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Table 3 Species were grouped into physiognomic life form groups

From: Vegetation composition of old extensive green roofs (from 1980s Germany)

Life form Vegetation type
Woody Trees, shrubs, sub-shrubs
Grasses Grasses
Succulents Succulent and crassulacean species
Forb Herbaceous flowering plants
Bulb Bulbous flowering plants
Cryptogam Mosses and liverworts