|This is a hardy, semi-shrubby, bushy perennial, to 39" tall and 20" wide. Leaves are ovate to elliptic, serrulate, medium green, to 1 1/2" long. 'La Luna' has light yellow flowers in tall, terminal spikes, with creamy, hairy upper lips. Outstanding for mass plantings, borders, or containers. Thrives in full sun. Heat and drought tolerant. S. x jamensis is a hybrid of S. greggii and S. microphylla.