|Scientific Name||Grusonia aggeria (Opuntia aggeria)||USDA PLANTS Symbol||GRAG3|
|Common Name||Clumped Dog Cholla, Jumping Dog Cholla||ITIS Taxonomic Serial No.||907938|
|Description|| Habitat: Desert environment; gravelly to silty soils in flats and slopes in Chihuahua Desert (Big Bend area) from 1800 to 3500 ft.
Plant: Low, mat-forming cactus, less than 4 inches tall; more-or-less cylindrical stems, narrower at base; stems prostrate around edges and upright near the center; firm joints.
Spines: Central spines (3 to 4) usually grayish-white, may be reddish-brown, 1-1/4 to 3-1/2 inches long, longer ones often twisted or curved; radial spines (2 to 4) grayish-white, 1/4 to 1 inch long, bent downwards.
Inflorescence: Bright yellow flowers opening around noon for a single day; 1-1/2 to 2 inches wide and 2 to 2-3/4 inches long; yellow-orange to reddish filaments, yellow to cream anthers, cream-colored style and pale-green/yellow stigma lobes.
Bloom Period: March to May.
Fruit: Pale yellow, aging to gray, spineless, cylindric to ellipsoid, 3/4 to 1 inch long.
References: "Little Big Bend" by Roy Morey, "Cacti of Texas" by Powell, Weedin and Powell and SEINet.
|BONAP Distribution Map
Map Color Key
Banner photo of Lupinus ssp. by Rick Capozza, Austin TX
© Tom Lebsack 2023