The International Daffodil Register and Classified List (1998)

Horticultural classification

Division 11 - Split-corona Daffodil Cultivars

Corona split - usually for more than half its length

	a) Collar Daffodils Split-corona daffodils with the corona segments opposite the perianth segments; the corona segments usually in two whorls of three
	b) Papillon Daffodils Split-corona daffodils with the corona segments alternate to the perianth segments; the corona segments usually in a single whorl of six

Division 12 - Other Daffodil Cultivars

Daffodil cultivars which do not fit the definition of any other division

Division 13 - Daffodils distinguished solely by botanical name

Section Tapeinanthus

Autumn flowering; one to four flowers to a rounded stem; leaves very narrow, glaucous, not always present on flowering bulbs; flower ascending, yellow; corona absent or rudimentary; anthers widely exserted from the tube, much shorter than the filaments, dorsifixed

Section Serotini

Autumn flowering; usually one to two flowers to a rounded stem; leaves very narrow, glaucous, not always present on flowering bulbs; perianth segments pure white, usually twisted; corona very short, yellow, orange or green; anthers included in or slightly exserted from the tube, longer than the filaments, dorsifixed; flowers fragrant

Section Aurelia

Autumn flowering; three to twelve flowers to a compressed stem; leaves flat not channelled, glaucous; flowers white; corona rudimentary or absent; filaments unequal in length; anthers exserted from the tube, dorsifixed; flowers fragrant

Section Tazettae

Autumn to Spring flowering; three (rarely two) to twenty flowers to a usually compressed stem; leaves flat or channelled, usually glaucous; flowers white, yellow or bicoloured; anthers included in or slightly exserted from the tube, much longer than the filaments, dorsifixed; flowers fragrant. The rounded stem and green leaves of N. aureus atypical, also the orange corona of N. elegans

Section Narcissus

Spring flowering; usually one flower (exceptionally two to four) to a compressed stem; leaves flat not channelled, glaucous; perianth segments pure white; corona disc-shaped or very shallow, sometimes of a single colour, but usually with base green, mid-zone yellow and rim red or orange and often scarious; anthers partly exserted from the tube, much longer than the filaments, dorsifixed; flowers fragrant. Section covers N. poeticus

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