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American tarwort, tarbush

Habit Shrubs to 100(–200) cm.
Leaf

blades elliptic to ovate, 10–25(–40+) × 4–15(–20) mm (margins sometimes undulate).

Ray florets

0.

Disc florets

10–25(–40);

corollas 3–4 mm.

Cypselae

4–6.5 mm;

pappi 2.5–3.5 mm.

2n

= 36.

Flourensia cernua

Phenology Flowering mostly Sep–Nov.
Habitat Limestone or alkaline or clay soils, gravelly sites, desert scrub
Elevation 800–2000+ m [2600–6600+ ft]
Discussion

Plants of Flourensia cernua usually have a tarry odor and are often locally co-dominant with Larrea tridentata throughout much of the Chihuahuan Desert.

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

Distribution
from FNA
AZ; NM; TX; Mexico
[WildflowerSearch map]
[BONAP county map]
Parent taxa Asteraceae > tribe Heliantheae > subtribe Ecliptinae > Flourensia
Sibling taxa
F. pringlei
Name authority de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 593. (1836)
Source Flora of North America vol. 21, p. 118.
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