About Streptanthus coulteri A.Gray
Streptanthus coulteri (also referred to as Caulanthus coulteri) is an annual herb that grows between 100 and 1600 millimeters (4 to 63 inches) tall. It produces a slender, branching stem lined with generally lance-shaped leaves, which can have edges ranging from smooth to sharply sawtoothed. Its widely spaced flowers are somewhat bullet-shaped, covered by pouched sepals. The sepals are bright to deep purple when new, and fade to yellow-green as they age. When the sepals open, they reveal dark-veined petal tips with wavy margins. The fruit is a long, thin silique that may reach up to 13 centimeters (5.1 inches) in length.