Ericameria linearifolia |
Ericameria obovata |
|
---|---|---|
interior goldenbush, narrowleaf goldenbush |
Rydberg's goldenbush |
|
Habit | Plants 40–150 cm. | Plants 20–40 cm. |
Stems | erect to spreading, green when young, fastigiately branched, glabrous, resinous. |
erect to ascending, green, becoming tan, branched, stipitate-glandular. |
Leaves | usually ascending or spreading; blades filiform to narrowly oblanceolate (terete or flattened, adaxially sulcate to concave), 12–55 × 0.5–3 mm, midnerves evident, usually not raised, apices acute to acuminate, faces glabrous or sparsely hairy, gland-dotted (in circular, deep pits), resinous; axillary fascicles of 2–15 leaves, shorter than subtending 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 | 20–70 mm (mostly ebracteate). |
1–7 mm (stipitate-glandular). |
Involucres | hemispheric, 8–14 × 8–18 mm. |
obconic, 6–8 × 4–7 mm. |
Ray florets | 3–18; laminae elliptic to lanceolate, 7–15 × 2–5 mm. |
4–9; laminae elliptic, 3.5–6 × 1.2–1.8 mm. |
Disc florets | 16–60; corollas 6–10 mm. |
9–15; corollas 6.2–6.8 mm. |
Phyllaries | 24–32 in 2–3 series, green to tan, ovate to lanceolate, 4–10 × 0.5–3 mm, subequal, outer sometimes wholly herbaceous, usually mostly chartaceous, sometimes with green, medial stripes, midnerves conspicuous, raised, 1–2 collateral nerves often present, (margins membranous, minutely lacerate to fimbriate) apices acute to acuminate, abaxial faces usually glabrous, sometimes sparsely hairy, often stipitate-glandular, resinous. |
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 | usually borne singly. |
in cymiform to racemiform arrays (1–3 cm wide). |
Cypselae | tan to brown, narrowly oblanceoloid, somewhat flattened, 4–5 mm (2-ribbed), sericeous to villous; pappi silvery, 5.8–7 mm. |
tan to reddish brown, columnar, 3.5–4.5 mm [ribs unknown], villous; pappi tan, 4–5.5 mm. |
2n | = 18. |
= 36. |
Ericameria linearifolia |
Ericameria obovata |
|
Phenology | Flowering spring–early summer. | Flowering late summer–fall. |
Habitat | Rocky or sandy soils of mountainsides, dry creek beds, deserts, mesas, and interior plains | Open rocky soils, mostly associated with desert shrub, pinyon-juniper, and lower ponderosa pine |
Elevation | 70–2000 m (200–6600 ft) | 1500–3400 m (4900–11200 ft) |
Distribution |
AZ; CA; NM; NV; TX; UT
|
UT |
Source | FNA vol. 20, p. 61. | FNA vol. 20, p. 69. |
Parent taxa | Asteraceae > tribe Astereae > Ericameria | Asteraceae > tribe Astereae > Ericameria |
Sibling taxa | ||
Synonyms | Haplopappus linearifolius, Haplopappus linearifolius subsp. interior | Macronema obovatum, Haplopappus rydbergii, Haplopappus watsonii var. rydbergii |
Name authority | (de Candolle) Urbatsch & Wussow: Brittonia 31: 273. (1979) | (Rydberg) G. L. Nesom: Phytologia 68: 152. (1990) |
Web links |