Cruciata glabra, smooth crosswort, is a species of flowering plant in the family Rubiaceae, native to Morocco, Algeria, southern, central and eastern Europe, the Caucasus, Kazakhstan, the Altai, and western Siberia. It is often found in beech (Fagus sylvatica) forests.
Subspecies The following subspecies are currently accepted:
Cruciata glabra subsp. balcanica (Ehrend.) Soó Cruciata glabra subsp. glabra Cruciata glabra subsp. hirticaulis (Beck) Natali & Jeanm. Cruciata glabra subsp. krylovii (Iljin) E.G.Naumova
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