رستنیها-Rostaniha, ( ISI ), Volume (7), No (2), Year (2006-3) , Pages (207-211)
Title : ASPERULA OPPOSITIFOLIA SSP. RECHINGERI (RUBIACEAE-RUBIEAN), A NEW TAXON FROM N. KHORASAN PROVINCE, I ( ASPERULA OPPOSITIFOLIA SSP. RECHINGERI (RUBIACEAE-RUBIEAN), A NEW TAXON FROM N. KHORASAN PROVINCE, I )
Authors: Farrokh Ghahremaninejad , Mohammad Reza Joharchi , Marjane Aydani ,File: 
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Asperula oppositifolia ssp. Rechingeri is described from Khorasan Province, Iran. Asperula oppositifolia comprises six subspecies mainly distributed in E. Afghanistan, Pakistan, and Middle Asia. Describing these taxa from Iran, shows the extent of diversity of this species in Iran. Morphological evidence supports taxonomic position of these taxa in A. oppositifolia, and the subspecies appears to be most closely related to subsp. pseudo-cynanchica Ehrend.
