Category / Silphium

Silphium integrifolium (Wholeleaf Rosinweed) is a coarse perennial with erect stems sparsely clad with pairs of rough, oval to lance-shaped, medium green leaves, 6 in. long (15 cm). Blooming for 4-8 weeks…

Slow-growing, long-lived and eye-catching, Silphium laciniatum (Compass Plant) is a tall, coarse perennial with stiff and sturdy, erect, hairy stems adorned with brilliant yellow daisy flowers, 5 in. across (12 cm), scattered…

Very architectural, Silphium perfoliatum (Cup Plant) is an upright perennial with tall, sturdy, squarish stems clad with paired, oval leaves joined around the stem to form a small cup that holds water…

Noted for its spectacular foliage and profuse blooms, Silphium terebinthinaceum (Prairie Dock) is a tall herbaceous perennial forming a basal rosette of huge, oblong to heart-shaped, dark green leaves, up to 2…