Ptilium crista-castrensis f. adpressum Holler ex Warnst. Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Bryophyta class Bryopsida order Hypnales family Pylaisiaceae genus Ptilium species Ptilium crista-castrensis Name Homonyms Ptilium crista-castrensis f. adpressum Holler Ptilium crista-castrensis f. adpressum Holler ex Warnst.