Ericameria nauseosa var. mohavensis

(Greene) G. L. Nesom & G. I. Baird

Phytologia 75: 87. 1993.

Common names: Mojave rabbitbrush
Endemic
Basionym: Bigelowia mohavensis Greene in A. Gray et al., Syn. Fl. N. Amer. 1(2): 138. 1884 (as Bigelovia)
Synonyms: Chrysothamnus nauseosus var. mohavensis (Greene) H. M. Hall
Treatment appears in FNA Volume 20. Treatment on page 66. Mentioned on page 63, 68.

Plants 60–80 cm. Stems white to yellowish green, nearly leafless at flowering, densely tomentose. Leaves yellowish green; blades 1-nerved, filiform, 10–30 × 0.5–1.5 mm, faces glabrate. Involucres 8.5–12. Phyllaries 20–26, apices erect, acute, abaxial faces tomentose to glabrate. Corollas 7–10.9 mm, tubes puberulent, lobes 0.9–2 mm, glabrous; style appendages longer than stigmatic portions. Cypselae densely hairy; pappi 6.3–9.8 mm. 2n = 18.


Phenology: Flowering late summer–fall.
Habitat: Dry scrub Artemisia, pinyon, Atriplex, Joshua tree communities
Elevation: 400–2400 m

Discussion

Variety mohavensis may intergrade with vars. hololeuca and oreophila. It grows in southern Nevada and southern California.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

tomentose +  and glabrate +
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
rounded +  and flat-topped +
Lowell E. Urbatsch +, Loran C. Anderson +, Roland P. Roberts +  and Kurt M. Neubig +
(Greene) G. L. Nesom & G. I. Baird +
decurrent +
Bigelowia mohavensis +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
filiform +
0.5mm;1.5mm +
rugulose +  and muricate +
tan +  and reddish +
subequal +
Mojave rabbitbrush +
not 2-lipped +  and actinomorphic +
0.7 cm7 mm <br />0.007 m <br /> (1.09 cm10.9 mm <br />0.0109 m <br />) +
turbinate +  and cylindric or oblanceoloid +
fertile +  and bisexual +
fertile +  and bisexual +
Calif. +  and Nev. +
400–2400 m +
resinous +
gland-dotted +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Dry scrub Artemisia, pinyon, Atriplex, Joshua tree communities +
thyrsiform +, paniculiform +, branched +, racemiform +, cymiform +, discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
obconic;subcylindric +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
sessile +  and petiolate +
yellowish green +
erect;spreading or reflexed +
deltate +  and triangular +
raised +  and evident +
2-carpellate +
persistent +
0.63 cm6.3 mm <br />0.0063 m <br /> (0.98 cm9.8 mm <br />0.0098 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering late summer–fall. +
0.15 cm1.5 mm <br />0.0015 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
ovate +  and lanceolate +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
resinous +
white +  and yellowish green +
ascending +  and spreading +
lanceolate +  and subulate +
appendaged +  and truncate +
papillate +  and smooth +
Chrysothamnus nauseosus var. mohavensis +
Ericameria nauseosa var. mohavensis +
Ericameria nauseosa +
variety +
campanulate +
puberulent +
perennial +, biennial +  and annual +