Streptanthus insignis subsp. lyonii

Kruckeberg & J. L. Morrison

Madroño 30: 234, fig. 3. 1983.

EndemicConservation concern
Treatment appears in FNA Volume 7. Treatment on page 717.

Racemes: terminal cluster of sterile flowers pale-yellow or purplish. Flowers: sepals of fertile ones greenish yellow or purplish; petals lemon yellow or yellowish white. Fruit valves moderately to densely hispid. 2n = 28.


Phenology: Flowering Apr–May.
Habitat: Serpen- tine outcrops in arid grassland, oak woodland
Elevation: 200-900 m

Discussion

Of conservation concern.

Subspecies lyonii is known from Merced County.

Kruckeberg and Morrison described subsp. lyonii based on plants with an exclusively greenish yellow terminal cluster of sterile flowers, and discussed a sympatric form with greenish yellow sepals and a purple terminal cluster as a ‘bicolor’ form. Subsequent collections show that plants with only a greenish yellow terminal sterile cluster are absent in some years, and the ‘bicolor’ form is here included in subsp. lyonii.

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.

0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
lateral +  and abaxial +
linear +  and oblong +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Ihsan A. Al-Shehbaz +
Kruckeberg & J. L. Morrison +
auriculate +
appendaged +  and unappendaged +
not +  and auriculate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
lyrate-pinnatifid +, dentate +  and entire +
dissected +, repand +, sinuate +, crenate +  and dentate +
lanceolate;lanceolate;oblanceolate +
much smaller +  and reduced +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
campanulate +
branched +  and simple +
petiolate +  and sessile +
well-developed +
distinct +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
differentiated +
emarginate +  and entire +
200-900 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
zygomorphic +  and actinomorphic +
purplish;pale-yellow +
latiseptate +, stipitate +  and subsessile +
curved +  and straight +
3.5 cm35 mm <br />0.035 m <br /> (11.4 cm114 mm <br />0.114 m <br />) +
reflexed +  and ascending +
flattened +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Serpen- tine outcrops in arid grassland, oak woodland +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
crisped;coarsely dentate;pinnatifid +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
unequal +
yellowish white +  and lemon yellow +
rudimentary +
oblong +  and ovate +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Flowering Apr–May. +
trinucleate +  and 3(-11)-colpate +
stout +  and slender +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
mucilaginous +
aseriate +, uniseriate +  and 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 />) +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
purplish +  and greenish yellow +
persistent +  and caducous +
distinct +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 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 +
branched +  and unbranched +
procumbent +  and decumbent +
ascending +  and erect +
2-lobed +  and entire +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Agianthus +, Cartiera +, Disaccanthus +, Euklisia +, Icianthus +, Mesoreanthus +, Microsemia +, Mitophyllum +  and Pleiocardia +
Streptanthus insignis subsp. lyonii +
Streptanthus insignis +
subspecies +
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 +
0.15mm;0.3mm +