There are very few, if any, double varieties, but some varieties are curious and interesting from the duplication of the calyx or-corolla; these are popularly known as "hose-in-hose" Polyanthus.
The Polyanthus - Though the origin of this beautiful old-fashioned flower is somewhat obscure, it is considered to be a form of the common P. vulgaris with the stems developed.
The Polyanthus may easily be raised from seed, which should be sown as soon as ripe, say about the end of June.
The polyanthus or bunch narcissi form another well-marked group, whose peculiarity of producing many flowers on the stem is indicated by the name.
Compound definite inflorescences are by no means common, but in Streptocarpus polyanthus and in several calceolarias we probably have examples.
Streptocarpus polyanthus, many Calceolarias.