This genus contains about 300 species and is a member of the Artistolochiaceae (birth-wort) fmaily. Plants range from strong climber to perennails, both deciduous and evergreen, and are found throughout tropical and temperate regions. Stems are usually thick and fissured, and leaves are often heart-shaped and vary from smooth-edged to lobed. The weird, contorted, tubular flowers are mottled in shades of pink, purple, brown, and ivory; they range in size from very small to gigantic and many have an offensive odor. Insects, lured to the flowers by the strong odor, act as a medium for pollination as they become dusted with pollen while in the flower's bladder-like interior. The common name, birthwort, comes from the herbal use of some species as an aid during childbirth.
CULTIVATION
Many of the vigorous climbers are not very hardy, and they are better suited to the green-house in cooler regions. Where suitable, grow outdoors in sun or part-shade in a rich well-drained oil. Climbers require support and can be pruned in late winter. Propagate from soft-wood cuttings, division, or seed.
Top Tip
As many of these plants have malodorous flowers, and some also have leaves that give off an unpleasant odor when crushed or bruised, select a planting position away from high traffic and entertaining areas.
CULTIVATION
Many of the vigorous climbers are not very hardy, and they are better suited to the green-house in cooler regions. Where suitable, grow outdoors in sun or part-shade in a rich well-drained oil. Climbers require support and can be pruned in late winter. Propagate from soft-wood cuttings, division, or seed.
Top Tip
As many of these plants have malodorous flowers, and some also have leaves that give off an unpleasant odor when crushed or bruised, select a planting position away from high traffic and entertaining areas.
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