Grusonia grahamii

(Graham’s Dog Cholla)


Grusonia grahamii, River Road, Big Bend National Park 4608


Grusonia grahamii, Lajitas Airport Trails, Brewster Co. 2105


Grusonia grahamii, South County Rd, Brewster Co. 1464


Grusonia grahamii, Hwy 118, Big Bend National Park 3646


Grusonia grahamii, Lajitas Airport Trails, Brewster Co. 2112

Scientific Name Grusonia grahamii (Opuntia schottii var. grahamii) USDA PLANTS Symbol GRGR6
Common Name Graham's Dog Cholla ITIS Taxonomic Serial No. 907940
Family Cactaceae (Cactus) SEINet
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Description Habitat: Desert environment; sandy, gravelly dunes, slopes and flats, 2300 to 5000 ft; Chihuahua Desert adjacent to Rio Grande.
Plant: Low, mat-forming cactus, clumps 3 to 4-1/2 inches tall and 3 to 10 ft across; more-or-less cylindrical stems, about 5/8 to 1-3/8 inches in diameter, easily broken at joints.
Spines: Central spines (4 to 7) smooth, straw-colored to brown, often pink- or red-tinged, 3/4 to 1-1/2 inches long, gray with age; radial spines (6 to 8) grayish-white, less than 1/2-inch long, bent downwards.
Inflorescence: Bright yellow flowers opening early afternoon; 2 inches wide; green to yellow filaments and anthers, cream-colored style and pale yellow-green stigma lobes.
Bloom Period: May to June.
Fruit: Yellowish, spineless, cylindric to ellipsoid, 7/8 to 1-3/8 inches long.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston, "Cacti of Texas" by Powell, Weedin and Powell and SEINet.
BONAP Distribution Map

Map Color Key
Texas Status:

Banner photo of Castilleja indivisa and Lupinus ssp. taken along FM 1323 north of Johnson City, Blanco County

© Tom Lebsack 2024