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Horstrissea dolinicola, a New Genus and Species of Umbels (Umbelliferae, Apiaceae) from Kriti (Greece)
Bernhard Egli, Pedro Gerstberger, Werner Greuter and Horst Risse
Bd. 19, H. 2 (Apr. 23, 1990), pp. 389-399
Published by: Botanischer Garten und Botanisches Museum, Berlin-Dahlem
Stable URL: http://www.jstor.org/stable/3996647
Page Count: 11
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A new species of umbels, belonging to an undescribed new genus, was discovered in two neighbouring dolines of the Psiloritis mountain range in central Kriti, at an altitude of c. 1500 m. It is a highly specialized plant, whose most unusual feature is leaf development: the ultimate portions of the tritemate basal leaves emerge individually on the surface of the sandy ground, being borne on long, flexuous subterranean petioles and petiolules. The new species is fully described and illustrated, and its ecology is outlined. The relationships of the new genus are discussed. It belongs to the Apieae (=Ammieae) but is probably closest to Scaligeria, a genus hitherto misplaced in the Smyrnieae, which it resembles in its geophytic habit and in fruit structure. The chromosome number 2n = 14 was counted for Horstrissea. The basis x = 7 is unusual in the Umbelliferae and has so far been reported only once in a potentially allied genus, Bunium, where it is considered as derived through descending aneuploidy from the primitive x = 11.
Willdenowia © 1990 Botanischer Garten und Botanisches Museum, Berlin-Dahlem