Ericameria nauseosa var. texensis

(L. C. Anderson) G. L. Nesom & G. I. Baird

Phytologia 75: 88. 1993.

Common names: Texas rabbitbrush
EndemicConservation concern
Basionym: Chrysothamnus nauseosus subsp. texensis L. C. Anderson SouthW. Naturalist 25: 197, figs. 1, 2. 1980
Treatment appears in FNA Volume 20. Treatment on page 69. Mentioned on page 62.

Plants 20–40 (–50) cm. Stems whitish, leafy, loosely tomentose. Leaves grayish green; blades 1-nerved, linear, 10–35 × 1 (–1.5) mm, faces loosely tomentulose. Involucres 8–11.5 mm. Phyllaries 16–23 (outer margins ciliate), apices erect, acute to obtuse (outer) to acuminate (inner), outer abaxial faces tomentose, glabrescent. Corollas 8.4–10.9 mm, tubes glabrous or sparsely puberulent, lobes 0.6–1.3 mm, glabrous; style appendages shorter than stigmatic portions. Cypselae glabrous; pappi 5.2–7.4 mm. 2n = 18.


Phenology: Flowering fall.
Habitat: Limestone cliffs and among boulders, less common on gravel alluvium of streambeds, associated with bigtooth maple, hornbeam, madrone, and yellow pine woodlands
Elevation: 1500–2100 m

Discussion

Of conservation concern.

Variety texensis is known from the Guadalupe Mountains.

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 +
(L. C. Anderson) G. L. Nesom & G. I. Baird +
decurrent +
Chrysothamnus nauseosus subsp. texensis +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
filiform;narrowly oblanceolate +
rugulose +  and muricate +
tan +  and reddish +
subequal +
Texas rabbitbrush +
not 2-lipped +  and actinomorphic +
0.84 cm8.4 mm <br />0.0084 m <br /> (1.09 cm10.9 mm <br />0.0109 m <br />) +
turbinate +  and cylindric or oblanceoloid +
fertile +  and bisexual +
fertile +  and bisexual +
N.Mex. +  and Tex. +
1500–2100 m +
resinous +
gland-dotted +
tomentulose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Limestone cliffs and among boulders, less common on gravel alluvium of streambeds, associated with bigtooth maple, hornbeam, madrone, and yellow pine woodlands +
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 +
grayish green +
erect;spreading or reflexed +
deltate +  and triangular +
raised +  and evident +
glabrescent +  and tomentose +
2-carpellate +
persistent +
0.52 cm5.2 mm <br />0.0052 m <br /> (0.74 cm7.4 mm <br />0.0074 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering 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 +
ascending +  and spreading +
lanceolate +  and subulate +
appendaged +  and truncate +
papillate +  and smooth +
Chrysothamnus nauseosus +
Ericameria nauseosa var. texensis +
Ericameria nauseosa +
variety +
campanulate +
puberulent +  and glabrous +
perennial +, biennial +  and annual +