Codiaeum variegatum Mortii
REF: Brown, B. Frank 1995 Crotons of the World p.94 & 103.
Type K, 2-3/4" x 14", - Ground color deep green with midrib and veining outlined deep yellow in normal leaf. In some leaves the yellow is so heavy that is becomes the predominate color. Tall.
REF: Paper prepared by Wm. A. Geiger in collaboration with Mr. Christian of the Christian Nursery, Mr. Van der Lean and Mr. George L. Peacock. p.12.
A tall growing variety, with leaves veined yellow; sometimes called all yellow.
REF: Reasoner's Tropical Nurseries inc, croton listing. Group 1, Common Varieties, p.2.
In Mortii the ground color of the leaves is deep glossy green, the midribs yellow. The leaves are also barred by broad lines of the same color, the broadest part of the leaves being near the apex.” SOURCE: http://chestofbooks.com/gardening-horticulture