Heterotheca grandiflora
Heterotheca jonesii
silk-grass goldenaster, telegraph weed
Jones' false goldenaster, Jones' goldenaster
1–5+, ascending to erect (strict, 0.9–1.7 cm diam., only distal lateral branches developing in larger plants), moderately to densely hispido-strigose, more so proximally, moderately to densely stipitate-glandular, more so distally.
1–50, usually decumbent, sometimes ascending (proximal parts often buried in sand) simple, moderately to densely strigose, sparsely hispid, eglandular.
basal and proximal cauline petiolate (petioles 3–7 cm, bases auriculate-clasping), blades ovate or elliptic to oblong, 50–80 × 20–30 mm, margins flat or somewhat undulate, coarsely serrate to serrulate or entire, proximally long-ciliate, apices acute, faces moderately to densely long-hispido-strigose;
distal sessile, blades oblong-lanceolate to lanceolate, 20–40 × 20–30 mm, reduced distally, margins often undulate, coarsely serrate.
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.
10–65 mm, sparsely to densely hispido-strigose, densely stipitate-glandular;
bracts 0–3, linear-lanceolate to linear, reduced distally.
3–5 mm, densely strigose, hispid hairs few;
bracts leaflike, little reduced distally.
campanulo-hemispheric, 6–9 mm.
cylindric to narrowly campanulate, 5–7 mm.
20–40;
laminae 5–8 × 1–2 mm.
7–11;
laminae 6–8.5 × 0.6–1.6 mm.
30–75;
corollas 4–6 mm, lobes 0.5–0.8 mm.
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).
in 4–6 series, linear-lanceolate, unequal, margins scarious, faces strigose, densely stipitate-glandular.
in 4–5 series, unequal (outer 1/5–1/4 length of inner), mid lanceolate, mid to distal margins anthocyanotic, moderately strigose, eglandular.
10–110+, in corymbiform arrays, becoming paniculiform with age, branches ascending, usually relatively short compared to plant height.
borne singly.
dimorphic, (ray) 2–5 mm, faces glabrous or slightly strigose on angles, (disc) 4–6 mm, faces moderately to densely strigose;
pappi 0 (ray) or (disc) stramineous to rusty brown, outer bristles 0.4–0.7 mm, inner 6–9 mm, longest weakly clavate.
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.
= 18.
= 18.
Heterotheca grandiflora
Heterotheca jonesii
Heterotheca grandiflora is common in California, rare and probably introduced in Arizona, Nevada, and Utah, and introduced in Hawaii. Rosette plants can bloom in the spring.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
