R.  Portal, Agrostis de France. Vals près Le Puy, 2009, pp. 303 - 303.

M.  Doroftei, ?Chorology of Amorpha fruticosa in the Danube Delta?, Rom. J. Biol.-Plant Biol., vol. 54, no. 1, pp. 61 - 67, 2009.

J.  De Koning, van Den Broek. Nederlandse Dendrologie (14th ed.). K.N.N.V, 2009.

J.  De Koning, Nederlandse Dendrologie (13 e druk, geheel herzien). Veenman & Zonen, Ede, 2009.

J.  Fryer, Cotoneasters. A comprehensive guide to shrubs for flowers, fruit, and foliage. Timber Press, Portland-London, 2009.

P.  Sell and Murrell, G., Flora of Great Britain and Ireland. Vol. 3 Mimosaceae _ Lentibulariaceae. Cambridge University Press, Cambridge: XXVIII, 2009.

T.  Wilhalm, ?Digitaria ciliaris in Europe?, Willdenowia, vol. 39, pp. 247 - 259, 2009.

A. S.  Vega, Rua, G. H., and Fabbri, L. T., ?A Morphology-Based Cladistic Analysis of Digitaria (Poaceae, Panicoideae, Paniceae)?, Syst. Bot. 34, no. 2, pp. 312 - 323, 2009.

C.  Buhr and Kummer, V., ?Beitrag zur Flora des Potsdamer Stadtgebietes III?, Verh. Bot. Ver. Berlin Brandenburg, vol. 142, pp. 133 - 183, 2009.

P. W.  Michael, ?Echinochloa colona versus "Echinochloa colonum" (Poaceae)?, Taxon, vol. 58, no. 4, pp. 1366 - 1368, 2009.

S.  Donadio, Giussani, L. M., Kellogg, E. A., Zuloaga, F. O., and Morrone, O., ?A preliminary molecular phylogeny of Pennisetum and Cenchrus (Poaceae-Paniceae) based on the trnL-F, rpl16 chloroplast markers?, Taxon, vol. 58, no. 2, pp. 392 - 404, 2009.

F.  Essl, ?Changes in the spatio-temporal patterns and habitat preferences of Ambrosia artemisiifolia during invasion of Austria?, Preslia, vol. 81, pp. 119 - 133, 2009.

P.  Pet?ík, Dostálek, J., and Neuhäuslová, Z., ?Combining numerical and traditional approaches to classify Echinops sphaerocephalus invaded communities in the Czech Republik?, Phytocoenologia, vol. 39, pp. 253 - 264, 2009.

T.  Raycheva, ?Critical reassessment of the distribution of some taxa of Rumex subgenus Rumex (Polygonaceae) in Bulgaria _ 2?, Phytol. Balcan. 15, no. 2, pp. 155 - 169, 2009.

R.  De Clercq, ?Een nieuwe vondst voor de Vlaamse Ardennen. Mansoor _ Asarum europaeum?, Nieuwsbrief Planten Natuurpunt, vol. 9, no. 2, pp. 45 - 46, 2009.

P.  Frankard and Hauteclair, P., ?Inventaire et diversité de la flore vasculaire des terrils charbonniers liégeois _ bilan de vingt-cinq années de prospections (1983-2007)?, Natura Mosana, vol. 62, no. 2, pp. 37 - 70, 2009.

A.  Lombard, ?Résultats d_herborisations en banlieue parisienne à Ivry-sur-Seine (Val-de-Marne) et ses environs?, Monde Pl, vol. 497, pp. 5 - 11, 2009.

X.  C-M, C-Y, Q., W-G, Y., X-J, Z., and F-Z, L., ?Phylogenetic origin of Beckmannia (Poaceae) inferred from molecular evidence?, Journ. Syst. Evol, vol. 47, no. 4, pp. 305 - 310, 2009.

J.  Klotz, ?Die Verbreitung von Bidens frondosa bei Regensburg?, Hoppea, vol. 70, pp. 105 - 118, 2009.

W.  Holverda, van Moorsel, R., and Duistermaat, L., ?Nieuwe vondsten van zeldzame planten in 2005, 2006 en ten dele 2007?, Gorteria, vol. 34, pp. 1 - 40, 2009.

J.  Klotz, ?Breitet sich Ambrosia artemisiifolia im Raum Regensburg weiter aus?, Hoppea, vol. 70, pp. 97 - 104, 2009.

M.  Galbany-Casals and Garcia-Jacas, N., ?Phylogeny, biogeography and character evolution in mediterranean, asiatic and macaronesian Helichrysum (Asteraceae, Gnaphalieae) inferred from nuclear phylogenetic analyses?, International Journal of Plant Sciences 170, vol. 365, 2009.

B.  Mandák, ?How does population genetic diversity change over time? An experimental seed bank study of Atriplex tatarica (Chenopodiaceae)?, Flora, vol. 204, pp. 423 - 433, 2009.

E.  Garve and Zacharias, D., ?Ein Fund von Chorisporatenella in Südniedersachsen?, FloristischeRundbriefe, vol. 42, pp. 77 - 82, 2009.

