(Botany)of, relating to, or denoting cryptogams (植)(与)隐花植物(有关)的;(与)无花植物(有关)的 ■(Ecology)(of a desert soil or surface crust) covered with or consisting of a fragile black layer of cyanobacteria, mosses, and lichens, which is often important in preventing erosion (生态)(沙漠土壤或地表)被隐花植物覆盖的