm; anthers oblong, 0.7–1 mm. Fruits linear, (straight or arcuate), 2–6 cm × 0.5–1.2 mm; ovules 60–110 per ovary; style 0.1–0.7 (–1) mm. Seeds 0.6–0.8 × 0.4–0.6 mm, not winged. 2n = 24.


Phenology: Flowering Jan–May.
Habitat: Ledges, shade of boulders and cliffs, foothills, canyons, scrub woodlands, streambeds, rocky basalt, crevices
Elevation: 800-1900 m

Distribution

V7 1184-distribution-map.gif

Ariz., N.Mex., Tex., Mexico (Chihuahua), Mexico (Sinaloa), Mexico (Sonora)

Discussion

Dryopetalon runcinatum is easily distinguished from other mustards in the flora area by having divided petals. In the United States, it is restricted to Cochise, Pima, Pinal, and Santa Cruz counties in Arizona, Catron, Dona Ana, Hidalgo, and Luna counties in New Mexico, and El Paso County in Texas.

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 "Dryopetalon runcinatum"
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Ihsan A. Al-Shehbaz +
A. Gray +
not +  and rosulate +
appendaged +  and unappendaged +
20 cm200 mm <br />0.2 m <br /> (25 cm250 mm <br />0.25 m <br />) +
4 cm40 mm <br />0.04 m <br /> (20 cm200 mm <br />0.2 m <br />) +
dentate +  and runcinate or pinnatifid +
lobed;pinnatifid;lobed;pinnatifid;lyrate;spatulate;obovate +
much smaller +  and reduced +
30mm;80mm +
urceolate +, campanulate +  and tubular +
branched +  and simple +
sessile +  and petiolate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
well-developed +
distinct +
narrowed +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
not +  and differentiated +
emarginate +  and entire +
Ariz. +, N.Mex. +, Tex. +, Mexico (Chihuahua) +, Mexico (Sinaloa) +  and Mexico (Sonora) +
800-1900 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
lateral +  and median +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
zygomorphic +  and actinomorphic +
stipitate +  and sessile +
flattened +, terete +, torulose +  and linear-oblong +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Ledges, shade of boulders and cliffs, foothills, canyons, scrub woodlands, streambeds, rocky basalt, crevices +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
dentate to pinnatifid +  and entire +
papillate +
5-7(-11)-lobed;pinnatifid +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
rudimentary +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
6 cm60 mm <br />0.06 m <br /> (8 cm80 mm <br />0.08 m <br />) +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Flowering Jan–May. +
trinucleate +  and 3(-11)-colpate +
Smithsonian Contr. Knowl. +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
elongated +
divaricate-ascending +
pubescent +  and glabrous +
slender +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
mucilaginous +
aseriate +, uniseriate +  and biseriate +
not +  and mucilaginous +
White (?) +, Black (?) +, Brown (?) +  and Yellow (?) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
not basally +  and saccate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
persistent +  and caducous +
distinct +
erect +  and ascending +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
not veined +  and complete +
reduced +
latiseptate +, schizocarpic +, samaroid +  and lomentaceous +
indehiscent +  and dehiscent +
angustiseptate +, flat +, angled +, terete +, torulose +, not +, segmented +  and nutletlike +
Illustrated +
tetradynamous +
branched +  and unbranched +
procumbent +  and decumbent +
entire +  and capitate +
subsessile +, sessile +  and petiolate +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
distinct +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
hirsute +  and glabrous +
Coelophragmus umbrosus +, Dryopetalon runcinatum var. laxiflorum +  and Sisymbrium umbrosum +
Dryopetalon runcinatum +
Dryopetalon +
species +
dendritic +  and simple +
coiled +, 1-7-veined +  and veined +
anastomosing +
biennial +  and annual +
hirsute +  and glabrous +
perennial +, biennial +  and annual +
subshrub +  and shrub +
aquatics +  and terrestrial +
glabrous +  and pubescent +