Based on comparisons between similar communities in northeastern Italy, southern Austria, central and southeastern Slovenia, and western Croatia, we classified black hornbeam and flowering ash phytocoenoses on steep rocky sites in the beech forest belt in northwestern and western Slovenia into the association Fraxinio orni-Ostryetum Aichinger 1933 and described its new subassociation -phyteumatetosum columnae in the foothills of the Julian Alps and in the northern part of the Dinaric Alps. Black hornbeam and flowering ash stands on steep shady slopes with a higher proportion of diagnostic species of beech and spruce forests are classified into the new association Rhododendro hirsuti-Ostryetum Franz ex Dakskobler, ass. nov. hoc loco, new subassociation -mercurialietosum perennis and the provisional variant var. Hemerocallis lilioasphodelus whose stands are floristically rather similar to the stands of the association Hemerocallido-Ostryetum. Na podlagi primerjav s podobnimi združbami v severovzhodni Italiji, južni Avstriji, osrednji in jugovzhodni Sloveniji ter zahodni Hrvaški smo fitocenoze črnega gabra in malega jesena na strmih skalnatih rastiščih v pasu bukovih gozdov v severozahodni in zahodni Sloveniji uvrstili v asociacijo Fraxinio orni-Ostryetum Aichinger 1933 in v prigorju Julijskih Alp in v severnem delu Dinarskega gorstva opisali njeno novo subasociacijo -phyteumatetosum columnae. Sestoje črnega gabra in malega jesena na strmih osojnih pobočjih z večjim deležem diagnostičnih vrst bukovih in smrekovih gozdov uvrščamo v novo asociacijo Rhododendro hirsuti-Ostryetum Franz ex Dakskobler, ass. nov. hoc loco in v novo subasociacijo -mercurialietosum perennis ter v provizorno varianto var. Hemerocallis lilioasphodelus, katere sestoji so floristično precej podobni sestojem asociacije Hemerocallido- Ostryetum.