@book {8606,
	title = {De wateringen},
	year = {1990},
	month = {1990///},
	pages = {149 - 156},
	publisher = {Genk},
	organization = {Genk},
	author = {P. Hermans}
}
@article {8323,
	title = {Phylogenetic Analysis of Chloroplast DNA in North American Gutierrezia and Related Genera (Asteraceae: Astereae)},
	journal = {Syst. Bot},
	volume = {15},
	year = {1990},
	month = {1990///},
	pages = {660 - 670},
	author = {Y. Suh and B.B. Simpson}
}
@article {8223,
	title = {Ambrosia trifida L. 1753 (Asteraceae): new adventive plant in Slovenia (Yugoslavia)},
	journal = {Razpr. Slov. Akad. Znan. Utmet},
	volume = {31},
	year = {1990},
	month = {1990///},
	pages = {391 - 396},
	author = {O. Vasic}
}
@article {8224,
	title = {Alyssum montanum _ komplex na jugovzhodnem obrobju Alp},
	journal = {Razpr. Slov. Akad. Znanosti Umetn., Razr. Narav. Vede Cl},
	volume = {31},
	year = {1990},
	month = {1990///},
	pages = {375 - 390},
	author = {D. Trpin}
}
@article {8228,
	title = {Amaranthus},
	journal = {Real Jard{\'\i}n Bot{\'a}nico, Madrid},
	volume = {2},
	year = {1990},
	month = {1990///},
	pages = {554 - 569},
	author = {J.L. Carretero}
}
@article {8206,
	title = {K _{\'\i}_en{\'\i} druhu Atriplex sagittata},
	journal = {Preslia},
	volume = {62},
	year = {1990},
	month = {1990///},
	pages = {337 - 349},
	author = {M. Kopeck{\'y} K. \& Lhotska}
}
@article {8283,
	title = {Taxonomy of Digitaria section Aequiglumae (Poaceae: Paniceae)},
	journal = {Sida},
	volume = {14},
	year = {1990},
	month = {1990///},
	pages = {145 - 167},
	author = {R.D. Webster and S.L. Hatch}
}
@article {8077,
	title = {Rumex cristatus DC. en France},
	journal = {Monde Pl},
	volume = {437},
	year = {1990},
	month = {1990///},
	pages = {1 - 3},
	author = {P. Jauzein}
}
@article {8052,
	title = {Die Gattung Baccharis L. (Compositae-Asteraceae) in Chile},
	journal = {Mitt. Bot. Staatssamml. M{\"u}nchen},
	volume = {29},
	year = {1990},
	month = {1990///},
	pages = {1 - 456},
	author = {F. Helwig}
}
@article {8181,
	title = {Studies in the systematics of Mexican and Texan Grindelia (Asteraceae: Astereae)},
	journal = {Phytologia},
	volume = {68},
	year = {1990},
	month = {1990///},
	pages = {303 - 332},
	author = {G.L. Nesom}
}
@inbook {7999,
	title = {Amaranthaceae},
	booktitle = {Kvetena {\v C}esk{\'e} Republiky},
	volume = {2},
	year = {1990},
	month = {1990///},
	pages = {291 - 310},
	publisher = {Academia, Praha},
	organization = {Academia, Praha},
	author = {V. Jehl{\'\i}k},
	editor = {S., Hejn{\'y} and B., Slav{\'\i}k}
}
@article {8104,
	title = {A propos de quelques adventices d_origine m{\'e}diterran{\'e}enne observ{\'e}es {\`a} Slins (province de Li{\`e}ge, Belgique)},
	journal = {Nat. Mosana},
	volume = {43},
	year = {1990},
	month = {1990///},
	pages = {1 - 5},
	author = {J. Lambinon and J.-M, Dieu}
}
@article {8112,
	title = {Une adventice nouvelle pour la Belgique: Conyza sumatrensis {\`a} Ch{\^a}telineau (province du Hainaut)},
	journal = {Nat. Mosana},
	volume = {43},
	year = {1990},
	month = {1990///},
	pages = {121 - 123},
	author = {M. Lannoy}
}
@article {7897,
