Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

Home to the plants of the Sonoran, Chihuahuan and Mojave Deserts

Cirsium ochrocentrum, Yellowspine Thistle

Verbesina rothrockii, Rothrock's Crownbeard

Verbesina rothrockii, Rothrock's Crownbeard, Southwest Desert Flora Verbesina rothrockii, Rothrock's Crownbeard, Southwest Desert Flora Verbesina rothrockii, Rothrock's Crownbeard, Southwest Desert Flora Verbesina rothrockii, Rothrock's Crownbeard, Southwest Desert Flora Verbesina rothrockii, Rothrock's Crownbeard, Southwest Desert Flora


Scientific Name: Verbesina rothrockii
Common Name: Rothrock's Crownbeard
Also Called: Rothrock Crownbeard
Family: Asteraceae, Sunflower Family
Synonyms: (Verbesina longipes)
Status: Native
Duration: Perennial
Size: 2 feet
Growth Form: Forb/herb; erect slender reddish stems.
Leaves: Green, bright green; opposite, clasping, rough or like sandpaper; alternate on upper ends of stems, with prominent veins; ovate or elliptic, coarsely toothed and rough.
Flower Color: Yellow; showy golden-yellow solitary radiate heads borne on long stems or peduncles; ray flowers 8 or more, disk flowers numerous, golden colored; fruit is an achene looking similar to a flat sunflower seed.
Flowering Season: May to September.
Elevation: 3,500 to 5,500 feet.

Habitat Preferences: Rocky hillsides and slopes.

Recorded Range: Rothrock’s Crownbeard is rare in the United States where its distribution is limited to south central and south eastern Arizona and in the southwest corner of New Mexico. Rothrock’s Crownbeard is also native to northern and central Mexico.

North America & US County Distribution Map for Verbesina rothrockii.

U.S. Weed Information: No data available.
Invasive/Noxious Weed Information: No data available.
Wetland Indicator: No data available.
Threatened/Endangered Information: No data available.

Genus Information: 18 species in Verbesina throughout much of the United States and Ontario, Canada.

Comments: Rothrock’s Crownbeard is a rare sub-tropical pubescent species in the United States where its entire distribution is limited to southern Arizona and southwest New Mexico. Rothrock’s Crownbeard employs a survival strategy known as "perennating" in which a part or parts of a plant rest in a period of quietness or inactivity and cease growing under adverse conditions, drought, cold or excessive heat, with the ability to resume new growth when favorable conditions return.

In Southwest Desert Flora also see Golden Crownbeard, Verbesina encelioides.

Date Profile Completed: 07/07/2012, rev. 08/10/2012; Updated, 07/26/2015, updated format 10/11/2017
References:
U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database
Arizona Flora, Kearney, Thomas H., Peebles, Robert H., 1960, University of California Press, Berkley and Los Angeles
John L. Strother, FNA | Family List | FNA Vol. 21 | Asteraceae | Verbesina, Flora of North America Editorial Committee, eds. 1993+. Flora of North America North of Mexico. 16+ vols. New York and Oxford. (accessed 08/10/2012)
SEINet for synonyms, scientific names and recorded geographic locations, http://swbiodiversity.org/seinet/