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How to Pre-Register & Register a Daylily

N O T E: The following American Hemerocallis Society (AHS) Pre-Registration and Registration procedures are valid as of July 28, 1997.

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AHS Pre-Registration and Registration Procedures 

  1. Obtain an Official AHS Pre-Registration Form and/or AHS Registration Form by US Mail from the AHS Registrar or from the AHS WWW Site as an Adobe Acrobat(TM) Portable Document Format (PDF) file. In order to view a PDF file, you must have an Acrobat Reader which can br obtained free from Adobe® System's WWW site. Use the blank forms as your "master" to make additional copies for your future use. These forms must be used when submitting pre-registrations and registrations to the Registrar.

    N O T E: Online Pre-Registration and Registration Forms which can be submitted via the Internet will be available as soon as possible.


  2. For each proposed pre-registered seedling, select a seedling number which is an arbitrary code (i.e., not similar to a cultivar name) to distinguish one seedling from all others. Please refer to the Pre-Registration and Registration Form Guidelines for additional details.


  3. Along with each proposed pre-registered seedling number, select a name that has not been previously registered or pre-registered. Please refer to the Pre-Registration and Registration Form Guidelines and the AHS Registration Rules for additional details regarding names.


  4. Complete the Pre-Registration Form and send to the Registrar along with a five dollar ($5.00) Pre-Registration Fee per daylily name. Payment should be in US funds payable to the American Hemerocallis Society.


  5. After a 30-day waiting period (required to allow time for the Registrar to check the availability of each proposed seedling name) and notification by the Registrar of approval, the hybridizer may immediately register seedlings using the Registration Form or may wait up to 7 years to register the seedlings. Please refer to the Registration Form Guidelines and the AHS Registration Rules for additional details.


  6. Complete the Registration Form and send to the Registrar along with a 10 dollar ($10.00) Registration Fee per daylily name. Payment should be in US funds payable to the American Hemerocallis Society.

    Send all Pre-Registration and Registration correspondence to:

    Binion Amerson, Registrar
    American Hemerocallis Society
    13339 Castleton Circle
    Dallas, Texas 75234-5111
    Telephone/Fax 972/241-5812
    E-mail registrar@daylilies.org

    Note: The Registration Form and Fee may be submitted at the same time as the Pre-Registration Form and Fee. In this case, once pre-registration is approved and the hybridizer is notified, the daylily will be automatically designated as registered.

    Disclaimer: The Registrar is not responsible for recording or protecting any name not properly registered with the American Hemerocallis Society. The American Hemerocallis Society is not responsible for monitoring the commercial activity of any registered cultivar.

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AHS Pre-Registration and Registration Guidelines

Please carefully and accurately complete your Pre-Registration and Registration Forms. Information must be hand printed or typed. This will speed up the Pre-Registration and Registration Processes and will create a better record for your cultivar.

Form AHS-PR for Pre-Registration of a daylily seedling requires the following items:

  • Date which you submit the form
  • Name and address of originator
  • A valid Seedling Number
  • A Proposed Seedling Name (or previously approved Reserved Name)

Form AHS-R for Registration of a daylily cultivar requires the following items:

  • Date which you submit the form
  • A valid Pre-Registration Seedling Number (from the Pre-Registration Process)
  • An available and acceptable name
  • Height of the scape in inches
  • Season of bloom
  • Diameter of the flower in inches as naturally standing
  • Average number of branches per scape
  • Average number of buds per scape
  • A brief description of color and color pattern
  • A photographic color slide (optional until January 1, 1999)
  • Fragrance habit
  • Blooming habit
  • Foliage habit
  • Ploidy
  • Flower form -- state if single, double, polytepalous, spider, or spider variant
  • Name and address of originator.

Making sure these items are completed properly will save you time and give you a better registration. An explanation of all items on the forms is provided below. When these guidelines are carefully followed, your daylily descriptions in the Check List will be more meaningful.

Every document should be dated. Give a complete date: month, day, and year. The date should be the date the Registration Form is being prepared.


A seedling number is an arbitrary code (i.e., not similar to a cultivar name) to distinguish one seedling from all others. If you do not have an esablished system, use the first three letters of your family name followed by a series of digits or use other suitable combination of letters and digits. Examples: DOE00013, PI-R04, IMAB97-3.


Please print or type the name in order to avoid confusion and errors by the Registrar. The name must be an acceptable and available name, one that has not been used before, one that will not compete with a name that has been used before, and one that will not be likely confused in spelling or pronunciation with a name that has already been regisered. Please refer to the AHS Registration Rules.


