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This paper provides new cytotaxonomic data on the genus    Narcissus    Linnaeus, 1753, in Algeria. Populations of seven taxa,    N.   tazetta    Linnaeus, 1753,    N.   pachybolbus    Durieu, 1847,    N.   papyraceus    Ker Gawler, 1806,    N.   elegans    (Haworth) Spach, 1846,    N.   serotinus    sensu lato Linnaeus, 1753, including    N.   obsoletus    (Haworth) Steudel, 1841, and    N.   cantabricus    De Candolle, 1815, were karyologically investigated through chromosome counting and karyotype parameters.    N.   tazetta    and    N.   elegans    have the same number of chromosomes 2 n  = 2 x  = 20 with different karyotype formulas. Karyological and morphological characteristics, confirm the specific status of    N.   pachybolbus    and    N.   papyraceus   , both are diploids with 2 n  = 22 but differing in asymmetry indices. The morphotypes corresponding to    N.   serotinus    sensu lato show two ploidy levels 2 n  = 4 x  = 20 and 2 n  = 6 x  = 30 characterized by a yellow corona. Some hexaploid cytotypes have more asymmetric karyotype with predominance of subtelocentric chromosomes. They are distinguished by orange corona and may correspond to    N.   obsoletus   . Other cytotype 2 n  = 28 of    N.   serotinus    was observed in the North Western biogeographic sectors.    N.   cantabricus    was found to be diploid with 2 n  = 2 x  = 14, which is a new diploid report in the southernmost geographic range of this polyploid complex.

﻿Cytotaxonomic investigations on species of genus Narcissus ( Amaryllidaceae ) from Algeria

Cytotaxonomic investigations on species of genus Narcissus ( Amaryllidaceae ) from Algeria