Ericameria nauseosa var. psilocarpa

(S. F. Blake) G. L. Nesom & G. I. Baird

Phytologia 75: 87. 1993.

Common names: Smooth-fruit rabbitbrush
EndemicConservation concern
Basionym: Chrysothamnus nauseosus var. psilocarpus S. F. Blake J. Wash. Acad. Sci. 27: 376. 1937
Synonyms: Chrysothamnus nauseosus subsp. psilocarpus (S. F. Blake) L. C. Anderson
Treatment appears in FNA Volume 20. Treatment on page 68. Mentioned on page 63.

Plants 30–50 cm. Stems yellowish green, leafy, compactly tomentose. Leaves yellowish green; blades 1-nerved, narrowly oblanceolate, 30–70 × 1–2 mm, faces glabrate. Involucres 8.5–12.2 mm. Phyllaries 15–18, apices erect, acute or acuminate to cuspidate, abaxial faces glabrous. Corollas 8.6–9.6 mm, tubes sparsely hairy, lobes 1.3–1.5 mm, glabrous; style appendages slightly longer than stigmatic portions. Cypselae glabrous; pappi 6.8–9.1 mm. 2n = 18.


Phenology: Flowering later summer–fall.
Habitat: Sagebrush and Elymus salinus communities
Elevation: 1900–2300 m

Discussion

Of conservation concern.

Variety psilocarpa is apparently restricted to Carbon, Duchesne, Emery, and Wasatch counties in east-central Utah.

L. C. Anderson (1986b) excluded the name Ericameria nauseosa var. glareosa (M. E. Jones) G. L. Nesom & G. I. Baird [as Chrysothamnus nauseosus subsp. glareosus (M. E. Jones) H. M. Hall & Clements], because he had seen no herbarium or field material. Jones’s original description is sketchy; he mentioned its similarity to subsp. leiosperma. S. L. Welsh et al. (1987) noted the uncertain disposition of this taxon. A. Cronquist (1994) recognized C. nauseosus var. glareosus (M. E. Jones) H. M. Hall and placed C. nauseosus var. psilocarpus in synonymy, noting that it was equal to E. nauseosa var. glareosa (M. E. Jones) G. L. Nesom & G. I. Baird. Without more substantial documentation, use of var. psilocarpa is preferred over var. glareosa, which we take to be of uncertain application.

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 +
(S. F. Blake) G. L. Nesom & G. I. Baird +
decurrent +
Chrysothamnus nauseosus var. psilocarpus +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
oblanceolate +
1mm;2mm +
rugulose +  and muricate +
tan +  and reddish +
subequal +
Smooth-fruit rabbitbrush +
not 2-lipped +  and actinomorphic +
0.86 cm8.6 mm <br />0.0086 m <br /> (0.96 cm9.6 mm <br />0.0096 m <br />) +
turbinate +  and cylindric or oblanceoloid +
fertile +  and bisexual +
fertile +  and bisexual +
1900–2300 m +
resinous +
gland-dotted +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sagebrush and Elymus salinus 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 +
0.85 cm8.5 mm <br />0.0085 m <br /> (1.22 cm12.2 mm <br />0.0122 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 +
0.68 cm6.8 mm <br />0.0068 m <br /> (0.91 cm9.1 mm <br />0.0091 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering later 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 +
Endemic +  and Conservation concern +
resinous +
yellowish green +
ascending +  and spreading +
lanceolate +  and subulate +
appendaged +  and truncate +
papillate +  and smooth +
Chrysothamnus nauseosus subsp. psilocarpus +
Ericameria nauseosa var. psilocarpa +
Ericameria nauseosa +
variety +
campanulate +
perennial +, biennial +  and annual +