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Daylily Varieties: Hemerocallis - Diploid, Spider...

Updated on September 29, 2013

Daylily Glossary

There are thousands of varieties of Daylilies and seemingly even more jargon used to describe them. In fact, they are classified according to around six sets of characteristics. These are flower form, color, pattern, ploidy, flowering habit and flowering season.


Sets of Chromosones

Diploid Daylilies are more common and easier to grow than Tetraploid. Pink, spider and double dayliles are most likely to be diploid.

Tetraploid Daylilies have been bred to outperform Diploid Daylilies in many ways: flowers are larger; colors are more intense; scapes stronger; growth and flowering are more vigorous.

Blooming Habit

When do Flowers Open

Hemerocallis means day beauty, and that's how long each Daylily flower lasts, but they open at different times of the day.

Diurnal Daylilies open during the day

Nocturnal Daylilies late afternoon and close in the morning

Extended Daylilies open for at least 16 hours. In addition, they may be either Diurnal or Nocturnal

Blooming Sequence

Which Daylilies Flowers When

One Daylily or another is in flower for about eight or nine months of the year, starting in early Spring. What follows is an overview of the Daylily flowering periods: Each lasts about 30 days.

Extra Early Dayliles flower first - March in the southern US; May or June in the North or the UK.

Early Daylilies are next, flowering from around May in the South, June or July in the North

Early Midseason - April in the South to June in the north

Midseason - May in the South to July in the north

Late Midseason - June in the South to August in the North

Late - June/July in the South to August/September in the North

Very Late - Late August in the South to late September/October in the North.

Rebloomer - Blooms more than once. Sometimes, a spring flush is followed by another in the fall. Sometimes flowers appear for months on end

Color Patterns

Bicolor, bitone, blended, dotted, dusted, edged, eyed and polychrome

Bicolor: petals are different colors from sepals

Bitone: petals and sepals are a less or more intense shade of the same color

Blend: two or more colors blended

Dotted: clusters of spots

Dusted: Color is faded

Diamond Dusted: sparkling flowers

Edged or Picoteed: flower edges are darker or lighter

Midrib: different colored flower veins

Polychrome: three of more colors

Self: flower is all one color not including the stamens and throat

Tipped: tips are different color or shade from the rest of the flower

Flower Forms

Circular, Double, Flaring, Recurved, Ruffled, Spider, Star, Triangular and Trumpet Daylilies

Circular: overflowing, overlapping segments make flowers appear round

Double: more than six segments

Flared: petals arch over backwards

Flat: flowers don't arch

Recurved: flared but edges roll back

Ruffled: frilled edges

Spider: long narrow spidery petals

Star: flowers resemble three-point or six-point star

Triangular: front view reveals a triangle

Trumpet: Petals are more upright than flared, looking like a lily from the side

Flower Size

Miniature, Small and Large Flowered Daylilies

Miniature flowers are less than 3" (7.5cm) across

Small flowers are 3" (7.5cm) to 4" (10cm) across

Large flowers are 4" (10cm) across and larger


Low, Medium and Tall Daylilies

Low: scapes are 6" (15cm) to 24" (60cm) tall

Medium: scapes are 24" (60cm) to 36" (90cm)

Tall: scapes are 36" (90cm) or taller

Other Daylily Terms


The leafless flower stalk. From it grow flower-bearing branches, usually two more.


Each Daylily fan has a crown, a scape with branches and leaves. A group of fans is a clump.

Foliage Habit

Evergreen, Semi-Evergreen and Dormant

Dormant: Leaves die back in winter.

Semi-evergreen: Some leaves remain throughout the winter, depending on the climate.

Evergreen: Leaves grow all winter in mild climates, but may freeze in cold climates.


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    • profile image


      6 years ago

      this lens is my 900th squidlike !!!! hws that....?

    • profile image


      7 years ago

      Very informative lens. Thank you for sharing.

    • profile image


      7 years ago

      Very informative lens. Thank you for sharing.


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