The height of scape should be given in inches as it grows in your garden. Place a yard stick at ground level and measure to the tip of the scape. There may be some variation in height, give the average in full inches; fractions of inches will be discarded.


So as to provide a measurement of scape productivity, the average number of branches per scape should be indicated.


So as to provide bloom productivity, the average number of buds per scape should be indicated.


Daylilies bloom from early spring until frost, depending on the coldness of the climate. To indicate when a particular cultivar blooms during the season, use the following symbols:
EE - Extra Early.
These are the first daylilies to bloom, varying from March or April in the South, to May or June in the North.
E - Early.
These daylilies bloom from three to five weeks prior to the mass of bloom at midseason.
EM - Early midseason.
These daylilies bloom from one to three weeks before the height of bloom of most cultivars.
M - Midseason.
These daylilies bloom at the peak of the daylily bloom in your own garden. This ranges from May in the South to July in the North.
MLa - Late Midseason.
These daylilies bloom from one to three weeks after the peak bloom in your garden.
La - Late.
These daylilies bloom when most others have finished blooming, usually four to six weeks after the peak bloom.
VLa - Very Late.
These are the last daylilies to bloom, often late in the summer in the South, fall in the North.
Re - Reblooming.
Some daylily cultivars bloom more than one time during a single season. These are known as reblooming daylilies. Some of these bloom early, for example May or June, and then repeat in the fall. Others have a succession of bloom periods one shortly after another for several months. There is, as of now, no true ever-blooming daylily in all locations. Cultivars which always repeat in one location may not bloom twice in another. Repeat bloom is often influenced by geographical and weather conditions.

On your Registration Form, please circle the abbreviation(s) which indicate(s) your cultivar's season of bloom. If this is not done, it will not be listed in your registration.


Imagine a wire circle that is just large enough for the flower to pass through without or barely without touching. The diameter of the circle in inches will be the diameter of the flower. If you prefer, use a ruler and measure from tip to tip at the widest point and this will be the diameter. The main thing to remember is to measure as naturally standing -- do not uncurl recurved flowers for the measurement. The second thing to remember in recording the diameter is that a flower will be classed as miniature (i.e., less than 3 inches in diameter), small (3 inches or more, but under 4-1/2 inches in diameter), and large (4-1/2 inches or more in diameter). For Spider measurements, see later discussion.


There are a number of color patterns in daylily flowers:
The petals and sepals are all the same shade of the same color. The color of the stamens or of the throat may be different.
The flower segments are a blending of two colors; i.e., pink and rose. Petals and sepals are the same blending of colors; stamens and throat may be a different color.
The color is an intermingling of many colors, i.e., melon, pink, lavender, yellow; stamens and throat may be a different color.
The petals and sepals differ in color shade or intensity. The petals are a darker shade, i.e., rose pink while the sepals are lighter pale pink. A Reverse Bitone has sepals which are darker shade than the petals.
The petals and sepals are of a totally different color, i.e., red and yellow with the sepals being lighter in shade or color value. In a Reverse Bicolor, the sepals are the darker color and the petals are lighter.
Eyed or Banded.
A distinguishing pattern on many daylilies is a band of a different or darker shade of color at the juncture of the segments and the throat. This is refered to as an Eye or Band. If the darker shade occurs on the petals only, it is called a Band. If the darker shade appears on both petals and sepals, it is called an Eye. If the band of color is faint or lightly visible, it is called a Halo. A Watermark is a wide strip of a lighter shade where the segment color meets the throat. An Eyezone is the area or zone where the throat meets the outer segments; it might or might not have an eye, band, halo, or watermark.
Edged or Picoteed.
Separate colors at the edges of tepals may match the eye or band if an eye or band is present. Edges of tepals may also vary in color from the main color of the bloom.

Circle or underline the word band, halo, watermark, eyezone, or edge that applies to your cultivar and give the color to the right in the space provided. Describe other color characteristics (e.g., midrib, dotted, dusted) as necessary.

Color in Mass, Petal Color, Sepal Color, and Throat Color
Briefly in your own words give the color in mass, the color of the petals, and the color of the sepals. Color dictionary terms are not necessary; in fact they should not be used as most AHS members do not have access to color dictionaries.


Give a brief color description. Long and elaborate descriptions are not to be used here, they are reserved for the price list or catalog of the hybridizer. However, certain factors should be remembered in giving the color description.


Regardless of their principal color, daylilies may have a contrasting or complementing throat color of various shades of yellow, orange, melon, and green. The throat color of some daylilies is the same as the segments with no discernible change. These complete selfs most frequently occur in the yellow, orange, or gold cultivars. Give the color of the throat in the space provided for that purpose.