M.  Englund, Pornpongrungrueng, P., Gustafsson, M. H. G., and Anderberg, A. A., ?Phylogenetic relationships and generic delimitation in Inuleae subtribe Inulinae (Asteraceae) based on ITS and cpDNA sequence data?, Cladistics, vol. 25, no. 4, pp. 319 - 352, 2009.

E. J.  Weeda, ?The role of archaeophytes and neophytes in the Dutch coastal dunes. J?, Coast Conserv, vol. 14, no. 2, pp. 75 - 79, 2009.

I.  Hoste, Verloove, F., Nagels, C., Andriessen, L., and Lambinon, J., ?De adventievenflora van in België ingevoerde mediterrane containerplanten?, Dumortiera, vol. 97, pp. 1 - 16, 2009.

I.  Hoste, Verloove, F., Nagels, C., Andriessen, L., and Lambinon, J., ?De adventievenflora van in België ingevoerde mediterrane containerplanten?, Dumortiera, vol. 97, pp. 1 - 16, 2009.

A.  Bizot, ?Miscanthus xgiganteus J.M.Greef & Deuter ex Hodk. & Renvoize, une nouvelle graminée récemment cultivée dans les Ardennes?, Bull. Soc. Hist. Nat. Ard, vol. 99, pp. 59 - 64, 2009.

E. J.  Clement, ?Triple trouble over Onobrychis identification?, BSBI News, vol. 112, pp. 19 - 20, 2009.

L. _ & V. Stukonis, ?Zizania latifolia _ a new alien plant in Lithuania [Z izania latifolia _ naujas svetim_emis augalas Lietuvoje]?, Botanica Lithuanica, vol. 15, no. 1, pp. 17 - 24, 2009.

S.  Follak, ?Vorkommen und potenzielle Verbreitung des Rispenkrauts (Iva xanthiifolia) in Österreich?, Bot. Helv, vol. 119, no. 1, pp. 7 - 12, 2009.

T.  Kawahara, ?Molecular phylogeny among Triticum-Aegilops species and of the tribe Triticeae?, Breeding Science, vol. 59, no. 5, pp. 499 - 504, 2009.

A. S.  Petrova and Vladimirov, V., ?Two alien species of Bidens (Asteraceae) new to the Bulgarian flora. Phytol?, Balcan, vol. 15, no. 3, pp. 367 - 371, 2009.

E.  Cabi and E, C., ?Morphological and palynological features of the genus Dasypyrum (Poaceae) in Turkey. Phytol?, Balcan, vol. 15, no. 3, pp. 393 - 400, 2009.

V.  Vladimirov, ?Erigeron sumatrensis (Asterace ae): a recently recognized alien species in the Bulgarian flora. Phytol?, Balcan, vol. 15, no. 3, pp. 361 - 365, 2009.

, ?An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants. APG III?, Bot. J. Linn. Soc., vol. 161, no. 2, pp. 105 - 121, 2009.

A. P. G.  III, ?An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants. APG III?, Bot. J. Linn. Soc. 161, no. 2, pp. 105 - 121, 2009.

M.  Nobis, ?Eragrostis pilosa (L.) P. Beauv. (Poaceae) in Poland?, Biodiversity: Research and Conservation, vol. 13, pp. 13 - 16, 2009.

M.  Hohla, ?Bromus pumpellianus, Mimulus ringens und Poa bigelovii _ neu für Österreich, sowie weitere Beiträge zur Kenntnis der Flora des Innviertels?, Beitr. Naturk. Oberösterreichs, vol. 19, pp. 151 - 175, 2009.

M. Q.  Hayat, Ashraf, M., Khan, M. A., Yasmin, G., Shaheen, N., and Jabeen, S., ?Phylogenetic analysis of Artemisia L. (Asteraceae) based on micromorphological traits of pollen grains?, Afr. Journ. Biotechn, vol. 8, no. 23, pp. 6561 - 6568, 2009.

A. W. _sowicz P.  Rosta_ski, ?The use of quantitative characters in determination of frequently misdiagnosed species within Lepidium L. sect. Dileptium (Brassicaceae)?, Acta Soc. Bot. Polon, vol. 78, no. 3, pp. 221 - 227, 2009.

A.  A. Morales, ?Schkuhria pinnata (Lam.) Kuntze (Compositae), nueva especie para la flora de Extremadura?, Acta Bot. Malacit, vol. 34, pp. 226 - 228, 2009.

{A. P. G. }{ III}, ?An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants. {APG} {III}?, Bot. J. Linn. Soc., vol. 161, pp. 105?121, 2009.

J.  Lambinon and Verloove, F., ?Epilobium brachycarpum (Onagraceae), xénophyte américaine naturalisée dans le département du Nord (France)?, Dumortiera, vol. 96, pp. 17-19, 2009.

I.  Hoste and Verloove, F., ?Mediterranean container plants and their stowaways: A potential source of invasive plant species?, Science Facing Aliens. Belgian Biodiversity Platform, Brussels, pp. 39-44, 2009.

F.  Verloove, Nagels, C., Andriessen, L., Hoste, I., and Lambinon, J., ?De adventievenflora van in België ingevoerde mediterrane containerplanten?, Dumortiera, vol. 97, pp. 1-16, 2009.