''Chrysothamnus eremobius'', the Pintwater rabbitbrush , is a rare

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...

n species of flowering plants in the tribe

Astereae Astereae is a tribe of plants in the family Asteraceae that includes annuals, biennials, perennials, subshrubs, shrubs, and trees. They are found primarily in temperate regions of the world. Plants within the tribe are present nearly worldwide di ...

within the family

Asteraceae The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...

. It has been found only in the Pintwater and

Sheep Range The Sheep Range is located north of Las Vegas, Nevada in the United States. It is found in both Clark and Lincoln Counties in the Desert National Wildlife Refuge. The mountains reach a peak at Hayford Peak, above sea level between the Las Vegas ...

s of

Clark Clark is an English language surname, ultimately derived from the Latin with historical links to England, Scotland, and Ireland ''clericus'' meaning "scribe", "secretary" or a scholar within a religious order, referring to someone who was educate ...

and Lincoln Counties in southern

Nevada Nevada ( ; ) is a U.S. state, state in the Western United States, Western region of the United States. It is bordered by Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. N ...

. ''Chrysothamnus eremobius'' is a branching shrub up to 30 cm (12 inches) tall. It produces large, dense arrays of small yellow

flower heads A pseudanthium (Greek for "false flower"; ) is an inflorescence that resembles a flower. The word is sometimes used for other structures that are neither a true flower nor a true inflorescence. Examples of pseudanthia include flower heads, compos ...

, each with

disc floret The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...

s but no

ray florets The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...

. It grows in the crevices of limestone cliffs.Flora of North America, Pintwater rabbitbrush, ''Chrysothamnus eremobius'' L. C. Anderson
/ref>

References

External links

photo of herbarium specimen at Missouri Botanical Garden, collected in Clark County, Nevada, isotype of ''Chrysothamnus eremobius''
{{Taxonbar, from=Q15593802 Astereae Flora of Nevada Endemic flora of the United States Clark County, Nevada Lincoln County, Nevada Plants described in 1983