5 cm approximately 4 2 cm on average in width from a mature seven leaflet leaf approximately 3 to 6 5 cm approximately 5 cm on average in length and approximately 2 5 to 5 cm approximately 3 7 cm on average in width color adult foliage upper surface between green group 139a and yellow green group 147a under surface near green group 137c number of flowers u2014 typically approximately 1 to 5 per inflorescence peduncle u2014 commonly approximately 2 5 to 6 5 cm approximately 4 5 cm on average in length and approximately 2 5 to 3 6 mm approximately 3 mm on average in diameter sepals u2014 five in number lanceolate commonly with a few foliaceous extensions and rarely a sepal is found having substantially the same coloration as the petals buds u2014 shape narrow ovoid size when the first sepal is reflexed the diameter is approximately 14 to 15 5 mm approximately 15 mm on average flower u2014 form very double and cup shaped when mature diameter approximately 6 to 9 cm approximately 7 5 on average when fully open overall appearance stark bright white with a very light green hue when first opening color when fully open upper surface near white group 155d at the upper edge moving towards the petal base the predominant color shifts to near white group 155a and then shades towards and through green white group 157d group 157c 157b and 157a in the direction of the petal base the veins tend to be darker and commonly are near yellow green group 145c and 145d under surface primarily near white.