HOWARD & PROCTOR. BAUXITIC SOILS. II VEGETATION ON BAUXITIC SOILS IN JAMAICA, II RICHARD A. HOWARD AND GEORGE R. PROCTOR THE FIRST PART OF THIS PAPER (Jour. Arnold Arb. 38: 1-41. 1957) described the vegetation of Jamaica in areas of commercial accumulations of bauxite ores and considered the relationship of this vegetation to the aluminum ions in the soils. Also considered were the effects of the mining operations on the vegetation as well as the terrain. The surveys of the vegetation made by the authors on lands to be mined and on lands ad-jacent to the mined-out areas where seed trees could contribute to the revegetation of abandoned mine pits were described. Certain pits from which the available bauxitic ore has been removed were designated as control pits to observe the invasion, succession and competition of natural reseeding. Other mined-out pits have been resurfaced or recontoured and planted to pasture grasses, stands of forest trees, or agricultural crops of vegetables and fruits. We have commented on the success of these re-habilitation attempts to the present. Throughout their study of the vegetation on bauxite soils in Jamaica both authors have searched for undisturbed areas of vegetation in which could be found indications of a selection through survival of plants tolerant to or requiring aluminum ions for their persistence. Such plants they felt might be considered as indicators of aluminum concentrations and there-fore of further aid in both an interpretation of vegetation types in other parts of Jamaica as well as being a valuable aid in the search for addi-tional aluminum deposits. They have indicated that in neither the parish of St. Ann near the operations of the Reynolds Jamaica Mines nor in the parish of St. Elizabeth near the mining operations of Kaiser Bauxite Company could they find undisturbed areas of forest, shrub or herbaceous vegetation. All have shown the effects of man's long occupancy of the respective areas through gardening, pasturage or forest utilization. Mining operations are to the present being conducted on lands with a long history of agricultural usage. Further development in the parishes of Trelawny and Portland should reveal less disturbed vegetation associated with bauxite. The following tabulation is a summary of our findings to date. Listedare the species which we have found by a careful study of the existingvegetation in the two principal areas of commercial bauxite mining inJamaica. Species are listed according to the genera and families of theirrelationship and, for the sake of convenience, are alphabetical. The fernsand allied non-flowering plants have been grouped together. The mono-cotyledons are listed before the dicotyledons. Species lists are presentedfor the area of Reynolds Jamaica Mines operations in the parish of St.Ann and for the area of mining operations of the Kaiser Bauxite Com-pany in the parish of St. Elizabeth. We have tabulated the species as theyoccurred in three arbitrary divisions for each area. Representatives of1957]
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