Disa purpurascens
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Disa purpurascens is a species of orchid found in South Africa (SW. Cape Prov.). It is also known as the early blue disa or the bloumoederkappie.
Description
Plants are Script error: No such module "convert". tall, growing from a tuber with a length of about Script error: No such module "convert". and a diameter of about Script error: No such module "convert".. About 10 narrow, rigid leaves, about half as tall as the plant, grow from a basal rosette. The base of the plant is often surrounded by a sheath of old leaf fibers.[1]
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This species flowers in October and November, producing an inflorescence of 1–7 sweetly scented flowers. Each flower has a blue hood and side wings, with a dark purple lip below. Yellow-green petals are found at the back of the hood.[2] While the flowers look similar to those of Disa graminifolia, they differ in having an upcurved lip margin and a conical spur. They also flower at different times of the year.[3]
While there is generally very little variation between plants, some white flowers have been observed. This has been suggested to be a recessive condition.[1]
Distribution
This species has a fairly narrow distribution, growing in coastal regions between Cape Hangklip and Cape Agulhas. It is not thought to occur above Script error: No such module "convert". above sea level.[1]
References
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