Streptanthus cutleri

Cory

Rhodora 45: 259. 1943.

IllustratedConservation concern
Treatment appears in FNA Volume 7. Treatment on page 709. Mentioned on page 701.

Annuals; glabrous throughout. Stems (simple from base), usually branched distally, 2–7 dm. Basal leaves subrosulate; petiolate; blade oblanceolate, 2.5–20 cm, margins runcinate-pinnatifid. Cauline leaves (petiolate); blade oblanceolate, 4–20 cm × 10–70 mm, (smaller distally), base not auriculate, margins runcinate-pinnatifid (undivided, usually entire distally). Racemes ebracteate, (lax). Fruiting pedicels divaricate-ascending, (5–) 10–27 mm. Flowers (strongly zygomorphic); calyx campanulate; sepals (ascending), dark purple, 8–12 mm, not keeled; petals lavender to purple-lavender, (in 2 unequal pairs), abaxial pair undifferentiated into blade and claw, 5–6 mm, margins crisped, adaxial pair 15–26 mm, (not crisped), claw 7–11 mm, crisped, narrower than blade; stamens in 3 unequal pairs; filaments distinct: abaxial pair 6–7 mm, lateral pair 3–5 mm, adaxial pair 8–12 mm; anthers: abaxial and lateral pairs fertile, 4–5 mm, adaxial pair fertile, 3–3.5 mm; gynophore 0.2–0.5 mm. Fruits ascending, smooth, straight, strongly flattened, 3.2–7.5 cm × 4–5 mm; valves each with prominent midvein; replum straight; ovules 30–46 per ovary; style 0.2–0.5 mm; stigma 2-lobed. Seeds orbicular, 3–4 mm diam.; wing 0.5–1 mm wide, continuous.


Phenology: Flowering Feb–Apr.
Habitat: Talus slopes, rocky hillsides, gravelly and dry stream beds, sand flats, limestone slopes, open scrub or woodland
Elevation: 400-700 m

Discussion

Of conservation concern.

In Texas, Streptanthus cutleri is restricted to the Big Bend area in Brewster County.

Selected References

None.

Lower Taxa

None.

"narrower" is not a number."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 "Streptanthus cutleri"
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
undifferentiated +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
lateral +  and abaxial +
linear +  and oblong +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Ihsan A. Al-Shehbaz +
not auriculate +
appendaged +  and unappendaged +
4 cm40 mm <br />0.04 m <br /> (20 cm200 mm <br />0.2 m <br />) +
lyrate-pinnatifid +, dentate +  and entire +
dissected +, repand +, sinuate +, crenate +  and dentate +
oblanceolate;oblanceolate +
much smaller +  and reduced +
2.5 cm25 mm <br />0.025 m <br /> (20 cm200 mm <br />0.2 m <br />) +
10mm;70mm +
campanulate +
branched +  and simple +
petiolate +  and sessile +
well-developed +
distinct +
crisped +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
differentiated +
emarginate +  and entire +
Tex. +  and Mexico (Coahuila) +
400-700 m +
straight +  and curved +
not winged +  and unappendaged +
zygomorphic +  and actinomorphic +
latiseptate +, stipitate +  and subsessile +
straight +
3.2cm;7.5cm +
flattened +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Talus slopes, rocky hillsides, gravelly and dry stream beds, sand flats, limestone slopes, open scrub or woodland +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
crisped;runcinate-pinnatifid;runcinate-pinnatifid +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
unequal +
Brownish (?) +, Purple (?) +, Pink (?) +, Yellow (?) +  and White (?) +
lavender +  and purple-lavender +
rudimentary +
Oblong (?) +  and Ovate (?) +
Flowering Feb–Apr. +
trinucleate +  and 3(-11)-colpate +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
elongated +
divaricate-ascending +
stout +  and slender +
1 cm10 mm <br />0.01 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
mucilaginous +
aseriate +, uniseriate +  and biseriate +
not +  and mucilaginous +
White (?) +, Black (?) +, Brown (?) +  and Yellow (?) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
orbicular +
dark purple +
persistent +  and caducous +
distinct +
not keeled +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
reduced +
latiseptate +, schizocarpic +, samaroid +  and lomentaceous +
indehiscent +  and dehiscent +
angustiseptate +, flat +, angled +, terete +, torulose +, not +, segmented +  and nutletlike +
Illustrated +  and Conservation concern +
tetradynamous +
procumbent +  and decumbent +
ascending +  and erect +
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 />) +
Agianthus +, Cartiera +, Disaccanthus +, Euklisia +, Icianthus +, Mesoreanthus +, Microsemia +, Mitophyllum +  and Pleiocardia +
Streptanthus cutleri +
Streptanthus +
species +
dendritic +  and simple +
coiled +, 1-7-veined +  and veined +
pubescent +  and glabrous +
anastomosing +
perennial +, biennial +  and annual +
subshrub +  and shrub +
aquatics +  and terrestrial +
glabrous +  and pubescent +
0.5mm;1mm +