Heterotheca jonesii

(S. F. Blake) S. L. Welsh & N. D. Atwood

Great Basin Naturalist 35: 336. 1976.

Common names: Jones’s goldenaster
EndemicConservation concern
Basionym: Chrysopsis jonesii S. F. Blake Contr. U.S. Natl. Herb. 25: 537. 1925,
Treatment appears in FNA Volume 20. Treatment on page 248. Mentioned on page 231, 232.

Perennials, 2.3–6 cm (forming dwarf cushions); taprooted. Stems 1–50, usually decumbent, sometimes ascending (proximal parts often buried in sand) simple, moderately to densely strigose, sparsely hispid, eglandular. Leaves: proximal cauline subpetiolate, blades oblanceolate, 4.8–12.5 (–15) × 1.5–3 mm, bases cuneate, margins flat (often curling upon drying), entire, strigoso-ciliate, long-hispid proximally, apices acute, faces moderately to densely strigose, hispid hairs few; distal sessile, narrowly to broadly oblanceolate, (3.5–) 5–10 × 1.1–2.4 (–3.2) mm, little reduced distally, faces moderately to densely hispido-strigose, eglandular. Heads borne singly. Peduncles 3–5 mm, densely strigose, hispid hairs few; bracts leaflike, little reduced distally. Involucres cylindric to narrowly campanulate, 5–7 mm. Phyllaries in 4–5 series, unequal (outer 1/5–1/4 length of inner), mid lanceolate, mid to distal margins anthocyanotic, moderately strigose, eglandular. Ray-florets 7–11; laminae 6–8.5 × 0.6–1.6 mm. Disc-florets 10–21; corollas ± ampliate, 3.5–4.8 mm, throats glabrous, lobes (0.3–) 0.5–1 mm, sparsely pilose (hairs 0.1–0.3 mm). Cypselae monocarpic, obconic, compressed, 1–2.5 mm, ribs 7–10 (often brownish), faces moderately strigose; pappi off-white, outer of linear scales 0.25–0.5 mm, inner of 25–35 bristles 3.9–6.5 mm, longest weakly clavate. 2n = 18.


Phenology: Flowering Jun–Sep.
Habitat: Bare sandy or gravelly soils, sand pockets in rock crevices of cliffs, exposed Navajo and Kaiparowits sandstone formations, pine-juniper scrub and ponderosa pine woods
Elevation: 1200–2800 m

Discussion

Of conservation concern.

Heterotheca jonesii is known only from southwestern Utah. It forms dwarf cushions often partially buried in sand. Robust shoots are similar in general appearance to H. villosa var. depressa, which is stipitate-glandular and occurs in northwestern Wyoming. H. jonesii frequently occurs sympatrically with H. villosa var. scabra, a glandular, green-leaved and more robust taxon that is unlikely to be confused with it.

Selected References

None.

Lower Taxa

None.

"[" is not declared as a valid unit of measurement for this property."]" is not declared as a valid unit of measurement for this property.

... more about "Heterotheca jonesii"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
John C. Semple +
(S. F. Blake) S. L. Welsh & N. D. Atwood +
cuneate +
Chrysopsis jonesii +
compound +  and simple +
1.25 cm12.5 mm <br />0.0125 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.48 cm4.8 mm <br />0.0048 m <br /> (1.25 cm12.5 mm <br />0.0125 m <br />) +
oblanceolate +
1.5mm;3mm +
rugulose +  and muricate +
reduced +
barbellulate +  and barbellate +
0.39 cm3.9 mm <br />0.0039 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
rhizomatous +  and taprooted +
Jones’s goldenaster +
not 2-lipped +  and actinomorphic +
ampliate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
compressed +  and obconic +
fertile +  and bisexual +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
oblanceolate +
0.11 cm1.1 mm <br />0.0011 m <br /> (?) +  and 0.24 cm2.4 mm <br />0.0024 m <br /> (?) +
1200–2800 m +
strigose +  and hispido-strigose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Bare sandy or gravelly soils, sand pockets in rock crevices of cliffs, exposed Navajo and Kaiparowits sandstone formations, pine-juniper scrub and ponderosa pine woods +
paniculiform +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
tan;rusty brown +
attenuate +  and clavate +
cylindric;narrowly campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
6mm;8.5mm +
0.6mm;1.6mm +
sessile +  and petiolate +
cauline +  and basal +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
erect;spreading +
lanceolate +, triangular +  and deltate +
long-hispid +
2-carpellate +
in 3 +  and 4 series +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering Jun–Sep. +
lanceolate +  and linear-lanceolate +
ovate-oblanceolate +
Great Basin Naturalist +
bearing subulate enations +, hairy +  and bristly +
subulate;convex +
7 +  and 10 +
3 +  and 40 +
linear +  and linear-lanceolate or triangular +
0.025 cm0.25 mm <br />2.5e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
exalbuminous +
Endemic +  and Conservation concern +
eglandular +  and simple +
1 +  and 50 +
appendaged +  and truncate +
papillate +  and smooth +
Ammodia +, Chrysopsis subg. Ammodia +  and Heterotheca sect. Ammodia +
Heterotheca jonesii +
Heterotheca +
species +
60 cm600 mm <br />0.6 m <br /> (200 cm2,000 mm <br />2 m <br />) +
2.3 cm23 mm <br />0.023 m <br /> (6 cm60 mm <br />0.06 m <br />) +
tree +, shrub +  and subshrub +