Plants & Lichens
Monocotyledons:
plants characterized by a seed with a single seed-leaf (cotyledon), flower
parts arranged in threes, and leaves with parallel veins (e.g. grasses,
lilies, palms)
Dicotyledons:
plants characterized by a seed with two seed leaves (cotyledons), flower
parts usually arranged in fours or fives, and netlike veins in the leaves
(e.g. hardwood trees, beans, roses)
Pteridophytes (ferns):
flowerless and seedless vascular plants having true roots from a rhizome,
fronds that uncurl upward, and reproduce by spores
Lichens: symbiotic relationships between algae and fungus -- most of the lichen is composed of fungal filaments, but among the filaments are algal cells
