geophyllous
/ˌdʒiːəʊˈfɪləs/ /dʒɪˈɒfɪləs/(also geophilous) Botany
adjective
Of a plant: propagating by means of underground buds, geophytic; (also) having leaves which retreat or grow below the surface of the soil, especially in response to periods of drought or low temperature.
Origin
Mid 19th century (in an earlier sense). From geo- + -phyllous.