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Greene's rabbitbrush

Habit Shrubs, 10–50 cm; with woody, moderately branched caudices, bark light gray, flaky to fibrous with age.
Stems

ascending, green becoming tan, glabrous, resinous.

Leaves

ascending to spreading;

sessile;

blades with faint midnerves, linear-filiform, 10–40 × 0.5–2 mm, flat or sulcate, sometimes twisted, margins glabrous or hirtellous, apices acute to apiculate, faces glabrous.

Involucres

cylindric to turbinate, 5–8 × 1.5–2.5 mm.

Disc florets

4–5;

corollas 3.7–5.5 mm, lobes 0.8–1.5 mm;

style branches 2–2.4 mm (exserted beyond spreading corolla lobes), appendages 0.5–0.8 mm (shorter than stigmatic portion).

Phyllaries

15–20 in 3–4 series, often in vertical ranks or spirals, mostly tan, ± greenish apically, midveins rarely visible, ovate or oblong to elliptic, 1.5–5 × 0.8–1.4 mm, unequal, mostly chartaceous, sometimes ± keeled, apices acuminate to cuspidate (cusp often recurved or falcate), faces glabrous or with a few long, crooked hairs proximally and near margins, resinous.

Heads

in densely cymiform arrays (4 cm wide), distal leaves reaching into but not overtopping arrays.

Cypselae

reddish brown, turbinate, 3–4 mm, faces densely hairy;

pappi tan, 3.7–5 mm.

2n

= 18.

Chrysothamnus greenei

Phenology Flowering summer–fall.
Habitat Sandy washes, dry open places in desert
Elevation 1300–2000 m (4300–6600 ft)
Distribution
from FNA
AZ; CA; CO; NM; NV; UT; WY
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 20, p. 189.
Parent taxa Asteraceae > tribe Astereae > Chrysothamnus
Sibling taxa
C. depressus, C. eremobius, C. humilis, C. molestus, C. scopulorum, C. stylosus, C. vaseyi, C. viscidiflorus
Synonyms Bigelowia greenei
Name authority (A. Gray) Greene: Erythea 3: 94. (1895)
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