Narcissus, Linnaeus, 1753

Koopowitz, Harold, Howe, Marilynn & Christenhusz, Maarten J. M., 2017, Nomenclatural notes on some autumn flowering daffodils (Narcissus, Amaryllidaceae), Phytotaxa 297 (2), pp. 157-167 : 164-165

Key to the autumn flowering species of Narcissus

1 Flowers hysteranthous........................................................................................................................................................................2

- Flowers synanthous............................................................................................................................................................................5

2 Tepals white........................................................................................................................................................................................3

- Tepals coloured, yellow or green........................................................................................................................................................4

3 Corona reduced, divided into six lobes (not entire), lemon, tube inflated, normally only one flower in the scape......... N. serotinus

- Corona not reduced, divided into three lobes (or entire but then triangular in shape), orange, tube narrow, one to eight flowers in the scape ............................................................................................................................................................................ N. miniatus

4 Tepals yellow, corona reduced to six scales .................................................................................................................. N. cavanillesii

- Tepals green, corona six separate lobes......................................................................................................................... N. viridiflorus

5 Corona as long as or longer than the tepals........................................................................................................................................6 - Corona less than half the length of the tepals.....................................................................................................................................8

6 Tepals not reduced, corona tubular, anthers with radial arrangement .......................................................... N. minor ‘Cedric Morris’

- Tepals reduced, corona conically expanded, anthers placed ventrally...............................................................................................7

7 Flowers pristine white .................................................................................................................................................. N. cantabricus

- Flowers cream to creamy-yellow ..................................................................................................................................... N. romieuxii

8 Tepals yellow, more than one flower to a scape, corona less than half the tepal length ...................................................... N. aureus

- Tepals white or cream, usually one flower to a scape, corona different in proporton........................................................................9

9 Corona present..................................................................................................................................................................................10

- Corona absent .............................................................................................................................................................. N. broussonetii

10 Corona white....................................................................................................................................................................................11

- Corona orange or yellow..................................................................................................................................................................12

11 Stamens emergent, filling the corona. Plants robust with many small rounded flowers per scape............................. N. pachybolbus

- Stamens not emergent, small in relation to corona. Plant variable in size, few to many flowers per scape ................. N. papyraceus

12 Corona orange with sides incurved .................................................................................................................................. N. obsoletus

- Corona yellow with sides straight ........................................................................................................................................ N. tazetta