← Glossary Morphology trifoliate Having three leaflets, as in clover or poison ivy. A compound leaf divided into exactly three parts. Plants Using This Term (4) Fragaria vesca — Wild Strawberry Ptelea trifoliata — Common Hoptree Toxicodendron pubescens — Atlantic Poison Oak Toxicodendron radicans — Eastern Poison Ivy Related Terms achene acuminate aerial root alternate annual axillary basal berry biennial bract calyx capsule cauline clasping cordate corolla corymb crenate cyme cypsela deciduous dentate drupe entire evergreen fenestration follicle glaucous inflorescence lanceolate legume ligulate lobed opposite ovary palmate panicle papilionaceous pappus pedicel perennial petiole pinnate pubescent raceme rachis rhizome rosette sepal serrate sessile silique spadix spathe spatulate stamen stipule succulent taproot ternate thallus umbel undulate whorled