Leaves opposite or whorled; in ours, sepals and petals usually 4, but may be 4-10, calyx joining ovary wall; stamens 4-10, on corolla-tube; ovary inferior, 2-5-celled.
Small Bluet (Houstonia patens) has violet-blue flowers which are among the first blossoms of spring. They dot golf courses and sandy meadows from Texas to Virginia and Illinois in February and March. The bluets are also called innocence and angel-eyes.
Least Bluet (Houstonia minima) is a smaller plant than the small bluet, but the flowers are a little larger and are pale pink. They bloom at the same time of year and may often be found together. The least bluet ranges from Texas to Illinois and Kansas.
The madder-family is mainly tropical but is represented in Texas by nearly forty species. Nearly all of these have inconspicuous, 4-lobed white flowers and include many bedstraws and bluets, the button-weed, and button-bush. From some members of the family valuable commercial products—coffee, quinine, and a red dye—are obtained; the cape-jasmine or gardenia is a well-known ornamental plant.
BOUVARDIA BABY’S BREATH
Baby’s Breath. Narrow-Leaved Houstonia (Houstonia angustifolia) is not the garden plant (Gypsophila paniculata) which is known as baby’s breath, but it is equally dainty. The stems grow from woody perennial roots and form erect clumps about a foot high. The small flowers are borne in flat-topped clusters and vary in color from white to pale pink or lavender. This plant is widely distributed on prairies from Illinois to Texas and Florida.
Bouvardia (Bouvardia ternifolia) is a low shrub, 2-6 ft. high, which grows in the mountains west of the Pecos River to Arizona and Mexico. The leaves are short and grow in whorls of 3’s or 4’s. The narrow, red tubular flowers are about one inch long. The Bouvardias were once popular as greenhouse plants but are little used now. This one was introduced into England more than one hundred years ago.