1) It has two quite distinct meanings. In springwood contexts it was possibly ‘wood suitable for logs or sawn into logs’.
1704 And also all stovens and logwood trees in the said Spring Woods, Bradley. In the Colne Bridge charcoal account for 1710 were entries for Logwood from several local woods, e.g. Logwood from Ethercliffe: this was measured at 17Ľ Coards, 9 Doz [en] and 10 S – an abbreviation which is probably for ‘seam’. In connection with dyeing it was the heartwood of a tree found in the Americas which was imported in blocks or logs: 1600 in dying wooll & Wollen clothe Logwood als Blockwoodd callide, Holbeck
1668 4 Qtrs of bluegalles
3 Qtrs 19 lb & 1 oz Log wood
1 Qtr of Fustick, Slaithwaite
1758 To dye black best way. Boyl in logwood and shumak att night, Wakefield.