Chrysothamnus scopulorum |
Chrysothamnus eremobius |
|
---|---|---|
Grand Canyon glowweed or evening-daisy |
pintwater rabbitbrush |
|
Habit | Shrubs, 30–100 cm; with woody, ± wandlike, branched caudices, bark tan to gray, fairly smooth, flaky with age. | Subshrubs, 10–30 cm; with woody, highly branched caudices, bark whitish to dark gray, finely ridged, ± fibrous with age. |
Stems | ascending, green, becoming tan, glabrous or puberulent. |
erect, green becoming whitish, glabrous, ± resinous. |
Leaves | 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. |
ascending to spreading; petiolate; blades mostly 3-nerved (nerves reticulate, raised), elliptic to oblanceolate or obovate, 20–80 × (7–)10–25 mm (mostly larger basally, ± reduced distally), flat, apices acute, faces glabrous, gland-dotted. |
Involucres | obconic to subcylindric, 6.5–12 × 3–5 mm. |
cylindric to turbinate, 6.5–8.8 × 1.8–2.5 mm. |
Disc florets | 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. |
5(–6); corollas 4–5 mm, lobes 0.8–1.2 mm; style branches 2.2–2.7 mm, appendages 0.8–1.2 mm. |
Phyllaries | 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. |
19–24(–30) in 3–4 series, in vertical ranks, tan with apical green spot, midnerves evident distally, ovate to lanceolate, 1.5–6 × 0.7–1.5 mm, unequal, chartaceous, apices obtuse to acuminate, flat, faces glabrous. |
Heads | in usually cymiform to corymbiform, rarely racemiform arrays, not overtopped by distal leaves. |
in condensed, cymiform arrays, not overtopped by leaves. |
Cypselae | reddish brown, cylindric, 4–6 mm, ± 4-angled, faces hairy; pappi tan, 6–7.5 mm. |
cylindric, 2.5–3 mm, faces hairy; pappi tan, 3.1–3.9 mm. |
2n | = 18 (as Haplopappus scopulorum). |
= 18. |
Chrysothamnus scopulorum |
Chrysothamnus eremobius |
|
Phenology | Flowering late summer–fall. | Flowering late summer–fall. |
Habitat | Brushy mountain slopes, ponderosa pine communities | Crevices of limestone cliffs |
Elevation | 1200–2200 m (3900–7200 ft) | 1400–1700 m (4600–5600 ft) |
Distribution |
AZ; UT |
NV |
Discussion | Of conservation concern. Chrysothamnus eremobius is known only from the Pintwater and Sheep ranges of southern Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 20, p. 190. | FNA vol. 20, p. 189. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Bigelowia menziesii var. scopulorum, Haplopappus scopulorum, Haplopappus scopulorum var. hirtellus, Hesperodoria scopulorum | |
Name authority | (M. E. Jones) Urbatsch: Sida 21: 1626. (2005) | L. C. Anderson: Brittonia 35: 23, fig. 1. (1983) |
Web links |