Caulanthus flavescens

(Hooker) Payson

Ann. Missouri Bot. Gard. 9: 301. 1923.

EndemicConservation concern
Basionym: Streptanthus flavescens Hooker Icon. Pl. 1: plate 44. 1837
Synonyms: Caulanthus procerus (Brewer ex A. Gray) S. Watson Guillenia flavescens (Hooker) Greene Guillenia hookeri (Greene) Greene Streptanthus dudleyi Eastwood Streptanthus lilacinus Hoover Streptanthus procerus Brewer ex A. Gray Thelypodium flavescens S. Watson Thelypodium greenei Jepson Thelypodium hookeri Greene
Treatment appears in FNA Volume 7. Treatment on page 681. Mentioned on page 677, 678, 682.

Annuals; (not glaucous), glabrous or sparsely to moderately hirsute. Stems erect, unbranched or branched distally, 1.7–12 dm, usually hirsute basally. Basal leaves soon withered; blade lyrate, margins sinuate-pinnatifid. Cauline leaves petiolate (median 0.3–2 cm) or (distal) sessile; blade lanceolate to oblong or oblanceolate, 2–13.5 cm × 3–35 mm (smaller distally, base sometimes subauriculate), margins dentate. Racemes without a terminal cluster of sterile flowers, (considerably elongated in fruit). Fruiting pedicels ascending to strongly reflexed, (slender or thickened), 4.5–8 mm, glabrous or sparsely pubescent. Flowers: sepals usually erect, rarely ascending to spreading, oblong, 6–9 × 1.5–2 mm, (not saccate or urceolate); petals (erect), usually white to creamy white, rarely pinkish, (narrowly lanceolate), 7–13 mm, blade 3–5 × 1–1.5 mm, channeled, crisped, claw linear-oblanceolate, 4–8 × 1–1.7 mm; filaments tetradynamous, (erect), median pairs 5–7 mm, lateral pair 3–5 mm; anthers narrowly oblong, equal, 1.5–2.5 mm. Fruits erect, (straight), terete, 3.8–7.7 cm × 1.4–2 mm; valves each with obscure midvein, (glabrous or sparsely pubescent); ovules 44–58 per ovary; style 1–3.5 mm; stigma subentire. Seeds (brown), 1.3–1.8 × 0.9–1.2 mm. 2n = 28.


Phenology: Flowering Mar–May.
Habitat: Serpentine grounds, roadsides, gumbo clay slopes, open hillsides, grassy fields
Elevation: 100-800 m

Discussion

Of conservation concern.

Caulanthus flavescens is distributed primarily from Monterey and San Benito counties north to Napa and San Joaquin counties.

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 "Caulanthus flavescens"
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Ihsan A. Al-Shehbaz +
(Hooker) Payson +
not +  and rosulate +
Streptanthus flavescens +
appendaged +  and unappendaged +
not +  and auriculate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
pinnatifid +, lobed +, sinuate +  and dentate +
crisped;channeled;lanceolate;oblong or oblanceolate +
much smaller +  and reduced +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
sessile +  and petiolate +
well-developed +
distinct +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
linear-oblanceolate +
well-differentiated +
1mm;1.7mm +
emarginate +  and entire +
incumbent +  and accumbent +
obliquely +  and incumbent +
100-800 m +
straight +  and curved +
connate +  and distinct +
lateral +  and median +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
zygomorphic +  and actinomorphic +
pinkish;usually white;creamy white +
0.7 cm7 mm <br />0.007 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
latiseptate +  and sessile +
3.8 cm38 mm <br />0.038 m <br /> (7.7 cm77 mm <br />0.077 m <br />) +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Serpentine grounds, roadsides, gumbo clay slopes, open hillsides, grassy fields +
sessile +, subsessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
sinuate-pinnatifid +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
pinkish +, yellowish green +, white +, brown +  and yellow +
rudimentary +
crisped +, channeled +, linear +  and oblanceolate +
Flowering Mar–May. +
trinucleate +  and 3(-11)-colpate +
Ann. Missouri Bot. Gard. +
ascending +  and strongly reflexed +
pubescent +  and glabrous +
stout +  and slender +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
mucilaginous +
margined +  and winged +
aseriate +, uniseriate +  and biseriate +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
subglobose +, ovoid +, oblong +  and flattened +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
not basally +  and saccate +
persistent +  and caducous +
distinct +
rarely ascending +  and spreading +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
reduced +
latiseptate +, schizocarpic +, samaroid +  and lomentaceous +
indehiscent +  and dehiscent +
angustiseptate +, flat +, angled +, terete +, torulose +, not +, segmented +  and nutletlike +
Endemic +  and Conservation concern +
tetradynamous +
unequal +
branched +  and unbranched +
procumbent +  and decumbent +
not +  and capitate +
subentire +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
0.1 cm1 mm <br />0.001 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Caulanthus procerus +, Guillenia flavescens +, Guillenia hookeri +, Streptanthus dudleyi +, Streptanthus lilacinus +, Streptanthus procerus +, Thelypodium flavescens +, Thelypodium greenei +  and Thelypodium hookeri +
Caulanthus flavescens +
Caulanthus +
species +
coiled +, 1-7-veined +  and veined +
pubescent +  and glabrous +
anastomosing +
glabrous or +  and sparsely moderately hirsute +
perennial +, biennial +  and annual +
subshrub +  and shrub +
aquatics +  and terrestrial +
glabrous +  and pubescent +