Lithospermum cobrense, Smooththroat Stoneseed
Scientific Name: Lithospermum cobrense
Common Name: Smooththroat Stoneseed
Also Called: Smooth Pucoon and Smooththroat Gromwell
Family: Boraginaceae, Forget-Me-Not Family
Size: Up to 12 inches or more.
Growth Form: Forb/herb; erect, single or multiple stems.
Leaves: Green; basal leaves, linear, revolute (sides rolled under) matted pubescence.
Flower Color: Yellow; flowers in small clusters on tips of branches, flowering along seim-coiled inflorescence, corolla with rounded lobes, fruit a nutlet.
Flowering Season: July to August.
Elevation: 5,000 to 9,000 feet.
Habitat Preferences: Higher elevations mostly in Pine habitats.
Recorded Range: Relatively rare in the United States, Lithospermum cobrense is found in AZ, NM and TX. It is also native to northern Mexico. In Arizona, it is found in the northern and southern parts of the state but few records in Colorado River counties.
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.
Comments: The bright yellow flowers may actually be somewhat sterile with pollination coming from much smaller inconspicuous flowers (see Glossary; Cleistogamous) developing later in the season.