Abstract
Serapias perez-chiscanoi has a stable and uniform appearance with green flowers. Throughout its distribution area, however, plants have been found with deviant pink to red flowers that show similarities with other taxa that are occasionally pale flowered. S. perez-chiscanoi is easy to differentiate from S. cordigera subsp. cordigera by the colour of the flowers (S. cordigera subsp. cordigera has red to purple flowers) and the fact that the hypochile dimensions of S. perez-chiscanoi are significantly smaller. It is, however, more difficult to distinguish it from individuals of S. cordigera subsp. gentilii with pale flowers, which occur frequently. The two taxa differ in colour pattern and floral dimensions, especially the hypochile length, which is shorter in S. perez-chiscanoi. Pale-flowered individuals of another species, S. parviflora, are easily distinguished by their significantly smaller flowers. S. perez-chiscanoi occurs in Spain in the autonomous regions of Extremadura and Castilla-La Mancha and in Portugal, S. cordigera subsp. gentilii seems to occur along the coastal regions of SW Portugal, while S. cordigera subsp. cordigera and S. parviflora are distributed throughout the Iberian Peninsula.
Highlights
In 1976 Jose Luis Pérez Chiscano discovered deviant Serapias plants along the Guadiana river basin in Extremadura (Spain)
Pérez Chiscano & al. (1991) reported that only some eight populations of this species were known, all located in the Guadiana river basin in Extremadura
One new aspect is that plants with deviant reddish flower colours were found among the “normal” S. perez-chiscanoi individuals that have pale green flowers, or pale green flowers with a red venation
Summary
In 1976 Jose Luis Pérez Chiscano discovered deviant Serapias plants along the Guadiana river basin in Extremadura (Spain). Serapias perez-chiscanoi se localiza en España en las comunidades autónomas de Extremadura y Castilla-La Mancha y en Portugal, S. cordigera subsp. We describe the variation in flower colour in S. perez-chiscanoi and the differences and similarities in morphology and geographic distribution with other Serapias taxa.
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