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| | Royal Botanic Gardens, Kew: Science and Horticulture |
 | | Harley, R.M. Labiatae, in P.E. Berry, Yatskievych, K. & Holst, B.K. (eds.): Flora of the Venezuelan Guayana. |
 | | Taxonomic problems and cytotaxonomic relationships between and within varieties of O. basilicum and related species (Labiatae). |
 | | De Kok, R.P.J., Grayer, R.J. and Kite, G.C. Relationships of the endemic Australian genus Huxleya Ewart & Rees (Labiatae) based on fruit and flavonoid characters. |
| www.rbgkew.org.uk /scihort/lampubs.html (1076 words) |
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