The flower either has no fragrance (none), is fragrant (fr.), or very fragrant (v.fr.). Circle the word or abbreviation which applies to the cultivar being registered.


This is required information. There are three terms necessary to describe the normal and the varying bloom habits found in daylilies. Circle the abbreviation which applies to your cultivar.
Diurnal (diu.)
These are daylilies which are the normal day-blooming type.
Nocturnal (noc.)
These are daylilies which open in the late afternoon or early evening and remain open all night and close the following day.
Extended (ext.)
These are daylilies which remain open at least 16 hours. There are extended bloomers in both diurnal and nocturnal daylilies.


This is required information. Circle the abbreviation which applies to your cultivar. Daylilies have three types of growth.
Evergreen (ev.)
These daylilies retain their foliage throughout the year. In the north, these plants overwinter as a mound of frozen foliage with the base of the fans green. In the spring, the old foliage dies and the living stumps start growing again.
Semi-evergreen (semi-ev. or sev.)
The foliage of these daylilies dies back part way. After a brief rest during the coldest months, it begins to grow again. The semi-evergreen trait is easiest to identify in plants that grow as evergreens in areas without killing frosts but go completely dormant in colder climates.
Dormant (dor.)
These daylilies lose their foliage completely before or after frost and overwinter with pointed foliage buds, usually beneath the soil level. In the spring, new foliage appears.


This is not required information, but is important to the breeder and to many growers. Space is provided for the Pod and Pollen Parents. For AHS Check List consistency, the Pod (i.e., female) Parent is listed first, followed by a capital X (which means pollinated by), followed by the Pollen (i.e., male) Parent. A small x is used in all other generations.

One Generation Example: (SHOCKWAVE X SUNNY MAGIC)
Two Generation Example: [(CHATEAU BLANC x PALE BLUSH) X Seedling]
Three Generation Example: {PALE BLUSH X [KALI x (Seedling x POLLY MAYO)]}

NOTE: Only Registered names may be used. The word "Seedling" will be be used for all non-Registered names.


Most daylilies are diploids. They have two identical sets of chromosomes in each cell. Tetraploids are plants that have had their chromosomes doubled either in nature or by chemical means. A box is provided for you to indicate which term applies to your cultivar.


Most daylilies have six segments (three petals and three sepals) and are known as a single flower.


These are daylilies with more than six segments. Doubles come in many different forms. The extra segments may appear as a tuft in the middle of the flower. These are called peony type doubles. They may appear in layers giving a hose-in-hose effect. The number of extra segments may vary from one or two to between six and eighteen, thus some doubles appear very full and fluffy while others appear to be only slightly double. Space is provided to record the double bloom percentage in the hybridizer's garden.


A polytepalous daylily has extra whole tepals (sepals and petals) in the two tepal whorls of the flower. In other words, a polytepalous daylily has more than the normal three sepals (usually four or five) in the outer whorl and more than three petals (usually the same number as sepals) in the inner whorl. Space is provided to record the polytepal bloom percentage in the hybridizer's garden.


The petals and sepals are much longer in proportion to their width than the normal flower. A SPIDER is a daylily whose petal length to width ratio is at least 5.0:1. A SPIDER VARIANT is a daylily whose petal length to width ratio is at least 4.0:1 and up to, but not including 5.0:1. Boxes are provided for you to indicate if the cultivar is a SPIDER or a SPIDER VARIANT with space to record petal width and length in inches. For width, measure the longest petal at its widest point as naturally standing (without uncurling, unfolding, or flattening any portion of the petal). For length, stretch out the petal to its fullest and measure the length of the longest petal from its tip to the vee-shaped notch formed where the adjacent sepals separate at the neck of the flower. The result of dividing the length by the width is expressed in the form of a ratio (e.g., 5.6:1 which is read "five point six to one").


The complete name and address of the originator must be given. The Originator has been determined by the Board of Directors to be the person who has ownership of the entire cultivar when it blooms for the first time.


This space is used only when a person other than the originator applies for the registration of the plant. In this case, the Registrant must have written permission of the originator before the plant can be registered (see Permission Statements).


Space is provided on the bottom portion of the Registration Form to obtain the written permission of the originator (if different from the Registrant). If the originator is deceased, write "Deceased."


Space is also provided on the bottom portion of the Registration Form to obtain the written permission of a person whose name you wish to use as a name of a cultivar. If the person is living and is not a member of your immediate family, you must have written permission before the name can be used as a name for a daylily. Immediate family has been defined for this purpose as Grandparents, Parents, Brothers, Sisters, Children, and Grandchildren. If the person is deceased, write "Deceased."

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