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 large genus of hairy-leaved plants, many with tuberous roots, and closely related to Gloxinia. The tubular flowers are glowing scarlet or orange in colour, and droop from branched stems. There are now many lovely garden hybrids, one of the best being noegelioides, with bright rosy-pink flowers having a yellow throat. There are, however, numerous variations of this, including some with flowers of deep-violet, red, lilac, white, pink, and other shades. At present there is no great trade done in these lovely plants. They are easily raised from seeds, and may be treated in the same way as Gloxinias.