### plant | tracheophyte | tree:

Papaya
* Most papaya contains active compounds
  - fiber
  - nutrients
  - grows from seeds
* Most papaya grows in climates
  - tropical climates
  - under conditions
* Most papaya has pear shapes
  - skin
  - produces fruit
* Some papaya contains digestive enzymes
  - potassium
* Some papaya has families
  - foliage
* Some papaya prevents excessive hunger
  - papayas resemble small watermelons, while others are quite small and almost round
* also get ride of intestinal warms
  - grow best in full sun
* are adapted to practically any well drained soil
  - also a good source of fiber, which has been shown to lower high cholesterol levels
* are fast growing shade trees, and they look really good, too
  - growing, single stem plants
  - pear-shaped fruits
  - ripe when the skin turns yellow
  - very soft and can be cut with a spoon, but for a smooth edge use a paring knife
  - well-known in Hawaii
* come in a variety of sizes, both long and thin and short and stout
  - different sizes
* contain a proteine-splitting enzyme, see kiwis.
* fruit tree
* get a whole slew of viruses and diseases, transmitted by sucking insects.
* grow in tropical climates and are also known as papaws or pawpaws.
  - smell
* have a short life usually lasting only a few years
  - an enzyme called papain that breaks down protein, making it a great meat tenderizer
  - exacting climate requirements for vigorous growth and fruit production
  - large soft leaves
* includes bark
  - cell membranes
  - cells
  - corpi
  - cytoplasm
  - leaf nodes
  - nuclei
  - peels
  - plasma membranes
  - sections
  - stumps
  - tree branches
  - treetops
  - vacuoles
  - xylem
* is edible fruit
  - part of papaya
* love the heat and sunlight.
* produce ethylene and are sensitive to the gas.
* ripens even after it has been plucked.
* start flowering when they are about one metre tall.
* thrives in environments
  - tropical environments
  - under warm conditions with abundant rainfall or irrigation
* yields black seeds

Papaya tree
* bear fruit.
* have straight trunks

Pawpaw tree
* are also attractive to the homeowner as an ornamental planting in edible landscapes
  - capable of rapid growth, under ideal conditions
  - prone to producing root suckers a few feet from the trunk
* do well in humid continental climates, similar to their native range.
* establish and grow best when they are given shelter the first year in the field.
* require adequate soil moisture, especially in the first two years after planting.

Pepper tree
* Most pepper trees produce flowers.
* Some pepper trees belong to families
  - produce allergen
* produce flowers that are attractive, but messy

Phylogenetic tree
* Most phylogenetic trees show classifications.
* are a convenient way of visually representing the evolutionary history of life
  - base on assumptions
  - built up by discovering groups united by synapomorphies
  - central to the field of phylogenetics
  - fossilized trees
* illustrates how different organisms on the tree of life relate to each other.
* support the coevolution of parasites and their hosts.

Red alder
* Some red alders have growth
  - height growth
  - indeterminate growth
* are alders.
* grows in both pure and mixed stands
  - climates varying from humid to superhumid
* has a number of foliage and catkin diseases, but none are economically important
  - the additional benefit of being able to fix nitrogen
* is also an important source of firewood.
* is an early seral species
  - important source of pulp for paper products

Redbud
* Many redbuds are in bloom, and now some have leaves starting to open.
* also appear as understory growth in many hardwood forests
  - have brows pods that usually appear in early summer
* are an understory tree
  - legumes
* do great in full sun or partial shade.
* have the longest bloom time of any spring flowering tree.
* tolerate moderate dry spells, but do better when irrigated in summer dry spells.