Ruellias have opposite leaves and flaring, bell-shaped flowers with five shallow lobes. Beyond their hardiness range, they are commonly grown in greenhouses.Ruellia brittoniana
This shrubby perennial is a Mexican native that has naturalized in many areas of the southern and southwestern U.S. Grows to 3 ft. high and initially 1–1 1/2 ft. wide, but can be invasive and should be contained (by an edging, for example). Narrow dark green leaves to 3 in. long, 3/4 in. wide; 2-in.-long, lavender-blue flowers throughout the warm times of year. ‘Chi Chi’ has soft pink blossoms. ‘Katie’ is a dwarf (10–12 in.), noninvasive variety. ‘Blanca’ (white flowers) and ‘Rosa’ (pink flowers) have narrow leaves and grow to about 1 ft. high. Regular water.
Fast grower to 40–60 ft. tall, 20 ft. wide. Has pendulous gray-green branches.
Native primarily to Australia. At first glance, these look something like pines; their thin, join...
Fast-growing tree to 50–60 ft. (rarely 100 ft.) tall. Young trees are symmetrical and pyramidal....