Heterotheca grandiflora
Heterotheca viscida
silk-grass goldenaster, telegraph weed
cliff false goldenaster, cliff 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.
1–15+, ascending-erect (sometimes brown), appressed-strigose, mostly proximally long-hirsute, moderately to densely stipitate-glandular.
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 petiolate, blades ovate to oblanceolate, 23–51 × 5–15 mm, bases cuneate, margins entire, hispido-strigoso-ciliate (a few much longer spreading cilia near bases), apices acute to obtuse, mucronate, faces sparsely hispido-strigose, moderately to densely stipitate-glandular;
distal sessile, blades lanceolate to ovate, 10–30 × 5–12.5 mm (sometimes slightly clasping, less so distally), margins flat or only remotely undulate, apices obtuse to acute.
10–65 mm, sparsely to densely hispido-strigose, densely stipitate-glandular;
bracts 0–3, linear-lanceolate to linear, reduced distally.
10–36 mm, sparsely to moderately hispid, moderately to densely stipitate-glandular;
bracts 0–2, linear-oblanceolate, usually greatly reduced.
campanulo-hemispheric, 6–9 mm.
campanulate to hemispheric, 7.5–11 mm.
20–40;
laminae 5–8 × 1–2 mm.
9–20;
laminae 10–13 × 0.7–2.5 mm.
30–75;
corollas 4–6 mm, lobes 0.5–0.8 mm.
16–76(–98);
corollas ± ampliate, 5–7.5 mm, lobes 0.5–0.75 mm, sparsely hairy (0–0.25 mm).
in 4–6 series, linear-lanceolate, unequal, margins scarious, faces strigose, densely stipitate-glandular.
in 4–5 series, lanceolate, unequal (outer lengths 1/5–1/4 inner), margins sometimes anthocyanic apically, faces sparsely strigose, stipitate-glandular.
10–110+, in corymbiform arrays, becoming paniculiform with age, branches ascending, usually relatively short compared to plant height.
1–7, borne singly or in open, corymbiform arrays.
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.
monomorphic, obconic, compressed, 1.6–2.5 mm, ribs 4–7, faces moderately strigose;
pappi off-white, outer of linear scales 0.2–1 mm, inner of 25–40 bristles 5–7 mm, longest weakly clavate.
= 18.
= 18.
Heterotheca grandiflora
Heterotheca viscida
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.)
Heterotheca viscida grows in the mountains of southeastern Arizona, southwestern New Mexico, and trans-Pecos Texas. Plants from Texas generally have oblanceolate leaves and smaller heads and can be similar to forms of H. fulcrata var. arizonica and var. senilis. The species typically blooms earlier in the season than H. fulcrata.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
