Ericameria nauseosa var. nana

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

Phytologia 75: 87. 1993.

Common names: Dwarf rabbitbrush
Endemic
Basionym: Chrysothamnus nauseosus var. nanus Cronquist in C. L. Hitchcock et al., Vasc. Pl. Pacif. N.W. 5: 129. 1955
Synonyms: Chrysothamnus nauseosus subsp. nanus (Cronquist) D. D. Keck
Treatment appears in FNA Volume 20. Treatment on page 67. Mentioned on page 63.

Plants 10–30 cm. Stems whitish, leafy, loosely tomentose. Leaves dark green to grayish; blades 1-nerved, filiform to linear, 30–40 × 1–3 mm, faces compactly tomentose. Involucres 8–13 mm. Phyllaries 14–18, apices erect, acute to obtuse, outer abaxial faces sparsely tomentose, inner glabrous. Corollas 7.5–10 mm, tubes glabrous or moderately hairy, lobes 1.6–2.5 mm, glabrous; style appendages shorter than stigmatic portions. Cypselae densely hairy; pappi 5.2–9 mm. 2n = 18.


Phenology: Flowering late summer–fall.
Habitat: Dry, rocky ridges and cliffs
Elevation: 1200–2000 m

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 +
(Cronquist) G. L. Nesom & G. I. Baird +
decurrent +
Chrysothamnus nauseosus var. nanus +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
filiform;linear +
1mm;3mm +
rugulose +  and muricate +
tan +  and reddish +
subequal +
Dwarf rabbitbrush +
not 2-lipped +  and actinomorphic +
0.75 cm7.5 mm <br />0.0075 m <br /> (1 cm10 mm <br />0.01 m <br />) +
turbinate +  and cylindric or oblanceoloid +
fertile +  and bisexual +
fertile +  and bisexual +
Idaho +, Oreg. +  and Wash. +
1200–2000 m +
resinous +
gland-dotted +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Dry, rocky ridges and cliffs +
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 +
0.8 cm8 mm <br />0.008 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
sessile +  and petiolate +
dark green +  and grayish +
erect;spreading or reflexed +
deltate +  and triangular +
raised +  and evident +
glabrous +  and tomentose +
2-carpellate +
persistent +
0.52 cm5.2 mm <br />0.0052 m <br /> (0.9 cm9 mm <br />0.009 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 subsp. nanus +
Ericameria nauseosa var. nana +
Ericameria nauseosa +
variety +
campanulate +
hairy +  and glabrous +
perennial +, biennial +  and annual +