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TAXONOMIC NOTES ON ONOSMA SECT. APONOSMA FROM IRAN (BORAGINACEAE)

Published online by Cambridge University Press:  24 February 2014

M. Ranjbar  and
M. Almasi
M. Ranjbar
Affiliation:
Department of Biology, Faculty of Science, Bu-Ali Sina University, PO Box 65175/4161, Hamedan, Iran. E-mail for correspondence: [email protected]
M. Almasi
Affiliation:
Department of Biology, Faculty of Science, Bu-Ali Sina University, PO Box 65175/4161, Hamedan, Iran. E-mail for correspondence: [email protected]
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Abstract

Onosma mahabadensis Ranjbar & Almasi (Boraginaceae), a new species endemic to Iran, is described. This species belongs to Onosma sect. Aponosma DC. and is confined to the western part of Iran (West Azerbaijan Province). It is closely related to Onosma sericea Willd. and is distinguished by its subpatent-bristly indumentum (vs. appressed-sericeous) with sparse short hairs (vs. dense), and bracts 14–16 mm long (vs. 6–8 mm long). A cytogenetic analysis indicates that Onosma mahabadensis is a tetraploid species, 2n = 4x = 32, consistent with the proposed base number of x = 8 for Onosma sect. Aponosma.

Keywords

Boraginaceaemeiotic behaviournew speciesOnosmatetraploid
Type
Articles
Information
Edinburgh Journal of Botany , Volume 71 , Issue 1 , March 2014 , pp. 75 - 82
Copyright
Copyright © Trustees of the Royal Botanic Garden Edinburgh 2014 

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