10 deg C/50 deg F
The common name of these plants is an apt one. as theare borne like the spokes of an umbrella at the top of a stout, long . They are also aquatic plants, making them ideal for anyone too generous with the -can – a frequent cause of houseplant failure. Two species are common as house-plants. both native to warm countries-(.’. altermfolius and C. dijfusiis; the latter is usually taller. They are best grown with their standing in a shallow pan of water, something that must never he done with the majority of houseplants. To keep the water fresh it should be changed daily.
Whenthem, it is a good idea to include some small pieces of charcoal with the , to keep it fresh. This lessens the risk of unpleasant smells which may arise when wet becomes sour. However, these plants are adapted to thrive in rather mucky bogs. Like most aquatic plants, they can become rampant and invasive. If this happens, they can be reduced in size by division of the . They can also be grown from .
These plants are especially useful for placing inneeding higher . The are brownish spike-lets borne at the tops of the umbrella formation.
The impressive C. papyrus, the famous Egyptian paper-rush, is sometimes seen as a houseplant where there is space toits grandeur. It is extremely from , and from a spring plants at least 90cm (3ft) in height can be obtained by the end of summer. The tall have, at the top. a dense cluster of thin foliage, and the plants can be placed by doors or near picture-windows where there is plenty of light. Because of their size it is not usually practical to grow them during winter.
plants are not often attacked by pests, but red spider mites should be watched for. They should be suspected if there is any sign of yellowing of the upper foliage and it is very important to take prompt action. During summer. spray the foliage with water in an upward direction.