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Sideritis cypria
http://www.anniesannuals.com/signs/s/sideritis_cypria.htm
Photo and description.
Sideritis dasygnaphala at Flora.cyberia
http://www.floracyberia.net/spermatophyta/angiospermae/dicotyledoneae/lamiaceae/sideritis_dasygnapha
Photo of S. dasygnaphala.
Sideritis syriaca
http://www.ibiblio.org/pfaf/cgi-bin/arr_html?Sideritis+syriaca&CAN=LATIND
Horticultural data, physical characteristics, and references for this perennial.
Sideritis theezans
http://www.ibiblio.org/pfaf/cgi-bin/arr_html?Sideritis+theezans&CAN=LATIND
Sideritis theezans - horticultural data, characteristics and references.