Re no origin listed for Samourai Cl.

SAMOURAI CL.
J. Jack, Australia (registered 1973); Int. A. Ross & Son. 1972
sport of Scarlet Knight* [syn Samourai]

1974 Australian Rose Annual
p31. New Rose Registrations. Clg. Samourai. Cl. HT. J. Jack. Year of registration: 1973.

1974 American Rose Annual
p148. Climbing Samourai. Cl. HT. medium red. (John Jack; int. A. Ross & Son, ’72). Sport of ‘Samourai’. Color and shape same as parent. Normal amount of leathery foliage. Vigorous growth. Climbing habit. Free bloom. Aust.

1996. Dianne Ackland “The Australian Rose Directory” 2nd Edition 1996
p134. Samourai Clg. (Scarlet Knight Clg.) Sport of Scarlet Knight), Ross, Australia, 1972. Climber Red. (Available from) Ross, Roworth, Thomas.

1997 Australian Rose Annual
p35. David Ruston. Australian Sports. Clg. Samourai (HT) Ross Roses 1972. – a great glowing red colour at its best full blown.

1999. Dianne Ackland “The Australian Rose Directory” 3rd Edition 1999
p90. Samourai Clg. (Scarlet Knight Clg). Sport of Scarlet Knight). Ross, Australia, 1972. Climber. Red. (Available from) Morton, Ross, Roworth, Thomas.