Chrysothamnus depressus |
Chrysothamnus scopulorum |
|
---|---|---|
dwarf rabbitbrush, long-flower rabbitbrush, low rabbitbrush |
Grand Canyon glowweed or evening-daisy |
|
Habit | Shrubs, 10–50 cm; woody, highly branched caudices, proximal branches decumbent, bark tan to gray, flaky with age. | Shrubs, 30–100 cm; with woody, ± wandlike, branched caudices, bark tan to gray, fairly smooth, flaky with age. |
Stems | green, becoming whitish tan, ± ridged from leaf bases, densely puberulent. |
ascending, green, becoming tan, glabrous or puberulent. |
Leaves | erect or closely ascending; sessile; blades with evident midnerves, linear to oblanceolate or narrowly oblong, 7–30 × 1.5–7 mm, flat to keeled, apices acute (often apiculate), faces glabrous or puberulent, sometimes sparsely stipitate-glandular. |
ascending to spreading; sessile; blades usually 5-nerved, linear to narrowly elliptic or lanceolate, 7–80 × 1–12 mm, flat, margins often ciliolate, apices attenuate to spinulose, faces glabrous or scabrellous. |
Involucres | obconic, 9–15 × 3–5 mm. |
obconic to subcylindric, 6.5–12 × 3–5 mm. |
Disc florets | 5–6; corollas 7–11 mm, lobes 1–2.1 mm; style branches 2.4–3.3 mm, appendages 1.5–2 mm. |
10–16(–20); corollas 5.5–8 mm, lobes 1.5–2.3 mm; style branches 2.8–3.7 mm, appendages 1.4–1.9 mm. |
Phyllaries | 20–25 in 4–6 series, in 5 strong vertical ranks, tan, often with green and/or purplish markings, midnerves evident throughout and ± expanded apically, lanceolate to elliptic, 3–8 × 0.5–1.5 mm, unequal, outer often herbaceous, inner scarious, strongly keeled, apices acute to acuminate, flat, faces puberulent. |
50–60+ in 5–6(–7) series, ± in spirals, tan, midnerves greenish to brown, raised, ± expanded apically, oblong to elliptic, 1–8.5 × 1–2 mm, unequal, mostly chartaceous, apices acute to rounded, erect, ± thickened, faces glabrous, not resinous. |
Heads | in densely cymiform arrays, not overtopped by distal leaves. |
in usually cymiform to corymbiform, rarely racemiform arrays, not overtopped by distal leaves. |
Cypselae | tan, subcylindric (tapering proximally), ± flattened, 5–6.5 mm, faces glabrous, sparsely glandular distally; pappi whitish tan, 5.5–7.5 mm. |
reddish brown, cylindric, 4–6 mm, ± 4-angled, faces hairy; pappi tan, 6–7.5 mm. |
2n | = 18. |
= 18 (as Haplopappus scopulorum). |
Chrysothamnus depressus |
Chrysothamnus scopulorum |
|
Phenology | Flowering late summer–fall. | Flowering late summer–fall. |
Habitat | Dry canyons and rocky crevices | Brushy mountain slopes, ponderosa pine communities |
Elevation | 1000–2700 m (3300–8900 ft) | 1200–2200 m (3900–7200 ft) |
Distribution |
AZ; CA; CO; NM; NV; UT
|
AZ; UT |
Source | FNA vol. 20, p. 189. | FNA vol. 20, p. 190. |
Parent taxa | Asteraceae > tribe Astereae > Chrysothamnus | Asteraceae > tribe Astereae > Chrysothamnus |
Sibling taxa | ||
Synonyms | Bigelowia menziesii var. scopulorum, Haplopappus scopulorum, Haplopappus scopulorum var. hirtellus, Hesperodoria scopulorum | |
Name authority | Nuttall: Proc. Acad. Nat. Sci. Philadelphia 4: 19. (1848) | (M. E. Jones) Urbatsch: Sida 21: 1626. (2005) |
Web links |