Ericameria nauseosa var. leiosperma

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

Phytologia 75: 86. 1993.

Common names: Smooth-fruit rabbitbrush
Endemic
Basionym: Bigelowia leiosperma A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(2): 139. 1884 (as Bigelovia)
Synonyms: Chrysothamnus nauseosus subsp. leiospermus (A. Gray) H. M. Hall & Clements
Treatment appears in FNA Volume 20. Treatment on page 66. Mentioned on page 63, 68.

Plants 25–60 cm. Stems yellowish green, often leafless at flowering, densely, compactly tomentose. Leaves yellowish green; blades 1-nerved, filiform, 10–30 × 0.8–1 mm, faces glabrate. Involucres 8–11.5 mm. Phyllaries 17–31, apices erect, acute to obtuse, abaxial faces glabrous. Corollas 5–8.5 mm, tubes mostly glabrous, lobes 0.5–1.1 mm (erect to incurved), glabrous; style appendages longer than stigmatic portions. Cypselae glabrous; pappi 3–6.6 mm. 2n = 18.


Phenology: Flowering late summer–fall.
Habitat: Gravelly and sandy soils, rocky crevices
Elevation: 700–2800 m

Distribution

V20-110-distribution-map.gif

Ariz., Calif., Colo., Nev., 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 leiosperma +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
filiform +
0.8mm;1mm +
rugulose +  and muricate +
tan +  and reddish +
subequal +
Smooth-fruit rabbitbrush +
not 2-lipped +  and actinomorphic +
0.5 cm5 mm <br />0.005 m <br /> (0.85 cm8.5 mm <br />0.0085 m <br />) +
turbinate +  and cylindric or oblanceoloid +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Calif. +, Colo. +, Nev. +  and Utah. +
700–2800 m +
resinous +
gland-dotted +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Gravelly and sandy soils, rocky crevices +
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 /> (1.15 cm11.5 mm <br />0.0115 m <br />) +
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 +
0.3 cm3 mm <br />0.003 m <br /> (0.66 cm6.6 mm <br />0.0066 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 +
yellowish green +
ascending +  and spreading +
lanceolate +  and subulate +
appendaged +  and truncate +
papillate +  and smooth +
Chrysothamnus nauseosus subsp. leiospermus +
Ericameria nauseosa var. leiosperma +
Ericameria nauseosa +
variety +
campanulate +
perennial +, biennial +  and annual +