Flora of North America species comparison

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Ericameria obovata

Rydberg's goldenbush
Habit Plants 20–40 cm.
Stems

erect to ascending, green, becoming tan, branched, stipitate-glandular.
Leaves

ascending;

blades obovate to spatulate (flat), 10–30 × 4–12 mm, midnerves evident (1–2 collateral nerves sometimes present, abaxial reticulum of secondary veins often evident), (margins often undulate) apices obtuse, apiculate, faces densely stipitate-glandular;

axillary fascicules usually absent.
Peduncles

1–7 mm (stipitate-glandular).
Involucres

obconic, 6–8 × 4–7 mm.
Ray florets

4–9;

laminae elliptic, 3.5–6 × 1.2–1.8 mm.
Disc florets

9–15;

corollas 6.2–6.8 mm.
Phyllaries

22–28 in 4–6 series, tan, ovate to elliptic, 1–6 × 0.5–1.2 mm, strongly unequal, mostly chartaceous, midnerves evident, (margins narrowly membranous, entire or minutely lacerate) apices acute to acuminate, abaxial faces mostly stipitate-glandular, resinous.
Heads

in cymiform to racemiform arrays (1–3 cm wide).
Cypselae

tan to reddish brown, columnar, 3.5–4.5 mm [ribs unknown], villous;

pappi tan, 4–5.5 mm.
2n

= 36.

Ericameria obovata
Phenology Flowering late summer–fall.
Habitat Open rocky soils, mostly associated with desert shrub, pinyon-juniper, and lower ponderosa pine
Elevation 1500–3400 m (4900–11200 ft)
Distribution
from FNA
UT
[BONAP county map]
Source FNA vol. 20, p. 69.
Parent taxa Asteraceae > tribe Astereae > Ericameria
Sibling taxa
E. albida, E. arborescens, E. arizonica, E. bloomeri, E. brachylepis, E. cervina, E. compacta, E. cooperi, E. crispa, E. cuneata, E. discoidea, E. ericoides, E. fasciculata, E. gilmanii, E. greenei, E. laricifolia, E. lignumviridis, E. linearifolia, E. linearis, E. nana, E. nauseosa, E. ophitidis, E. palmeri, E. paniculata, E. parishii, E. parryi, E. pinifolia, E. resinosa, E. suffruticosa, E. teretifolia, E. watsonii, E. winwardii, E. zionis
Synonyms Macronema obovatum, Haplopappus rydbergii, Haplopappus watsonii var. rydbergii
Name authority (Rydberg) G. L. Nesom: Phytologia 68: 152. (1990)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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