Determined according to the botanical keys provided in Flora Europaea (Ball in Tutin et al., 1972).
Two subspecies of Lamium bifidum Cyrillo occur in the Osogovo region: Lamium bifidum Cirillo subsp. bifidum and Lamium bifidum subsp. balcanicum Velen. Distinction between subspecies:
–Lamium bifidum Cirillosubsp. bifidum: corolla white; lower leaves cordate to almost truncate at base; leaves usually with a whitish patch along the main vein on the adaxial side.
–Lamium bifidum subsp. balcanicum Velen: corolla purple, lower leaves rounded at base according to literature data (note: heart shaped leaves of the populations in Osogovo do occur); white patch along middle vein absent.
Habitat: Clearings and edges of forests.
Distribution:Lamium bifidum subsp. balcanicum Velen. is native to the Balkan Peninsula and Romania according to The Euro+Med PlantBase (source: World Checklist of Selected Plant Families (2010).
Lifeform: Annual, therophyte according to the Raunkiaer system.
Flowering period: Spring: APR, MAY.
Lamium bifidum subsp. balcanicum – habit. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – habit. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – habit. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowering stems. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowering stem with verticillasters. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowering stems with verticillasters. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowers. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowers. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowers. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowers. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowers. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowers. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – stems with cauline leaves. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – upper cauline leaf. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – upper cauline leaves. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – lower part of plant. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – lower part of plant. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – stem with lower cauline leaf. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – lower cauline leaves. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – lower cauline leaves. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – adaxial side of lower cauline leaf. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – adaxial side of lower cauline leaf. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – adaxial side of lower cauline leaf. Lake “Gradche”, 03.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – habit. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – habit. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – habit. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowering stem with verticilllasters. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowering stem with verticilllasters. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowers. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowers. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowers. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowers. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowers. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowers. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowers. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – flowers. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – veticillaster with spent flowers. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – lower leaves. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.Lamium bifidum subsp. balcanicum – lower leaves. Near lake “Gradche”, on the east side, 16.04.2022. Photo by Trajche Dimitrovski.
