### plant | tracheophyte:

Cultivar
* Many cultivars grown in greenhouses such as European cucumbers are parthenocarpic
  - have flowers in a range of color, while others have flowers in a single color
  - turn color before they are ripe
* Most cultivars are monoecious, with separate male and female flowers in the same plant
  - mutations that produce genetically normal seed
  - susceptible to viruses that decrease productivity and shorten stand life
  - bloom fairly early in the season when there is little competition from other plants
  - have loose, open growth habits and leaves that range from smooth to frilly
* Most cultivars produce an excess of daughter plants
  - pollen at the time the stigma is receptive
  - sucker readily from the roots of the parent plant
  - tiller profusely and lodge when soil fertility and moisture is plentiful
* Some cultivars are cooperative in producing wide angled, spreading limbs.
* Some cultivars are more prone to color changes than others
  - tolerant of sun than others
  - sensitive to terbacil
  - susceptible to fireblight
* Some cultivars bloom and set fruit in alternate years
  - more freely if the branches are trained horizontally rather than vertically
  - die within a month of infection
  - even exhibit variegated leaves
* Some cultivars exhibit green foliage, variegated with yellow or white stripes
  - small dead spots or flecks on the leaves
* Some cultivars have flowers that are shaded with a subtle blending of two or more colors
  - heat and drought tolerance
* Some cultivars have leaves edged in yellow or white
  - variegated with white or yellow
* Some cultivars produce flowers on the current year's growth, others on the previous year's growth
  - fruit that is astringent except when fully ripe
  - only two flowers per stalk while others produce up to six
  - shed their pollen before the female flowers are receptive
  - show leaf hopper injury that mimics potassium deficiency
* also vary in their ability to attract pollinators.
* are complex hybrids of many other cultivars and species
  - researched and created to promote desirable traits
  - selected for their vigorous growth habits, disease resistance, flowers or fragrance
  - used as ornamental plants
  - varieties that have been developed for plant form, leaf color, and plant size
  - variety
* can differ in susceptibility
  - vary in flower color shades because of weather, year, soil and location differences
* differ greatly in susceptibility to the common diseases
  - their susceptibility to winter injury
* differ in fruit quality for a processed product
  - sensitivity to chemicals
  - the ability of infected plants to set seed
  - their ability to compete with weeds
* have flowers of a different color.
* is variety
* offer variation in foliage color and form.
* vary in both flower and foliage color
  - fineness and color of leaves
  - foliage and flower features
  - plant height, shape and color of the pod
  - the quantity of catkins produced
* vary in their maturity schedule and in their cold tolerance
  - susceptibility to rust diseases
  - widely in soluble solids at maturity
+ Tulip: Liliaceae :: Flowers
  * There is many cultivars and species of tulips. Cultivars are used as ornamental plants.

### plant | tracheophyte | cultivar:

Apple cultivar
* Many apple cultivars are well adapted to freezing either as sauces or slices.
* Most apple cultivars are moderately to highly susceptible to scab
  - have brown seeds when ready for harvest
* have different maturity periods, the time from bloom to harvest.
* vary in susceptibility and extent of damage.

Pecan cultivar
* differ in the order that the male and female flowers mature
  - staminate and pistillate flowers mature
* vary in their tendency toward alternate bearing.

Variegated cultivar
* grow best in somewhat lower light.
* tend to loose their white color as shade increases.