Senna phyllodinea (Silver Leaf Cassia) A fast growing evergreen medium size shrub to 5 to 6 feet tall and wide with limber branches holding distinctive flattened 2 to 3 inch long silver-gray falcate (sickle-shaped) leaves that are often two lobed near the tip and shimmer with light in the sun. Showy 3/4 inch wide yellow flowers appear in mass on branched terminal cluster in mid to late winter to early spring with interment flowering on to fall are followed by dangling papery brown seedpods that persist for months on the plant. Plant in full sun and well-drained soils.