This is about the study of narcissus cells and includes chromosome work, molecular genetics, biochemistry, pollen size and shape, etc,.  These studies are presented in chronological order with the most recent works listed first.

2001 to Present

Kálmán Könyves, John David & Alastair Culham. “Jumping through the hoops: the challenges of daffodil (Narcissus) classification.” Botanical Journal of the Linnean Society (2019) doi:10.1093/botlinnean/boz032. Published by Oxford University Press/ on behalf of the sponsoring society if the journal is a society journal.

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“Researchers map daffodil’s chloroplast genome for the first time,” University of Reading,, November 6, 2018

“End to the daffodil colour lottery in sight as scientists map the plant’s genetic code,” by Henry Bodkin, The Telegraph, Nov. 5, 2018

“Revealed: The secret of the poet’s daffodil,” by Helen Griggs, BBC News, Nov. 5, 2018

“The complete chloroplast genome of Narcissus poeticus L Amaryllidaceae Amaryllidoideae” by Konyves et al, Mitochondrial DNA Part B, Oct. 8, 2018

“New data on daffodils of the Narcissus nevadensis complex (Amaryllidaceae) in SE Spain: N. nevadensis subsp. herrerae subsp. nov., and N. nevadensis subsp. longispathus comb. nov.”, by Algarra et al, Phytotaxa Vol 371 (2): pp 133-139, 2018.  ABSTRACT

“The inheritance of the red and pink colour the fertility of triploids and the self incompatibility of daffodils remarks to (1),” Theo Sanders, Daffnet, December 2017

“Observations on the morphology of several autumn-flowering Narcissus species,” Fernando Urena Plaza, posted on Facebook 2017

“Nomenclatural notes on some autumn flowering daffodils,” Koopowitz et al, Phytotaxa 2017, ABSTRACT

“Narcissorum Notulae, LII,” Fernandez Casas and Gomez Murillo; Fontqueria_56(58). 17 March 2017

“Dataos demograficos y estudio del habitat de Narcissus fernandesii G Pedro en el centro de la peninsula iberica,” J. Rojo et al, Universidad de Castilla-La Mancha

“Evolution of the Species of Narcissus: A Review,” by John David, The Daffodil Journal, March 2017

“Crosses of tetraploid species with each other or with tetraploid standard daffodils,” Theo Sanders, Germany, February 2017

“Novedades En Narcissus L. Amaryllidaceae,”, Barra Lazaro et al; Flora Montiberica 63, pp. 103-111; 2016

The generation of fertile allotretraploid species hybrids by chromosome doubling; Theo Sanders, Germany, June 2015

“Population Genetics Methods Applied to a Species Delimitation Problem: Endemic Trumpet Daffodils (Narcissus section pseudonarcissus) from the Southern Iberian Peninsula;” Medrano, M.,  et al, International Journal of Plant Sciences, 2014

“Phenotypic Integration in Style Dimorphic daffodils (Narcissus, Amaryllidaceae) with different pollinators;” Perez-Barrales, R.,  et al; Philosophical Transactions of The Royal Society B, 2014

Crosses from different diploid narcissus species can be fertile by generating unreduced pollen; Theo Sanders, Germany, 2014

Pollen Volume and Chromosome Content of Daffodils 3, Theo Sanders, Germany, 2014

A study of Pollen Volume and Chromosome Content of Daffodils; Possibilities for hybridizing, by Theo Sanders of Germany, January 2013

“Genome constitution of Narcissus variety ‘Tête-à-Tête’ analysed through GISH and NBS profiling” by Wu, Ramanna, Arens, and van Tuyl; Euphytica, September 2011

“The involvement of Narcissus hispanicus Gouan in the origin of Narcissus bujei and of cultivated trumpet daffodils,” B.J.M. Zonneveld; Anales del Jardin Botanico de Madrid, 67(1) 2010

“Unraveling Cryptic Reticulate Relationships and the origin of orphan hybrid disjunct populations in Narcissus,” Marques, I. et al, Evolution 64-8, pp 2353-2368,   2010

Looking at Pollen, Theo Sanders, The Daffodil Journal, Dec 2009

“The Systematic value of nuclear DNA content for all species of Narcissus;” B.J.M. Zonneveld; Plant Systematics and Evolution, 2008

“A New Study of Narcissus,” B.J.M. Zonneveld; The systematic value of nuclear DNA content for all species of Narcissus L.; ABSTRACT, Plant systematics and Evolution, 2008

“Geographic Variation in Floral Morphology and Style-morph ratios in a sexually polymorphic daffodil;” Kathryn A. Hodgins and Spencer C.H.Barrett; American Journal of Botany, 2008

“Morphological variation of Narcissus serotinus L. s. l. (Amaryllidaceae) in the Iberian Peninsula;” Lifante and Camacho, Botanical Journal of the Linnean Society, 2007

“Taxonomical and chorological contribution to the Sardinian flora [N. supramontanus],” by Pier Virgilio Arrigoni, Bocconea 19 — 2006

“Herkogamy and Mating Patterns in the Self-compatible Daffodil Narcissus longispathus,”  Medrano, et al, 2005, Annals of Botany 95

“An experimental evaluation of self-interference in Narcissus assoanus: functional and evolutionary implications,” Cesaro et al, Journal of Evolutionary Biology 17 (2004)

1981 – 2000

“New Chromosome Counts in Narcissus Cultivars,” Peter Brandham, 1997-1998

“Chromosome Numbers in Narcissus,” Peter Brandham, The Plantsman, 1992

  Lu Liuxin. A study on evolutionary relationship of the basic chromosome number between X=10 and X=11 in the polyanthous daffodils (Narcissus Tazatta L.)[J]., 1990, 8(2): 107-113.

“The chromosomes of species, hybrids and cultivars of Narcissus L. (Amaryllidaceae),” Peter Brandham, Kew Bulletin, Vol. 42 (1) 1987

“Notas Sobre la Cariologia del Genero Narcissus L.,” Loza et al, Anales Jardin Botanico de Madrid, 38 (1) 1981,  pp145-148

1960 – 1980

“L’Evolution Chez le Genre Narcissus L,,” A.Fernandes; Anales Inst. Bot. Cavanilles 32 (2) 1975

“Sur les Nombres Chromosomiques de quelques Formes Norticoles du Genre Narcissus L.,” A. Fernandes and M.T. deAlmeida; Boletim da Sociedade Broteriana,  1971

“Keys to the Identification of Native and Naturalized Taxa of the Genus Narcissus,” A. Fernandes, RHS Daffodil and Tulip Yearbook,  1968

1959 and earlier

“A genetical analysis of Pink Daffodils,” Edgar Anderson and Earl Hornbeck, Journal of California Horticultural Society

“Sur la Phylogenie des Especes du Genre Narcissus L.,” A. Fernandes; Boletim da Sociedade Broteriana Vol. XXV (2.a Serie),  1951

“On the Karyo-Systematics of the sub-genus Ajax Spach of the Genus Narcissus L.,” A. Fernandes and Rosette Fernandes; Herbertia, Vol. 13, 1946

“Number and Behavior of Chromosomes in the Genus Narcissus,” Seijin Nagao; College of Science, Kyoto Imperial University, 1933