Texas Wildbuds
Tamaulipa azurea
(Blue Boneset)
Tamaulipa azurea, Resaca de la Palma State Park, Cameron Co. 3588
Tamaulipa azurea, Resaca de la Palma State Park, Cameron Co. 3605
Tamaulipa azurea, Resaca de la Palma State Park, Cameron Co. 3590
Tamaulipa azurea, Resaca de la Palma State Park, Cameron Co. 3596
Tamaulipa azurea, Resaca de la Palma State Park, Cameron Co. 3601
| Scientific Name | Tamaulipa azurea (Eupatorium azureum) | USDA PLANTS Symbol | TAAZ |
| Common Name | Blue Boneset, Blueweed | ITIS Taxonomic Serial No. | 39490 |
| Family | Asteraceae (Sunflower) | SEINet Reference |
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| Description | Habitat: Clay or clay-loam soils in dense thickets, and shrublands, Plant: Climbing or clambering perennial shrub, much-branched stems 6 to 12 ft. long. Leaves: Opposite, sessile, deltoid, 3/4 to 2 inches long, 5/8 to 1-5/8 inches wide with pointed tips (acute or acuminate); margins are toothed (coarsely-crenate or crenate-serrate) in the upper 2/3; on petioles are 1/5 to 3/4-inch long. Inflorescence: Small rounded clusters of composite flower heads at branch tips; heads about 3/8-inch long; no ray flowers; 20 to 50 blue to lavender disk florets per head, with long, thin, protruding bluish styles; bell-shaped or conical involucre with green to purplish-green phyllaries in 3 or 4 layers. Blooming Period: February to May. References: Flora of North America and Eupatorium azureum in "Manual of the Vascular Plants of Texas" by Correll and Johnston. |
BONAP Distribution Map Map Color Key |
Texas Status: Native |
Banner photo of Castilleja indivisa and Lupinus ssp. taken along FM 1323 north of Johnson City, Blanco County
© Tom Lebsack 2026
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