Palafoxia arida

Palafoxia arida is a species of flowering plant in the aster family, known by the common names desert palafox and Spanish needle.

Palafoxia arida
Palafoxia arida var. arida (autonym)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Palafoxia
Species:	P. arida
Binomial name
Palafoxia arida B.L.Turner & M.I.Morris[1][2]

Distribution

It is native to the Mojave Desert and Sonoran Desert ecoregions of California, the Southwestern United States, and northwestern Mexico.

Description

Palafoxia arida is an annual herb producing an erect, branching, glandular stem. The rough-haired leaves are linear or lance-shaped and may exceed 10 centimeters long.

The inflorescence is an array of up to 40 flower heads. The cylindrical heads are about 2 to 3 centimeters long, lined with long, pointed phyllaries, and bearing up to 40 pink or white tubular disc florets.

The fruit is an achene over a centimeter long including the pappus.

Varieties

There are two varieties that are no longer accepted:

• Palafoxia arida var. arida — desert needle, desert palafox^[3]
• Palafoxia arida var. gigantea — giant Spanish needle; larger, reaching 2 m (6 ft 7 in) in height^[4]