Codex Sloane 4016 is a 15th century Italian parchment manuscript belonging to a class of books known as herbals. These medicinal treatises recorded knowledge accumulated in the oral tradition about plants believed to possess therapeutic properties. See: one, two, three.
Produced in Lombardy in Northern Italy in 1440, 'Tractatus de Herbis' consists of over two hundred beautifully illustrated pages accompanied by Latin commentary in a Gothic script.
The whole manuscript (Sloane 4016) is accessible online from the British Library; including enlarged detail images.
A facsimile edition of 'Tractatus de Herbis' is available from the Spanish manuscript reproduction firm of M Moleiro.
VIA: Medieval & Earlier Manuscripts Blog | Miniaturaitaliana.