cryptogamic
/ˌkrɪptəʊˈgæmɪk/adjective
1- Botany of, relating to, or denoting cryptogams【植】（与）隐花植物（有关）的, （与）孢子植物（有关）的。
1.1
- 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】（荒漠土或结皮层）覆盖着一层黑色脆性藻青菌、苔藓和地衣的; 由一层黑色脆性藻青菌、苔藓和地衣组成的。