Commercially available

• MEIelec
• Samourai

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Medium red Grandiflora.
Registration name: Samourai
Exhibition name: Scarlet Knight

Bred by Marie-Louise (Louisette) Meilland (1920-1987) (France, 1966).
Introduced in France by URS (Universal Rose Selection)-Meilland in 1966.
Introduced in Australia by Treloar Roses in 1967 as 'Samourai'.
Introduced in United States by Conard-Pyle (Star Roses) in 1967.

Grandiflora.  

Red.  Mild fragrance.  25 to 30 petals.  Average diameter 5".  Very large, full (26-40 petals), borne mostly solitary, cluster-flowered, in small clusters, cupped bloom form.  Blooms in flushes throughout the season.  

Medium, armed with thorns / prickles, bushy, upright.  Large, leathery foliage.  
Height of up to 32" (up to 80 cm).  

USDA zone 6b and warmer.  Can be used for cut flower or garden.  Produces decorative hips.  Spring Pruning: Remove old canes and dead or diseased wood and cut back canes that cross. In warmer climates, cut back the remaining canes by about one-third. In colder areas, you'll probably find you'll have to prune a little more than that.  Requires spring freeze protection (see glossary - Spring freeze protection) .  

United States - Patent No: PP 2,692  on  13 Dec 1966   VIEW USPTO PATENT

According to Peter Harris, when 'Scarlet Knight' is used in a rosebreeding program it will produce nearly 100% reds and red bicolors if selfed, which means it's a dominant red/bicolor.