These bi-articular muscles cross the hip, being attached to the ischiac tuberosity of the pelvis (Batterman et al. 2011), and also cross the knee, being attached to the tibia and fibula, although
other insertion points have also been reported (Tubbs et al. 2006).
Plant two feet or upwards in height, more erect and less branched than
other varieties, and much stained with purple at the intersection of the branches and at the
insertion of the leaf - stems; leaves of medium size, or small, long, and sharply
pointed; leaf - stems long, deep - green; flowers white, tipped with purple, about three - fourths of an inch in diameter; flower - stems long, purple.