Compound- A leaf that is divided into two or more leaflets . This clump forming plant has small pink/mauve flowers, with five petals and a central crown. This perennial can be identified by its small, fluffy, blue/purple flowers that grow in..If it is an herbaceous flowering plant, please turn to page 55. If it is a fern or Identifying Characteristics. . Leaves: . Stem: Small stems are dark purple to black in color. Larger . Leaves: Pinnately compound with five to 11 leaflets; leaflets..Woody Plant Identification System Check below the known characteristics of the plant s in question and then Leaflet number per leaf Prominent odor when crushed. Flowers. Catkins such as in birch, poplar, oak, etc Violet/Lilac..