Journal of Ethnopharmacology 65 (1999) 165 – 172 Short communication The medicinal flora of Similipahar forests, Orissa State, India R.D. Girach *, A.A. Shaik, S.S. Singh, Mustaq Ahmad Surey of Medicinal Plants Unit, Regional Research Institute of Unani Medicine, Bhadrak 756100, India Received 29 August 1997; accepted 8 August 1998 Keywords: Jammu and Kashmir flora; Medicinal flora; North America 1. Introduction The Similipahar hills of Mayurbhanj district are located between 20°17and 22°10north latitudes and 85°57and 86°47east longitudes in the State of Orissa, occupying a southeastern portion of India. The forests of Similipahar, extending over an area of 2750 km 2 , are among the most luxuri- ant and valuable forests of the State. The hills, with their innumerable crests and valleys, inter- spersed with countless streams and rivers exhibit a great degree of topographic variation, ranging from 300 to 1166 m above sea level. Geological formation of the region consists of submetamor- phic sandstones and quartzite haematites. The red sandy soil is found throughout the iron belt from Gorumohisani hills to Thakurmunda and in Badampahar and Suliapat. The flora of the Simili- pahar with economically useful plants has recently been described by Saxena and Brahmam (1989) while the medicinally useful plants of the region have been described in various recent papers (Sax- ena and Dutta, 1975; Mudgal and Pal, 1980; Saxena et al., 1981; Tribedi et al., 1982; Saxena and Brahmam, 1989). The present study was un- dertaken to determine the degree of importance of plant families in the medicinal flora of the region. 2. Methodology The data shown in Table 1 are based on medic- inal uses of plants recorded in the sources listed above, in addition to the field trips of 20 days each in 1985, conducted by RDG in the region. The field trip resulted in the collection of 270 plant species, belonging to 217 genera and 86 plant families. The plants have been placed in the families according to the Bentham and Hooker system of classification. The nomenclature has been based on the most recent work in the geo- graphic area by Saxena and Brahmam (1989). Using the method of regression and residual anal- ysis recently described by Kapur et al. (1992) in * Corresponding author. 0378-8741/99/$ - see front matter © 1999 Elsevier Science Ireland Ltd. All rights reserved. PII: S0378-8741(98)00146-9