	title = {Der {\"O}sterreichische Beifu{\ss} (Artemisia austriaca Jacq.) im n{\"o}rdlichen Oberrheingebiet},
	journal = {Hess. Florist. Briefe},
	volume = {39},
	year = {1990},
	month = {1990///},
	pages = {37 - 41},
	author = {D. Korneck}
}
@article {7638,
	title = {The present status of Lepidium latifolium with particular reference to Essex},
	journal = {Nature in N.E .Essex},
	volume = {1988},
	year = {1990},
	month = {1990///},
	pages = {30 - 32},
	author = {A.J. Wake}
}
@article {7679,
	title = {Panicum dichotomiflorum Michaux, ein neues Unkraut der Mais{\"a}cker in Nordwestdeutschland},
	journal = {Flor. Rundbr.},
	volume = {24},
	year = {1990},
	month = {1990///},
	pages = {13 - 18},
	author = {H.E. Weber}
}
@article {7392,
	title = {Variation and taxonomy of Phytolacca americana and P. rigida in the southeastern United States},
	journal = {Bull. Torrey Bot. Club},
	volume = {117},
	year = {1990},
	month = {1990///},
	pages = {357 - 367},
	author = {D.B. Caulkins and R. Wyatt}
}
@article {7482,
	title = {Zum Vorkommen von Lepidium heterophyllum (DC) BENTH. (Brassicaceae) in der Eifel},
	journal = {Decheniana},
	volume = {143},
	year = {1990},
	month = {1990///},
	pages = {189 - 193},
	author = {P. Gerstberger}
}
@article {7411,
	title = {A numerical taxonomic analysis of the Medicago littoralis - M. truncatula complex},
	journal = {Canad. J. Bot},
	volume = {68},
	year = {1990},
	month = {1990///},
	pages = {1667 - 1674},
	author = {E. Small and B. Brookes}
}
@article {7305,
	title = {Arabis turrita - a garden weed in West Kent},
	journal = {BSBI News},
	volume = {36},
	year = {1990},
	month = {1990///},
	author = {J.R. Palmer}
}
@article {7259,
	title = {Bidens (Bur-marigolds) in Glamorgan},
	journal = {BSBI News},
	volume = {56},
	year = {1990},
	month = {1990///},
	pages = {12 - 15},
	author = {C. Hipken}
}
@article {7073,
	title = {Zur Verbreitung der Behaarten Karde (Dipsacus pilosus L.) und der Schlanken Karde (Dipsacus strigosus Willd. ex Roemer et Schultes) in Oberfranken},
	journal = {Ber. Naturforsch. Ges. Bamberg},
	volume = {65},
	year = {1990},
	month = {1990///},
	pages = {25 - 61},
	author = {T. Helfrich and W. Lohwasser}
}
@article {7079,
	title = {Bromus diandrus Roth},
	journal = {Berliner Population. Verhandlungen des Botanischen Vereins von Berlin und Brandenburg},
	volume = {8},
	year = {1990},
	month = {1990///},
	pages = {93 - 96},
	author = {B{\"o}cker, R. and Erzberger, P. and Scholz, H.}
}
@article {7064,
	title = {Artemisia austriaca Jacq. bei Bamberg},
	journal = {Ber. Bayer. Bot. Ges},
	volume = {61},
	year = {1990},
	month = {1990///},
	author = {D. Korneck}
}
@article {7152,
	title = {Zwei kritische Rumex- Arten, R. longifolius DC. und R. aquitanicus Rech. f., und ihre Verbreitung},
	journal = {Bot. Jahrb},
	volume = {111},
	year = {1990},
	month = {1990///},
	pages = {347 - 364},
	author = {K.H. Rechinger}
}
@article {7081,
	title = {The origin of Helianthus x multiflorus and H. x laetiflorus (Asteraceae)},
	journal = {Biochem. Syst. Ecol},
	volume = {18},
	year = {1990},
	month = {1990///},
	pages = {19 - 23},
	author = {O. Spring and E.E. Schilling}
}
