| A | B |
|---|
| botany | the study of plants |
| perennial plants | plants that grow year after year |
| annual plants | plants that live for only one year |
| xylem | nonliving vascular tissue that carries water and dissolved minerals from the roots of a plant to its leaves |
| phloem | living vascular tissue that carries sugar and organic substances throughout a plant |
| blade | primary portion of a leaf |
| apex | the tip of the blade of a leaf |
| petiole | the stalk of a leaf which attaches the blade to the stem |
| simple leaves | one leaf atttached to the stem of the plant by a single petiole |
| compound leaves | several leaflets attached to a single petiole |
| leaf margin | the characteristics of the leaf edge |
| deciduous plants | a plant that loses its leaves for winter |
| pollen | a fine dust that contains the sperm of seed-producing plants |
| cotyledon | a part of the seed which eventually becomes the first leaf of the plant |
| girdling | the process of cutting away a ring of inner and outer bark all the way around a tree trunk |
