background and objectives: dracocephalum kotschyi is a plant which belongs to the lamiaceae family and exists mostly in south-west asian countries, including iran. this plant is used as antispasmodic, analgesic and anti-inflammatory to treat rheumatoid diseases. methods: in order to investigate the impact of the harvesting time changes on the quantity and quality of mono- and sesquiterpenoid co...

abstract colchicum kotschyi boiss (colchicaceae) is one of the sixteen iranian native colchicum species, containing considerable amount of colchicine. to study the effect of different nutrient levels on corm yield and colchicine content of colchicum kotschyi boiss under open field soilless culture, an experiment was performed in a randomized complete design at the horticultural research station...

the genus tanacetum l. is one of the most important medicinal plant that contains 28 species in iran, 12 of them are endemics. this paper reports the essential oil composition of tanacetum hololeucum (bornm.) podlech; tanacetum kotschyi (boiss.) grierson, growing wild in iran. plant flowers were collected from different zones of dizin in north of iran. all samples were hydro-distilled (clevenge...