Plant Anatomy & Characteristics

  • Dormant: A term used to describe a daylily cultivar that loses its foliage in winter and goes into a period of dormancy until the following spring.
  • Semi-evergreen: A term used to describe a daylily cultivar that retains some foliage through the winter, but still undergoes a period of dormancy.
  • Evergreen: A term used to describe a daylily cultivar that retains its foliage throughout the year, without going into a period of winter dormancy.
  • Dormancy: A period of slowed growth or inactivity in a daylily plant, often triggered by environmental factors such as temperature or light levels.
  • Rebloomer: A daylily cultivar that produces multiple flushes of blooms over the course of a season.
  • Diploid hybrid: A daylily cultivar that is the result of crossbreeding two diploid plants.
  • Tetraploid hybrid: A daylily cultivar that is the result of crossbreeding two tetraploid plants.
  • Bloom season: The time period during which a daylily cultivar produces blooms.
  • Rust resistance: The ability of a daylily cultivar to resist infection by the fungal disease known as rust.
  • Scape: The tall, leafless stalk that supports the flowers of a daylily plant.
  • Foliage: The leaves of a daylily plant. Dormant, semi-evergreen, and evergreen.
  • Crown: The base of a daylily plant from which the leaves and flowers grow.
  • Rhizome: An underground stem that produces roots and shoots.
  • Bud: A small, undeveloped flower or leaf.
  • Bloom: The flower of a daylily plant.
  • Petal: One of the inner, often brightly colored parts of a flower.
  • Sepal: One of the outer, usually green parts of a flower that protect the flower bud before it opens.
  • Tepal: A petal-like segment of a flower that is not clearly differentiated into petals and sepals.
  • Stamen: The male reproductive organ of a flower, typically consisting of a filament and an anther that produces pollen.
  • Pistil: The female reproductive organ of a flower, typically consisting of a stigma, style, and ovary.
  • Anther: The part of the stamen that produces and contains pollen.
  • Pollen tube: The structure that grows from a pollen grain to the ovary of a flower, carrying male gametes to fertilize the female gametes.
  • Style: The narrow, elongated part of the pistil that connects the stigma and the ovary.
  • Ovary: The part of the pistil that contains the ovules and develops into a fruit after fertilization.
  • Staminate: A term used to describe a flower that has only stamens and no pistils.
  • Unusual form: A term used to describe a daylily flower with a unique or unusual shape or structure.
  • Double form: A term used to describe a daylily flower with extra petals that give it a fuller, more rounded appearance.
  • Spider form: A term used to describe a daylily flower with long, narrow petals that resemble the legs of a spider.
  • Polymerous form: A term used to describe a daylily flower with more than the usual number of petals or sepals.
  • Miniature: A term used to describe a daylily cultivar with smaller than average blooms.
  • Dwarf: A term used to describe a daylily cultivar with shorter than average scapes and smaller than average blooms.
  • Substance: A term used to describe the thickness and durability of a daylily bloom.
  • Eye: The center of a daylily bloom, usually a different color than the rest of the bloom.
  • Fragrance: The pleasant odor emitted by a daylily bloom.
  • Fans: Describes the number of foliage fan/root divisions. For example a Single Fan division is just one. A Double Fan (DF, 2F) means two fan root division. A Triple Fan (TF, 3F) means three fan root division. Four or more fans is commonly referred to as a clump.

Growing & Care

  • Mulch: A layer of organic material applied to the soil around a daylily plant to help conserve moisture and regulate soil temperature.
  • Fertilizer: A substance added to soil to provide nutrients to a daylily plant.
  • Deadheading: The process of removing spent blooms from a daylily plant to encourage more blooming.
  • Division: The process of separating a clump of daylilies into smaller sections to propagate new plants.
  • Watering: The process of applying water to a daylily plant to help it grow and thrive.
  • Sun exposure: The amount of direct sunlight a daylily plant receives, often categorized as full sun, partial sun, or shade.
  • Soil pH: The level of acidity or alkalinity in the soil, which can affect a daylily plant’s growth and nutrient uptake.
  • Pesticide: A chemical or natural substance used to control pests or diseases that may harm a daylily plant.
  • Insecticide: A pesticide specifically designed to control insects that may damage a daylily plant.
  • Fungicide: A pesticide specifically designed to control fungal diseases that may affect a daylily plant.

Propagation & Hybridization

  • Pollination: The process of transferring pollen from the anthers of a daylily flower to the stigma of another flower, either through natural means or with human intervention.
  • Crossbreeding: The process of intentionally breeding two different daylily cultivars to create a new hybrid cultivar.
  • Seedling: A new daylily plant grown from seed.
  • Interspecific hybrid: A hybrid cultivar created by crossbreeding two different species of daylily.
  • Species daylily: A daylily cultivar that occurs naturally in the wild, rather than being a cultivated variety.
  • Daylily - Carrot Rouge Truffle - This is a nicely formed
  • Daylily - Beverly Walker - full petaloid formed double

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