Cusickiella quadricostata

(Rollins) Rollins

J. Jap. Bot. 63: 69. 1988.

EndemicConservation concern
Basionym: Draba quadricostata Rollins Contr. Dudley Herb. 3: 366. 1946
Treatment appears in FNA Volume 7. Treatment on page 414. Mentioned on page 413.

Plants subscapose; puberulent, trichomes crisped, branched, mixed with setiform ones. Stems 0.2–0.6 dm, pubescent. Basal leaves thin; blade linear to oblong, 0.2–0.5 cm × 0.5–1 (–1.5) mm, margins ciliate, (trichomes setiform, to 0.8 mm), apex acute, often apiculate, surfaces densely puberulent, trichomes minute, crisped, subdendritic, mixed with fewer setiform and simple ones; midvein obscure. Cauline leaves 1–5 (as bracts). Racemes 5–17-flowered, (bracteate basally). Fruiting pedicels 2–5 mm, glabrous or puberulent. Flowers: sepals 2.5–4 × 1–1.5 mm; petals pale-yellow, spatulate or oblanceolate, 3–4.5 × 1.5–2 mm, attenuate to clawlike base to 1 mm; filaments 2–3 mm; anthers 0.4–0.5 mm; gynophore obsolete. Fruits ovoid, 4-angled, 3–5 × 2–3 mm; valves each with prominent midvein, keeled on back, puberulent; style 0.5–1 mm. Seeds brown, 1.8–2.5 × 1–1.5 mm.


Phenology: Flowering May–Jun.
Habitat: Rocky slopes and ridges, pinyon-juniper woods, loose granitic rocks, rocky crevices and flats, dwarf sagebrush slopes
Elevation: 2400-2800 m

Discussion

Of conservation concern.

Cusickiella quadricostata is narrowly restricted in California to Mono County and in Nevada to Lyon and Mineral counties.

Selected References

None.

Lower Taxa

None.

"thin" 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 "Cusickiella quadricostata"
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Ihsan A. Al-Shehbaz +
(Rollins) Rollins +
Draba quadricostata +
appendaged +  and unappendaged +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
not +  and auriculate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
dissected +, repand +, sinuate +, crenate +  and dentate +
linear;oblong +
much smaller +  and reduced +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
sessile +, subsessile +  and petiolate +
well-developed +
indistinct +
not +  and differentiated +
emarginate +  and entire +
incumbent +  and accumbent +
obliquely +  and incumbent +
Calif. +  and Nev. +
2400-2800 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
actinomorphic +
stipitate +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
4-angled +  and ovoid +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Rocky slopes and ridges, pinyon-juniper woods, loose granitic rocks, rocky crevices and flats, dwarf sagebrush slopes +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
pinnatifid +
prominent +  and obscure +
setiform +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
pale-yellow +
3mm;4.5mm +
rudimentary +
attenuate +  and clawlike +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Flowering May–Jun. +
trinucleate +  and 3(-11)-colpate +
J. Jap. Bot. +
5-17-flowered +
puberulent +  and glabrous +
slender +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
mucilaginous +
not +  and mucilaginous +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
ovoid +  and oblong +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
persistent +  and caducous +
distinct +
spreading +, ascending +  and erect +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 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 +
procumbent +  and decumbent +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Cruciferae +
Cusickiella quadricostata +
Cusickiella +
species +
subdendritic +  and branched +
coiled +, 1-7-veined +  and veined +
anastomosing +
subscapose +  and scapose +
pubescent +  and glabrous +
perennial +, biennial +  and annual +
aquatics +  and terrestrial +