Glandularia bipinnatifida (Nutt.) Nutt. var. ciliata (Benth.) B.L. Turner
Glandularia bipinnatifida (Nutt.) Nutt. var. brevispicata Umber
Glandularia wrightii (A. Gray) Umber
Verbena ambrosiifolia Rydb. ex Small
Verbena bipinnatifida Nutt. var. brevispicata (Umber) Moldenke
Verbena bipinnatifida Nutt. var. latilobata L.M. Perry
Verbena ciliata Benth.
Verbena ciliata Benth. var. pubera (Greene) L.M. Perry
Verbena pubera Greene
Verbena wrightii A. Gray
Dakota verbena is native to the American southwest. It appears in fields, grasses, and scrublands.
Plants: Plants are annuals or short-lived perennials, 4-16" (10-40 cm) tall. They are variable, sometimes low and matted, sometimes taller. They may cover wide expanses of ground. Stems are branched and ribbed, and purple or green; and both stems and leaves are hairy.
Leaves: Opposite, twice pinnate, thick, dark or gray green, hairy, up to 2½" (6.3 cm) long. (Technically the leaves are pinnatifid, that is, the divisions don’t reach all the way to midveins.) Leaves are rolled under, and have deep veins.
Flowers: Rounded, almost spherical clusters of pink, lavendar, or purple flowers, about 2" (5 cm) around. Each flower has five notched petals and a thin tubular throat (the corolla) up to ½" (1.5 cm) long. The calyx of each flower in this variety is densely covered with glandular hairs, while G. bipinnatifida var. bipinnatifida lacks glands. They appear from February to October.
Fruits: Four nutlets, each ¹/₁₆-⅛" (2-3 mm) long.
Glandularia bipinnatifida var. ciliata on www.americansouthwest.net
Glandularia bipinnatifida at Southeastern Arizona Wildflowers and the Plants of the Sonoran Desert
Glandularia bipinnatifida at the Lady Bird Johnson Wildflower Center
Glandularia bipinnatifida on texas.wildflowersightings.org
Glandularia bipinnatifida on npsot.org
Glandularia bipinnatifida on SEINet—the Southwest Environmental Information Network
Glandularia bipinnatifida var. ciliata description by Thomas H. Kent, last updated 25 May 2020.