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Taxonomic and morphological studies in Hypecoum sect. Hypecoum (Papaveraceae)

Åslög E. Dahl
Plant Systematics and Evolution
Vol. 163, No. 3/4 (1989), pp. 227-280
Published by: Springer
Stable URL: http://www.jstor.org/stable/23673925
Page Count: 54
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Taxonomic and morphological studies in Hypecoum sect. Hypecoum (Papaveraceae)
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Abstract

Hypecoum sect. Hypecoum comprises 8 species, one with 2 additional subspecies, in the Mediterranean area and the Middle East. Five of these are recognized for the first time, viz. Hypecoum procumbens L. subsp. fragrantissimum Å. E. Dahl, H. procumbens L. subsp. atropunctatum Å. E. Dahl, H. trullatum Å. E. Dahl, H. angustilobum Å. E. Dahl and H. torulosum Å. E. Dahl. H. dimidiatum Delile and H. pseudograndiflorum Petr., which have generally been included in H. imberbe Sm., are reestablished as distinct species. Morphology and variation patterns are described and discussed with special reference to mating systems. Self-incompatibility is dominating but H. procumbens subsp. procumbens and H. torulosum are self-compatible. The broad variation ranges of the former taxon in traits presumably related to mating system (petal, anther and stigma sizes as well as pollen-ovule ratios) indicate varying rates of outcrossing. SEM micrographs are given of petal and stigma surfaces and of pollen grains. Chromosome counts are presented for seven taxa. All are diploid with 2n = 16.

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