This section is from the book "Commercial Gardening Vol2", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
A beautiful Mexican climber of the Phlox family with pale-green leaflets and tendrils, and bell-shaped purplish flowers. A fairly good trade is done in young plants in spring. These are raised from the flattish, winged seeds sown in January or February, the young plants being afterwards placed in 3½-in. pots with a stake attached. They are chiefly used for climbing over arches, trellises, etc. There is a choice and more tender form having variegated leaves.