Eschscholzia

Eschscholtzia Cham.

As currently understood Eschscholzia is a genus with 18 species in western North America and northern Mexico. Most contemporary accounts accept ca. 10-12 species (see for instance Clark 1997) while many more were described by early taxonomists. Recent molecular studies (Still 2011) demonstrated that some of the subspecies warrant specific rank and some new species were described which raised the number of currently accepted species to 18. One species, Eschscholzia californica, is widely cultivated as an ornamental in many regions of the world. According to Jäger & al. (2008) a second species (Eschscholzia tenuifolia Hook.) is also cultivated in Europe.

Literature:


Blunt W. (1977a) More poppycock: Eschscholzias: part 1. Garden (London) 102(1): 10-12.

Blunt W. (1977b) Poppycock: Eschscholzias part 2. Garden (London) 102(2): 68-69.

Clark C. (1997) Eschscholzia. In: Flora of North America Editorial Committee (eds.), Flora of North America, vol. 3. Oxford University Press, New York-Oxford: 308-312.

Clark C. & Jernstedt J.A. (1978) Systematic studies of Eschscholzia (Papaveraceae). II. Seed coat microsculpturing. Syst. Bot. 3: 386-402.

Ernst W.R. (1964) The genus Eschscholzia in the south Coast Ranges of California. Madroño 17: 281-294.

Frias D., Godoy R., Iturra P., Koref-Santibanez S., Navarro J., Pacheco N. & Stebbins G.L. (1975) Polymorphism and geographic variation of flower color in Chilean populations of Eschscholzia californica. Pl. Syst. Evol. 123(3): 185-198.

Greene E.L. (1905) Revision of Eschscholtzia. Pittonia 5: 205-308.

Jäger E.J., Ebel F., Hanelt P. & Müller G. (eds.) (2008) Rothmaler Band 5. Exkursionsflora von Deutschland. Krautige Zier- und Nutzpflanzen. Springer Verlag, Berlin: 880 p.

Lewis H. & Snow R. (1951) A cytotaxonomic approach to Eschscholzia. Madroño 11: 141-143.

Still S.M. (2011) Systematic and Taxonomic Studies of Eschscholtzieae (Papaveraceae). Ph.D., University of California: 240 p. 

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith