This is derived from Barbara Walker's 'Veined Leaf Panel' in her Second Treasury of Knitting Patterns, page 303. I've repeated the panel with a half-drop.
Shown with a cast-on count of 29 stitches.
1 2 3 4 5 Horizontal repeats
1 2 3 4 5 Vertical repeats
Swatch photo uploaded by chrisfourfalcon