Ericameria nauseosa var. hololeuca

(A. Gray) G. L. Nesom & G. I. Baird

Phytologia 75: 86. 1993.

Common names: White rabbitbrush
Endemic
Basionym: Bigelowia graveolens var. hololeuca A. Gray Proc. Amer. Acad. Arts 8: 645. 1873 (as Bigelovia)
Synonyms: Chrysothamnus nauseosus var. hololeucus (A. Gray) H. M. Hall
Treatment appears in FNA Volume 20. Treatment on page 65. Mentioned on page 63, 66, 68.

Plants 40–120 cm (pleasantly fragrant). Stems whitish, leafy, densely to loosely tomentose. Leaves whitish; blades 1-nerved, filiform to linear, 10–35 × 1–2 mm, faces tomentose. Involucres 7–9 mm. Phyllarie 14–16, apices erect, obtuse, abaxial faces tomentose. Corollas 7–9.5 mm, tubes puberulent to cobwebby, lobes 0.5–1 mm, glabrous; style appendages shorter than stigmatic portions. Cypselae densely hairy; pappi 5.2–7.2 mm. 2n = 18.


Phenology: Flowering late summer–fall.
Habitat: Well-drained, gravelly or sandy slopes
Elevation: 100–2500 m

Distribution

V20-106-distribution-map.gif

Ariz., Calif., Idaho, Nev., N.Mex., Oreg., Utah.

Discussion

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

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 +
(A. Gray) G. L. Nesom & G. I. Baird +
decurrent +
Bigelowia graveolens var. hololeuca +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
filiform;linear +
1mm;2mm +
rugulose +  and muricate +
tan +  and reddish +
subequal +
White rabbitbrush +
not 2-lipped +  and actinomorphic +
0.7 cm7 mm <br />0.007 m <br /> (0.95 cm9.5 mm <br />0.0095 m <br />) +
turbinate +  and cylindric or oblanceoloid +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Calif. +, Idaho +, Nev. +, N.Mex. +, Oreg. +  and Utah. +
100–2500 m +
resinous +
gland-dotted +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Well-drained, gravelly or sandy slopes +
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 +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
sessile +  and petiolate +
erect;spreading or reflexed +
deltate +  and triangular +
raised +  and evident +
2-carpellate +
persistent +
0.52 cm5.2 mm <br />0.0052 m <br /> (0.72 cm7.2 mm <br />0.0072 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 +
ascending +  and spreading +
lanceolate +  and subulate +
appendaged +  and truncate +
papillate +  and smooth +
Chrysothamnus nauseosus var. hololeucus +
Ericameria nauseosa var. hololeuca +
Ericameria nauseosa +
variety +
campanulate +
puberulent +  and cobwebby +
perennial +, biennial +  and annual +