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Coulter's brickellbush

Photo is of parent taxon
Habit Shrubs, 30–150 cm.
Stems

much branched from bases, pubescent, often gland-dotted.

Leaves

opposite;

petioles 4–12 mm;

blades 3-nerved from bases, broadly ovate to deltate, 10–60 × 10–30 mm, bases truncate, hastate, or subcordate, margins usually toothed (1–3 sets of sharp teeth near bases), rarely subentire, apices attenuate, faces minutely pubescent.

blades 20–60 × 10–30 mm, midstem blades mostly 40–60 mm.

Peduncles

5–40 mm, pubescent and sometimes gland-dotted.

mostly 15–40 mm, mostly glandular-pubescent.

Involucres

cylindric to campanulate, 8–12 mm.

Florets

13–25;

corollas pale yellow-green, often purple-tinged, 7–8.2 mm.

Phyllaries

17–22 in 4–6 series, greenish, often purple-tinged, 4–5-striate, unequal, margins scarious (apices acute to acuminate or mucronate, minutely pubescent);

outer lance-ovate to narrowly lanceolate (glabrous or sparsely pubescent), inner narrowly lanceolate to linear (glabrous).

Heads

in loose, paniculiform arrays.

Cypselae

3–5 mm, hispidulous, strigose, or glandular-pubescent;

pappi of 28–40 smooth or barbellulate bristles.

2n

= 18.

Brickellia coulteri

Brickellia coulteri var. coulteri

Phenology Flowering Mar–Oct.
Habitat Open sandy areas, arid rocky slopes, desert canyons
Elevation 10–1000 m (0–3300 ft)
Distribution
from FNA
AZ; NM; TX; n Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; TX; Mexico
[BONAP county map]
Discussion

Varieties 3 (2 in the flora}.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Midstem leaf blades mostly 40–60 mm; peduncles mostly 15–40 mm, mostly glandular-pubescent
var. coulteri
1. Midstem leaf blades mostly 20–40(–50) mm; peduncles 5–25 mm, pubescent, mostly lacking glandular hairs
var. brachiata
Source FNA vol. 21, p. 496. FNA vol. 21, p. 497.
Parent taxa Asteraceae > tribe Eupatorieae > Brickellia Asteraceae > tribe Eupatorieae > Brickellia > Brickellia coulteri
Sibling taxa
B. amplexicaulis, B. atractyloides, B. baccharidea, B. betonicifolia, B. brachyphylla, B. californica, B. chenopodina, B. cordifolia, B. cylindracea, B. dentata, B. desertorum, B. eupatorioides, B. floribunda, B. frutescens, B. grandiflora, B. greenei, B. hinckleyi, B. incana, B. knappiana, B. laciniata, B. lemmonii, B. longifolia, B. microphylla, B. nevinii, B. oblongifolia, B. parvula, B. pringlei, B. rusbyi, B. simplex, B. venosa, B. veronicifolia
B. coulteri var. brachiata
Subordinate taxa
B. coulteri var. brachiata, B. coulteri var. coulteri
Name authority A. Gray: Smithsonian Contr. Knowl. 3(5): 86. (1852) unknown
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