Begonia ‘Red-Veined Nelumbiifolia’ is recorded in the IDB.
http://www.filemakerstudio.com...
GRIN has plant material available for
Begonia nelumbiifolia 'Red Vein'
I've contacted the individual who donated this material and revised our DB entry for
Begonia (Begonia nelumbiifolia 'Red-Veined') accordingly. Bill included images of the species (green veins on mature leaves), 'Red-Veined' (red veins on mature leaves) and 'Rubra' (green veins on mature leaves, red margin and some red spots on the leaf).
Here is a link to images that are either his or very close in appearance on the Houston ABS chapters web site showing all three.
http://begoniahouston.org/skey...