References
Edmonds, J.M., (1990). Herbarium Survey of African Corchorus L. species. Systematic and Ecogeographic Studies on Crop Genepools 4. IBPGR, Rome, Italy.

Ehrman, T. and Cocks, P.S. (1990) Ecogeography of annual legumes in Syria: distribution patterns. J. App. Ecol. 27:578-591.

Holmgren, P.K., Holmgren, N.H. and Barnett, L.C., (1990). Index Herbariorium I: The herbaria of the world (Ed. 8) International Association for Plant Taxonomy and New York Botanical Garden, New York.

Jones, D.A., (1973). Co­evolution and cyanogenisis. In: Taxonomy and Ecology. Ed. Heywood, V.H. pp. 213­242. Systematics Association Special Volume No. 5. Academic Press, London and New York.

Lampinen, R., S. Liu, and Brach, A. R. (1996). The Internet Directory for Botany. [http://herb.biol.uregina.ca/liu/bio/idb.html].

Maxted, N., (1995). An herbarium based ecogeographic study of Vicia subgenus Vicia. Systematic and Ecogeographic Studies on Crop Genepools.8. International Plant Genetic Resources Institute, Rome, Italy.

Miller, K. Allegretti, M.H., Johnson, N. and Jonsson, B., (1995). Measures for conservation of biodiversity and sustainable use of its components. In: Global Biodiversity Assessment. pp. 915-1061. Cambridge University Press.

New, J.K., (1958). A population study of Spergula arvensis L. Annals of Botany, New Series 22: 457-477.

Rafinski, J.N., (1979). Geographic variability of flower colour in Crocus scepusiensis (Iridaceae). Plant Systematics and Evolution 131: 107-125.

Rhoades, A.F. and Thompson, L., (1992). Integrating herbarium data into a geographic information system: requirements for spatial analysis. Taxon 41: 43-49.

Sawkins, M.C., (1995). A study of papilionoid legumes in Madagascar using evolutionary and distributional data to identify priority areas for conservation. Master of Science Thesis, University of Birmingham.

Anon., (1988). Atlas of the World, ed. 7. Times Books, London.

van Slageren, M.W., (1990). Genetic Resources Unit. 1989 Annual Report. ICARDA, Aleppo.

Williams, P.H. and Humphries, C.J., (1994). Biodiversity, taxonomic relatedness and endemism in conservation. In: Systematics and Conservation Evaluation. Eds. Forey, P.L., Humphries, C.J., and Vane-Wright, R.I. pp. 269-287. Clarendon Press, Oxford.
Selected Further Reading
Cocks, P.S. and Ehrman, T.A.M., (1987). The geographic origin of frost tolerance in Syrian pasture legumes. Journal of Applied Ecology 24:678­683.

Davis, S.D., Droop, S.J.M., Gregerson, P., Henson, L., Leon, C.J., Lamlein Villa-Lobos, J., Synge, H. and Zantovska, J., (1986). Plants in Danger: What Do We Know? International Union for Conservation of Nature and Natural Resources, Gland, Switzerland.

Ehrman, T.A.M. and Maxted, N., (1990). Ecogeographic survey and collection of Syrian Vicieae and Cicereae (Leguminosae). Plant Genetic Resources Newsletter 77:1-8.

Frodin, D.G., (1984). Guide to the Standard Floras of the World. Cambridge University Press, Cambridge.

Guarino, L., (1995). Geographic information systems and remote sensing for plant germplasm collectors. In: Collecting plant genetic diversity: technical guidelines (eds. Guarino, L., Ramanatha Rao, V. and Reid, R.), pp. 287-314. CAB International, Wallingford.

Haslett, J.R., (1990). Geographical Information Systems: A new approach to habitat definition and the study of distributions. Tree, 5(7): 214-218.

IBPGR, (1985). Ecogeographic surveying and in situ conservation of crop relatives. Report of an IBPGR task force meeting held at Washington D.C., U.S.A. International Board for Plant Genetic Resources, Rome, Italy.

Maxted, N., (1995). An ecogeographic study of Vicia subgenus Vicia. Systematic and Ecogeographic Studies in Crop Genepools 8. IBPGR, Rome. pp. 184.

Maxted, N., van Slageren, M.W. and Rihan, J., (1995). Ecogeographic surveys. In, Collecting plant genetic diversity: technical guidelines (eds. Guarino, L., Ramanatha Rao, V. and Reid, R.), pp. 255-286. CAB International, Wallingford.

Nabhan, G.P., (1990). Wild Phaseolus Ecogeography in the Sierra Madre Occidental, Mexico. Systematic and Ecogeographic Studies on Crop Genepools 5. IBPGR, Rome, Italy.

Room, A., (1979). Place Name Changes Since 1900. The Scarecrow Press, London.

Sanchez, J.J.G. and Ordaz, S., (1987) El Teocintle en Mexico. Systematic and Ecogeographic Studies on Crop Genepools 2. IBPGR, Rome, Italy.

Strid, A., (1970). Studies in the Aegean flora. XVI. Biosystematics of the Nigella arvensis complex with special reference to the problem of non-adaptive radiation. Op. bot. Soc. bot. Lund. 28:1-169.

von Bothmer, R., Jacobsen, N., Baden, C., Jfrgensen and Linde-Laursen, I., (1991). An ecogeographic study of the genus Hordeum. Systematic and Ecogeographic Studies on Crop Genepools 7. IBPGR, Rome, Italy.

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