Alisha Weeks Ryan Johnson Erica Thomas

1

Angiosperms!

• Alisha WeeksRyan JohnsonErica Thomas

2
Intro to Angiosperms

• Arguably the most diverse major extant plant
  group
• 260,000 living species
• 453 Families
• Occupy every environment on Earth except high
  mountain tops, regions around the poles, and the
  deepest oceans.

3
(No Transcript)
4
Mode of Fertilization

• Insects are attracted to the flowers so they
  crawl onto them and are dusted with pollen.
• Then fly to the next flower and the pollen is
  brushed directly onto the female plant parts.
• Throughout time, they have coevolved to become
  more attractive to insects
• More vivid color, fragrances, and nectar.
• Some insects coevolved with them to become
  specialists in pollinating specific plants
• Bees, insects bats and birds

5
Diversity

• 90 of existing species are flowering plants
• Diverse in size
• Aquatic duckweed (1mm) to Eucalyptus trees (100m)
• Most are photoautotroph, some are parasites,
  carnivorous plants

6
Lineages and Dominant Groups

• Groups used to be divided based on number of
  cotyledons tiny leaves that form on embryo
  sporophytes inside seeds.
• Two cotyledons dicots
• One cotyledon monocots
• Monocots branched off the dicot lineage
• Divergences from original lineages gave rise to
  three dominant groups
• Magnoliids, eudicots, monocots

7
Butomus umbellatus

• Magnoliids
• 9,200 different kinds including avacado, nutmeg
  trees, and pepper plants
• Eudicots (true dicots)
• 170,000 species
• Most herbaceous non-woody plants including
  daisies, lettuces and cabbages
• Monocots
• 80,000 species including orchids, palms, lillies,
  grasses, and important crop plants

Ampelopsis brevipedunculata
Asimina