Annual - A plant that lives one year or less.
Basal Rosette - A cluster of basal leaves arranged in a circular form.
Biennial - A plant that lives for more than one year but less than two years.
Caudex - Thickened, woody, trunklike base of stem on certain perennials.
Internode - The portion of a stem between two successive nodes.
Node - A joint bearing a leaf.
Opposite - On both sides at the same level (leaf arrangement).
Petiole - The stem of a leaf.
Perennial - A plant persisting for several years.
Prostrate - Living flat on the ground.
Pubescent - Covered with short hairs.
Ray Flower - A flower that has the petals strap or tongue-shaped (in the family Compositae)
Sepal - The outer whorl of a flower.
Sessile - Without a stalk.
Spike - An inflorescence consisting of a central axis bearing sessile flowers.
Stamen - The pollen bearing organ of the flower.
Summer Annual - Germinate in the spring, grow during the summer, set seed and die in the fall.
Winter annual - Germinate in the fall, set seed and die late spring or summer.